null  null
C O M M IS S IO N IN G , O P E R A T IN G AN D
M AIN T E N AN C E M AN U AL
Ref : NP48UGB
GAS DETECTION
We are delighted that you have chosen an INDUSTRIAL SCIENTIFIC instrument and would like to thank
you for your choice.
We have taken all the necessary measures to ensure that your instrument provides total satisfaction.
Now it is important to read this document carefully.
EXTENT OF RESPONSIBILIT Y
* INDUSTRIAL SCIENTIFIC declines its responsibility towards any person for material damage, physical injury
or death resulting wholly or partly from inappropriate use, installation or storage of its equipment resulting from
failure to observe instructions and warnings and/or standards and regulations in force.
* INDUSTRIAL SCIENTIFIC neither supports nor authorises any company, physical or moral person to assume
responsibility on behalf of INDUSTRIAL SCIENTIFIC , even if it is involved in the sale of INDUSTRIAL
SCIENTIFIC products.
* INDUSTRIAL SCIENTIFIC cannot be held responsible for direct or indirect damage or be required to pay direct
or indirect compensation resulting from the sale or use of any of its products IF THESE PRODUCTS HAVE NOT
BEEN DEFINED AND CHOSEN BY INDUSTRIAL SCIENTIFIC FOR THEIR SPECIFIC USE.
CLAUSES CONCERNING PROPERTY
* Drawings, plans, specifications and information included in this document contain confidential information that is
the property of INDUSTRIAL SCIENTIFIC
* None of this information may be reproduced, copied, divulged or translated, by physical, electronic or any other
means, nor used as the basis for the manufacture or sale of INDUS TRIAL SCIENTIFIC equipment or for any
other reasons without prior consent from INDUSTRIAL SCIENTIFIC
WARNINGS
* This document is not contractually binding. In the interests of its customers, INDUSTRIAL SCIENTIFIC
reserves to modify the technical specifications of its equipment without notice, in order to improve its performance.
* READ THIS MANUAL CAREFULLY BEFORE FIRST USE OF THE EQUIPMENT: this manual must be
read by any person who is or will be responsible for using, maintaining or repairing this equipment.
* This equipment will only provide the announced performance levels if it is used, maintained and repaired
according to INDUSTRIAL SCIENTIFIC directives, by INDUSTRIAL SCIENTIFIC personnel or by
personnel approved by INDUSTRIAL SCIENTIFIC
GUARANTEE
2 years guarantee in normal conditions of use on parts and technical labour, return in our workshops, excluding
consumables (sensors, filters, etc.)
3
CO N TE N T S
1.
DESCRIPTION.......................................................................................6
1.1.
1.2.
1.3.
2.
General .................................................................................................................... 6
the wall-mounted box .............................................................................................. 8
The various printed circuit boards .......................................................................... 8
INSTALLATION AND CONNECTIONS...............................................9
2.1.
2.2.
2.2.1.
Installation: recommendations................................................................................ 9
Electrical connections of the MX48 Unit (Fig. 8) ................................................... 9
Alternative power supply......................................................................................... 9
2.2.2.
DC power supply ................................................................................................... 10
2.3.
2.3.1.
Detectors (Figure 12) ............................................................................................ 10
Explosimetric detectors of PONT type .................................................................. 10
2.3.2.
3-wire detectors 4-20 mA: 3 connecting wires for shielded cable ........................ 10
2.3.3.
2-wire detectors 4-20 mA: 2 connecting wires for shielded cable ........................ 11
2.3.4.
FIRE detectors: 2 connecting wires for shielded cable ......................................... 11
2.3.5.
FLAME detectors: 2, 3 or 4 connecting wires for shielded cable depending on
utilization............................................................................................................... 11
3.
2.3.6.
CO2 detector of type “Ventostat VT” ................................................................... 13
2.3.7.
Specific case of intrinsic safety detectors .............................................................. 13
2.3.8.
Other detectors with standardized current output .................................................. 14
2.3.9.
Parking application................................................................................................ 14
2.4.
2.4.1.
Connecting the unit to external devices................................................................. 15
Slaving controls ..................................................................................................... 15
2.4.2.
4-20 mA current outputs (Fig. 12) ......................................................................... 16
2.4.3.
RS 232 and RS 485 outputs ................................................................................... 16
2.4.4.
Remote acknowledgement ..................................................................................... 18
STARTING UP......................................................................................19
3.1.
3.2.
3.3.
3.3.1.
Checking the installation....................................................................................... 19
Switching on the unit ............................................................................................. 19
Operating modes ................................................................................................... 20
Audio warning device (buzzer) ............................................................................. 20
3.3.2.
Light-emitting diodes (LED) (Fig. 1 and fig 4) ..................................................... 20
3.3.3.
Alarm thresholds.................................................................................................... 21
3.3.4.
Fault thresholds...................................................................................................... 25
3.3.5.
Measuring unit ....................................................................................................... 26
4
4.
UTILIZATION......................................................................................27
4.1.
List and functions of the various items of “USER” equipment for programming
and calibration of the unit ......................................................................................................... 27
4.1.1.
Keypads ................................................................................................................. 27
4.1.2.
Maintenance keys .................................................................................................. 28
4.1.3.
Potentiometers ....................................................................................................... 28
4.2.
4.2.1.
Menus .................................................................................................................... 29
The various menus and their functions .................................................................. 29
4.2.2.
Block diagram of the scrolling of the various menus ............................................ 29
4.2.3.
Detailed flow diagrams of each menu ................................................................... 31
5.
SETTING THE MX48 UNIT INTO SERVICE ....................................44
5.1.
5.2.
5.2.1.
Programming the unit............................................................................................ 44
Programming the measuring channels.................................................................. 44
Programming ......................................................................................................... 44
5.2.2.
Copy....................................................................................................................... 45
5.3.
5.4.
6.
Calibrations ........................................................................................................... 45
4-20 mA output adjustment for a measurement channel....................................... 48
MAINTENANCE ..................................................................................49
6.1.
6.1.1.
Periodic / preventive maintenance........................................................................ 49
On the MX48 unit .................................................................................................. 49
6.1.2.
On the detectors ..................................................................................................... 49
6.2.
6.3.
6.4.
7.
Failures: causes and remedies .............................................................................. 50
Scrapping of MX48................................................................................................ 53
List of spare and replacement parts ...................................................................... 53
DETAILED TECHNICAL CHARACTERISTICS...............................54
8.
Special Specifications for use in Potentially Explosive Atmospheres in
accordance with European Directive ATEX 94/9/EC. ....................................56
8.1.
Specifications for mechanical and electrical installation in Classified Areas...... 56
8.2.
Metrological Specifications ................................................................................... 56
8.3.
Connecting detectors other than INDUSTRIAL SCIENTIFIC detectors to the
MX48 device .............................................................................................................................. 57
8.3.1.
Device transfer curves in 0% to 100% LEL configuration.................................... 57
8.3.2.
Device transfer curves in 0% to 30.0% OXYGEN configuration......................... 58
8.3.3.
Power supply and load resistance characteristics .................................................. 58
8.4.
9.
MARKING ............................................................................................................. 58
VIEWS SPECIFIED IN THE MANUAL ..............................................60
5
1 . D E S C RI P T I O N
1.1. General
The MX48 measuring and alarm unit can be fitted with between one and 16 independent channels.
Each channel is connected to one or more detectors installed in the locations to be monitored.
The measurement that is output from the detector is displayed on the MX48 unit and compared with
alarm thresholds. If thresholds are exceeded, the unit actuates relays which can be used to control
external devices.
REMARK
The equipment of the MX48 unit comprises 1 or 2 PCBs (option), each equipped with 4 channels.
However, each channel is independent and can be connected to any type of INDUSTRIAL
SCIENTIFIC detector provided that the PCB is suitably programmed.
6
M AI N CH AR A C TE R IS T I C S
•
Wall- mounted box (500 x 340 x 89)
•
AC or DC power supply
•
4 or 8 measuring inputs for detectors
•
Display of measurement on a plasma display panel (2 lines - 16 characters)
•
One keypad with four keys on the front panel for the user
•
One keypad with four keys for maintenance (on the display unit card, accessible only by
opening the front panel)
•
One “CALIBRATION” key and one “PROGRAMMING” key for maintenance (on the
display unit card, accessible only by opening the front panel)
•
3 gas alarms per channel
- Two instantaneous rising or falling thresholds, manual or automatic clearing, with
“extractor control logic (tunnel parking application)”
-
One rising or falling threshold, automatic clearing, triggering by time delay or
average
Relaying
Total of 10 or 18 relays distributed as follows:
-
Two relays per channel, with positive or negative safety, contacts open or closed
at rest for the first two thresholds
-
One relay common to channels for third thresholds or for all alarms (buzzer
transmission), with positive or negative safety, contacts opened or closed at rest
-
One relay common to channels for faults and failures, constant positive safety
mode, contacts open or closed at rest.
•
Current output (4-20 mA) per measuring channel.
•
Common audio alarm that can be acknowledged in the case of occurrence of gas alarms.
7
1.2. the wall-mounted box
The housing of the MX48 is a wall- mounted box consisting of a back casin and a cover which can
be pivoted.
•
Dimensions: Fig. 1 (end of this manual)
•
Overall view, casing open : Fig. 2
1.3. The various printed circuit boards
•
Overall view: Fig. 2
•
Power supply board : Fig. 3
•
Measuring channel board: Fig. 7
•
Front link board : Fig. 4
(Comprising the display, the micro part, the DB9 RS223 and RS485 connector and the
keypads).
FIGURE 2 : COMPLETE SET OF BOARDS
¼ turn latches – 2 off
2 vÚrrouillages 1/4 de tour
MX48
boxMX48
Coffret
(see
Fig.
(voir
fign°1)
N¦1)
Stay
for pour
holding
up the
Compas
retenir
le couvercle en
cover
position haute
Transformateur
Transformer
keypad
ClavierOffset
dÚportÚ
Display board
N°4)
Carte afficheur
Power
supply board
Carte alimentation
(see (voir
fig. N°3)
fig N¦3)
fig.
(voir fig(see
N¦4)
First measurement
channel
PremiÞre carte
board (see
voie
fig.deN°7)
mesure
DeuxiÞme
carte
Second
measurement
voie de mesure
channel
board (see fig. N°7)
(voir fig N¦7)
(voir fig N¦7)
VUE
D'ENSEMBLE
DU MX48
OVERALL
VIEW
OF
THE MX48
open)
FIGURE 2
15
cable glands PG9
15 PG9
presses-Útoupes
(carter ouvert)
(casing
Figure N¦2
8
2 . I NS T AL L AT I O N A ND C O N NE C T I O NS
Please ensure you read the paragraph: Special Specifications for use in Potentially Explosive
Atmospheres in Accordance with European Directive ATEX 94/9/EC
2.1.
Installation: recommendations
The MX48 unit can be installed in any premises without an explosive atmosphere. They should
preferably be placed in a ventilated and monitored location (guardhouse, control room,
instrumentation room, etc.).
Attachment is to be ensured in accordance with the dimensions in Figure 1 (3 attachment points).
REMARK
In order to permit the swivelling front panel of the unit to be opened completely, allowance must be
made for opening by rotation through 90° downwards (see fig 2 – end of this manual)
Before making any connections, the unit should be switched off using the main On/Off switch
below and to the left of the FRONT circuit (see Figures 3 rep A).
2.2.
Electrical connections of the MX48 Unit (Fig. 8)
The MX48 unit is equipped with a pulse automatic device which enables to connect 24 V DC
voltage in a lack of 220 V AC voltage so we can use no expansive save power supply.
2.2.1.
Alternative power supply
-
Voltage: 230 V AC (207 to 244 V) 50/60 Hz
Maximum power: 200 VA
Maximum current in cable: 1 A
Cable: 3 x 1.5 mm² (including earth)
Location of connection terminal blocks: Fig. 8,
Protection: the phase and neutral wires are protected by time-delayed 2 A
fuses located at the rear of the power module (fig3).
Voltage: 103 to 122 V AC - 50/60 Hz on option
CAUTION
It is mandatory that the appliance must be earthed. A terminal is reserved for this purpose at the
back of the power module: see Fig. 5. This connection is required in order to ensure correct
operation of the following:
-
mains power interference filter,
protective devices against electromagnetic interference.
9
2.2.2.
-
2.3.
DC power supply
Voltage: 21 to 30 V continue. The "- " from continue power supply is linked to
earth (and earth being linked to frame).
Maximum power: 150 W
Maximum current in cable: 6.3 A
Cable: 2 x 2.5 mm²
Location of terminal block: see Fig. 8, item D
Protection: by two fuses located at the back of the power module (Fig. 3)
Detectors (Figure 12)
REMARK
-
The detectors are linked by SHIELDED cables.
The utilization of shielded cables is MANDATORY
The earth braid of shielded cables must be connected to the earth at one end
only.
CAUTION
Each channel is configured in the factory for a given type of detector (explosive gas, toxic
gas, fire or flame). If two different types of detector are interchanged, this may result in
the destruction of the central unit or of the detector.
2.3.1.
Explosimetric detectors of PONT type
Three connecting wires for a shielded cable.
Resistance of detector / unit cable : 16 ohms maximum per wire, i.e. 32 ohms in loop (1 km for cable
3 x 1.5 mm²).
Connection on MX48 unit: see Fig. 10 – Example 1
2.3.2.
3-wire detectors 4-20 mA: 3 connecting wires for shielded cable
-
Resistance of detector / unit cable: 16 ohms maximum per wire, i.e. 32 ohms in loop
(1 km for cable 3 x 1.5 mm²).
-
Connection on MX48 unit: see Fig. 10. – Example 2
10
2.3.3.
2-wire detectors 4-20 mA: 2 connecting wires for shielded cable
-
Resistance of detector / unit cable: 32 ohms maximum per wire, i.e. 64 ohms in loop
(2 km for cable 2 x 1.5 mm²).
-
Connection on MX48 unit: see Fig. 11. – Example 2
2.3.4.
FIRE detectors: 2 connecting wires for shielded cable
The current commercial designations are as follows:
-
“Thermovelo” detectors of type EC 11 (sensitive to temperature variations)
Ionic detectors of type EI 1 100 (sensitive to smoke)
Optical detectors of type EO 1 100 (sensitive to smoke)
-
Resistance of detector / unit cable: 28 ohms maximum per wire, i.e. 56 ohms in loop (2 km for
cable 2 x 1.5 mm²)
-
Fire detectors can be detected in parallel to a maximum of five. The end-of- loop resistor
(2.7 K) is to be placed at the end of the line on the last detector.
-
Connection on MX48 unit: see Fig. 11. – example 1
2.3.5.
FLAME detectors: 2, 3 or 4 connecting wires for shielded cable
depending on utilization
11
REMARK
The detectors can be supplied with power either via the MX48 unit or by an auxiliary 24 V DC
source.
These detectors can operate in standalone mode:
24 V DC power supply and direct utilization of relay contacts in accordance with the
technical specification corresponding to the detector used.
The current commercial designations are as follows:
-
model 20/20 U - analog - type UV - 752002 (sensitive to UV radiation)
model 20/20 UC - analog - type UV (sensitive to UV radiation)
model 20/20 UB - µP technology - type UV - 772002 (sensitive to UV radiation)
model 20/20 UBC - µP technology - type UV (sensitive to UV radiation)
model 20/20 LC - analog - type UV/IR (pyroelectric, combination of UV and IR
detectors)
model 20/20 LBC - µP technology - type UV/IR (pyroelectric, combination of UV and
IR detectors)
model 20/20 I - µP technology - triple IR detector - 780002 (pyroelectric, sensitive to IR
radiation)
These detectors are equipped with various types of terminal block (see table below).
Model
Type
of terminal
block
-
20/20 U
20/20 UC 20/20 UB 20/20 LC 20/20 UNC 20/20 LBC 20/20 I
B
C
A
C
C
C
A
Resistance of cable / unit
- In the case of local 24 V DC power supply:
8.5 ohms maximum per wire, i.e. 17 ohms in loop
- In the case of power supply via the MX48 unit:
3 ohms maximum per wire, i.e. 6 ohms * in loop
∗ 4 ohms for detector 20/20 I (IR3)
-
Connection on MX48 unit (ONE detector per measuring channel ONLY):
-
detector equipped with a terminal block of type A: see Fig. 13
detector equipped with a terminal block of type B: see Fig. 14
detector equipped with a terminal block of type C: see Fig. 15
Example of the utilization of the 4-20 mA signal from flame detectors equipped with connectors of
type A or C: see Fig. 16.
Example of the utilization of detectors equipped with connectors of either type A or type B and with
auxiliary power supply. The auxiliary power supply must be able to supply power to the number of
detectors planned in the measuring loop (see Fig. 17).
12
REMARK
In the case of this application, the maximum of five flame detectors can be connected in the
measuring loop.
Example of the utilization of IR3 or UV/IR detectors equipped with connectors of type A with a
local junction box and galvanic insulation (see Fig. 18).
2.3.6.
CO2 detector of type “Ventostat VT”
-
Connection on MX48 unit: see Fig. 20.
-
Resistance of detector/unit power cable: 12 ohms maximum per wire, i.e. 24 ohms in
loop.
-
4-20 mA output: maximum load = 280 ohms (whole loop)
2.3.7.
Specific case of intrinsic safety detectors
Two types of intrinsic safety barrier can be used: Z787 / EX and MTL787S+.
PRECAUTIONS
Before connecting the barrier to the unit, check that the voltage is < 25 V DC.
-
A short circuit in the electrical connections will result in destruction of the barrier.
-
Perform wiring in the DE-ENERGIZED state.
-
The electrical link between the MX48 unit and the clipper is made using a screened
cable with two active conductors with a maximum resistance of 12 ohms each.
13
REMARK
In classified areas, the installation must comply with the standards in force.
-
Connections on MX48 unit: see Fig. 21.
IMPORTANT
All intrinsic safety installations must be APPROVED as a whole assembly by an approved
organization (DRIRE, etc.).
INDUSTRIAL SCIENTIFIC “INTRINSIC SAFETY” BARRIERS
Type of IS
barrier
Reference
Z787 / EX
6184703
MTL787S+
6797100
2.3.8.
Specific features
To be fitted on DIN
RAIL
To be fitted in an
approved box:
MANDATORY
INDUSTRIAL
SCIENTIFIC
box reference
For 2 clippers
6797192
For 5 clippers
For 12 clippers
6797547
6797101
Other detectors with standardized current output
Any detector (with 2 wires or 3 wires) that can be supplied with power between 19 V DC and 32 V
DC and that supplies a standardized current (signal) of between 4 and 20 mA can be connected to
the MX48 unit.
The connection requirements are identical to those for the corresponding INDUSTRIAL
SCIENTIFIC detectors (see Fig. 22).
2.3.9.
Parking application
CTX300 "Co parking" toxic gas detectors can be fitted in parallel when a mean gas concentration is
to be obtained. The detectors must, imperatively, be located in the same area. In this case, a
maximum of five detectors can be connected (see Fig. 23).
14
2.4.
Connecting the unit to external devices
2.4.1. Slaving controls
The 8 measuring channels of the MX48 unit are each equipped with two relays which can be used
to control external devices: sirens, solenoid valves, extractors, telephone calls, etc..
For each measuring channel, the relays are distributed in the following manner (see Fig. 7):
-
a relay associated with the triggering of alarm 1 (fig 7),
a relay associated with the triggering of alarm 2 (fig 7),
use of open or closed contacts selected with a jumper (see Fig. 7 – item A),
use of positive or negative safety selected by programming (see the CHANNEL
programming menu),
contact outputs on the back of the measuring board (see Fig. 12).
An example of connection is given in Fig. 24:
- a siren connected to relay AL1 will be actuated as soon as alarm 1 is triggered,
- a solenoid valve connected to relay AL2 will be actuated as soon as alarm 2 is
triggered.
For all channels:
-
A common relay associated with the triggering of alarm 3 for the 8channels (fig 3).
By programming, this common relay can also be used for the remote transmission of the
audio warning signal. (This relay will then be associated with all the unit’s alarms).
-
A fault relay associated with the triggering of channel faults (detector failures, electrical
connections, excessively negative zero, etc.). This relay will always be in positive safety
mode (see Fig. 3).
-
The use of open or closed contacts is selected by programming on common board (see
Fig. 3).
-
Common relay contact outputs on the back of the power module: Fig. 8.
REMARK
Owing to the breaking capacity of the MX48 unit’s relays which is limited to 2 A / 250 V AC or 30
V DC, external intermediate relays must be used if the devices to be controlled require high power
levels.
The relay contacts are indicated : unit switched off
15
2.4.2. 4-20 mA current outputs (Fig. 12)
For each measuring channel, the MX48 unit is equipped with a 4-20 mA output that can be used to
retransmit measurements to a recorder or an external PLC. The maximum resistance in loop mode is
600 ohms. The earth connections for the 4-20 mA outputs are common and the unit. The 4-20 mA
lines are not galvanically insulated one from the other. The current output varies according to the
measurement and has several states, as follows:
-
On starting up the unit: I < 1 mA
With FAULT: I < 1 mA
In MAINTENANCE mode: I = 2 mA
ZERO MEASUREMENT: I = 4 mA
Full scale: I = 20 mA
Out of range or “in doubt”: I > 23.2 mA
An example of the connection of a multi- channel recorder is given in Fig. 25.
2.4.3. RS 232 and RS 485 outputs
RS232 OUTPUT
A computer can be connected on a female sub.D/DB9 type connector located on the back of the
micro board (fig 4 repA). The MX48 programming, from outside, will be possible thanks to this
connection.
RS 232 OUTPUT USING
-
Remove the DB9 connector (plug with an internal strap)
Connect a link cable ref.6315831 which will link the monitor to the computer on the
MX48 available female connector DB9 (Fig 6)
MX48
Female DB9
PC COMPUTER
-
Male DB9
when the using is stopped : no connect the cable and put the male DB9 "plug" again.
16
RS 485 OUTPUT (PINABLE ON FIG 8)
Several MX48 units can be linked to a single computer, which is the "master" of the network. In
this case, a "SLAVE NUMBER" (by programming/unit) is asigned to each MX48 unit.
This RS 485 output can be galvanically insulated as an option.
1st case : no galvanic insulation
-
no mounted insulation component
2 polarization electrical resistances are welded and programmed with J103 and J104 pins
2nd case : with galvanic insulation
-
mounted and welded insulation component
no programmed polarization electrical resis tance for "plus" (+ 5V) (J104 programming
pins)
a) with RS 485 shielded
-
no programmed polarization resistor for "moins" (GND) (J103 programming
pins)
b) without RS485 shielded
-
programmed polarization resistor for "moins" (GND) (J103 programming pins)
End loop resistor
It is located on the MX48 micro board and must be programmed with the last MX48 unit of the
loop (by pins) with a 120 Ohms value.
The MX stored data are some instantaneous values
The RS485 output is a half duplex type.
RS 485 OUTPUT USING
-
No change the sub D/DB9 "plug" connector (fig 4 – item A)
-
Connect the screwed connector terminals 3, 4 and 5, located on the power supply board
of the MX48 unit. See connection details fig 8.
-
Owing to mounted wires or not (following the mounting and the equipment linked or not
on the earth…).
17
IMPORTANT
All details regarding the RS 485 complete description (Modbus / Jbus format, structures,
adresses aso…) are developped in a leaflet ref. D 813 577.
CAUTION
A computer or a printer management interface must be used in order to printout the data stored by
the MX48 unit. See details and possibilities in a leaflet ref. 8 813 571.
2.4.4. Remote acknowledgement
It is possible to allow remote acknowledgement by connecting on terminals clear 1 and clear 2 (loop
= 16 mA), of the connector located on the power supply board : see fig 8.
Maximum load impedance : 1 K?
Remark : several MX48 units can be connected to the same remote acknowledgement system
provided that the polarities are respected.
Transformer terminal
Power supply
terminal
Clear and RS485
terminal terminal
18
3 . S T ART I NG UP
3.1. Checking the installation
It is checked that, at least, all connections have been made and that the complete installation
complies with current standards in force.
CAUTION
INDUSTRIAL SCIENTIFIC is not responsible for the compliance of the complete
electrical safety system.
The MX48 unit is switched on by means of circuit breakers * provided for that purpose and which
ensure protection of the mains power unit.
* The circuit breakers are to be selected according to the power consumption levels specified by the
manufacturer and the length of the electric cables.
3.2. Switching on the unit
CAUTION
The handling operations and adjustments described in these paragraphs are strictly
reserved for authorized personnel as they are liable to affect detection safety.
To start up the MX48 unit, you must:
-
swivel the front panel,
press the ON/OFF button located to the bottom left-hand side of the FRONT
circuit: see Figures 3 (item A).
The display panel then shows, for example:
MX 48/52 V1.0
The unit then goes into INITIALIZATION mode for one minute. Consequently, all the alarms are
inhibited and the current outputs are 1 mA for the channels in service. The unit then performs a selftest * on its buzzer and all its night-emitting diodes. At the end of this one- minute period, the
channels in service return to normal operation and the corresponding alarms and relays are enabled.
19
* The user can carry out a “manual-self test” by pressing the test key at any time (see Fig. 26).
This self-test lasts 20 seconds and the display panel may show the following displays one after the
other, for example:
MX 48/52 V1.0
xx LEL CH4
Line corresponding to
the channel displayed
when the ENTER key
was pressed
then
*** SELF-TEST ***
xx LEL CH4
The user can interrupt the self- test cycle before it is completed by pressing
ACKNOWLEDGEMENT key of the front panel keypad.
the
3.3. Operating modes
3.3.1. Audio warning device (buzzer)
In normal operation, the audio warning device is triggered whenever a fault or an alarm appears.
The audio warning device can be stopped by pressing the ACKNOWLEDGEMENT key or by
remote acknowledgement. The buzzer makes a continuous or discontinuous sound (according to the
programming of the unit) if an alarm threshold is exceeded.
3.3.2. Light-emitting diodes (LED) (Fig. 1 and fig 4)
Each channel is equipped with five LEDs (visible and identified on the FRONT panel).
LED
Extinguished
GREEN
Channel not in
service
1st red
AL1 not triggered
2nd red
AL2 not triggered
3rd red
AL3 not triggered
Yellow
No fault
Illuminated
in steady mode
Channel in service
Threshold AL1 exceeded
(automatic clearing)
Flashing
Threshold AL1 exceeded
(manual clearing) and not
acknowledged
Threshold AL2 exceeded
(manual clearing) and not
acknowledged
Threshold AL2 exceeded
(automatic clearing)
Threshold AL3 exceeded by mean
or time (automatic clearing)
Fault on channel
-Channel being calibrated or
programmed
- Detector being calibrated
20
3.3.3. Alarm thresholds
Each of the three alarm thresholds can be programmed independently for each channel. (See the
“Channel programming” menu).
In normal operation, a gas alarm is only triggered after a preprogrammed time delay in order to
avoid spurious alarms.
Alarm thresholds can be processed in the following manners:
-
in normal cycle with manual clearing: block diagram 1,
in normal cycle with automatic clearing: block diagram 2,
in parking cycle: block diagram 3.
The alarm thresholds are to be selected according to the gases detected and the corresponding
standards in force.
Special case: A channel connected to a fire detector
-
It is MANDATORY to select the scale with 100 divisions.
It is MANDATORY to select the alarm threshold with 60 divisions.
(Owing to the end-of-loop resistor of 2.7 kΩ, the fire detector outputs 4 mA when no fire is detected
and 20 mA if a fire is detected).
21
BLOCK DIAGRAM 1
NORMAL CYCLE WITH MANUAL CLEARING
START
No
Threshold
exceeded
Yes
Illumination of flashing
alarm LED
Yes
Time T1
exceeded
Illumination of flashing
alarm LED
After T2 time
Relay engaged
Buzzer engaged
Alarm
acknowledged
No
Alarm
acknowledged
Yes
LED extinguished
Relay disengaged
Buzzer stopped
Yes
LED steady mode
Buzzer stopped
END
22
No
No
BLOCK DIAGRAM 2
NORMAL CYCLE WITH AUTOMATIC CLEARING
START
No
Threshold
exceeded
Yes
Yes
Alarm LED illuminated
in steady mode
LED extinguished
Relay disengaged
After T2 time
Relay engaged
Buzzer engaged
END
23
Time T1
exceeded
No
BLOCK DIAGRAM 3
PARKING CYCLE
Alarm 3 operates in the same way as the normal cycle.
The times defined for alarms 1 and 2 (time delays) are, in this case, used to define the minimum
operating time for each relay.
t AL1
tR1 R2
t AL2
Threshold AL2
Threshold AL1
Starting of
relay R1
tAL1
tAL2
tR1 R2
Stopping Starting of
of relay R1 relay R2
Stopping of
relay R2
min.
t1
Min. operating time for alarm 1
(defined for each channel)
Min. operating time for alarm 2
(defined for each channel)
Switching time from relay 1 to relay 2
(defined for the whole unit)
t2
tR1 & R2
24
3.3.4. Fault thresholds
Processing of detector faults
Each channel detects the following faults.
For toxic and explosive gas detectors:
-
line interrupted (0 mA),
line short-circuited or excessive consumption,
negative offset (more than 20% of measuring scale),
line in calibration mode (2 mA) (if confirmed by programming).
For detectors of the explosive gas type (4-20 mA and 340 mA) in normal mode and if the
measurement is greater than 100% of the measuring scale, there are the following immediate
results:
-
Display: SUP
The relays are actuated if the thresholds are reached.
The general fault relay is actuated.
The 4-20 mA output of the channel is greater than 20 mA.
All these states are memorized and the only way of acknowledging them is to
switch off the channel and then restart it.
Faults are valid after a preprogrammed time (in the same way as alarms).
FAULT BLOCK DIAGRAM
START
Wait until the fault has been present
for at least 5 seconds.
The relays are locked in their current state.
The common fault relay is engaged.
The buzzer is engaged.
The channel fault LED is illuminated. *
1 mA is sent on the 4-20 mA output.
END
* The LED is extinguished as soon a the fault disappears.
25
3.3.5. Measuring unit
One minute after starting up, and if no test action is performed on the keypad, the unit successively
scans all the channels in service and displays the measured values.
Examples of display
Channel 1
x x LEL CH4
OR
Channel 2
x x x ppm CO
-
Each channel is interrogated for 10 seconds.
-
The user can interrogate a channel manually by selecting that channel with the + and keys to obtain a manual display for one minute.
-
The user can return to normal cyclic scanning during that one-minute period by
simultaneously pressing the + and - keys. The display panel then shows alternating
displays, three times in succession:
For example:
Channel 5
x x x ppm CO
then
normal scan
x x x ppm CO
26
4 . UT I L I Z A T I O N
4.1. List and functions of the various items of “USER” equipment for
programming and calibration of the unit
4.1.1. Keypads
The first is equipped with four touch keys accessible without opening and swivelling the MX48
unit’s FRONT panel, the second is equipped with the same keys accessible by opening and
swivelling the FRONT panel for maintenance (Fig 4 rep B).
NORMAL MODE
-
Manual display of previous channel
Combined with the “PLUS” key to restart the channels
automatic display cycle.
MAINTENANCE MODE
-
Manual display of previous channel
Decrease value, threshold, etc.
Display of previous choice (onáoff, etc.)
NO
NORMAL MODE
-
Manual display of next channel
Combined with the “MINUS” key to restart the
channels automatic display cycle.
MAINTENANCE MODE
-
Manual display of next menu
Increase value, threshold, etc
Display of next chooice (onáoff, etc)
YES
27
- “Audio and visual” or “audio” clearing of an alarm
- Exit from a current menu
- Start a self- test manually
- VALIDATE
4.1.2. Maintenance keys
PROGRAMMING key (Fig 4 item D): accessible after opening and swivelling the front panel.
-
Combined with the “-” key to go back in a menu.
To quit normal display mode and access the various menus (see block diagram of
the various menus).
To scroll through a menu.
CALIBRATION key (Fig 4 item C) : accessible after opening and swivelling the front panel.
-
To set a channel to CALIBRATION mode.
To quit that mode.
4.1.3. Potentiometers
Each measuring channel has 5 potentiometers. These are accessible by opening and swivelling the
FRONT panel of the MX48 unit and are laid out as follows (see Fig. 5):
1 detector ZERO potentiometer
1 detector sensitivity potentiometer
1 potentiometer 4 mA / current output
1 potentiometer 20 mA / current output (for full scale)
1 potentiometer filaments power supply (340 mA)
28
4.2. Menus
4.2.1. The various menus and their functions
The MX48 unit has five menus that are accessed by pressing the “Programming” key (item D, Fig.
4).
These five menus are as follows:
DESIGNATION
“CHANNEL” programming
“SIMULATION” programming
“CHANNEL COPY” programming
“UNIT” programming
“UPLOADING” programming
FUNCTION
- To program the whole configuration of a measuring
channel (ON/OFF, range, alarm thresholds, etc.)
- To artificially vary a channel measurement on:
- the display panel,
- the 4-20 mA current output.
- To trigger the alarms (LED and relays) at the same
time.
- To copy the complete programming from one channel
to another (time saving)
- To program the whole configuration of the MX48 unit
(language, slave number, etc.).
Do not use this mode (re-programming of the MX48
unit).
4.2.2. Block diagram of the scrolling of the various menus
It is easy to use these various menus by means of the keys on the keypad and the “Programming”
key (Fig 4).
Detailed flow diagrams of the menu scrolling function and of each menu are given on the following
pages.
29
SCROLLING OF THE VARIOUS MENUS
NORMAL
DISPLAY
P
+
Programming
[Channel x x]
-
+
Programming
Simulation
-
+
Programming
Channel xx copy
REMINDER
Programming key
P
+
Keys used to move
30
-
+
Programming
Unit
-
Programming
Uploading
4.2.3. Detailed flow diagrams of each menu
CHANNEL PROGRAMMING
Remove on the programming socket before entering into programming
Seuil
Alarme 1
NORMAL
[25]
DISPLAY
P
Programming
[Channel xx]
: last channel displayed
P
Channel xx
[Off]
:
Off
+
←
→
On
-
then
ENTER
P
Measuring range
[100..]
: CHOICE OF RANGES
10 30 100 300 1000 2000
xxxxU
+ → + → + → + → + → + then
ENTER
P
Decimal point
[1...]
: SELECTION OF POINT POSITIONING
100 10.0 1.00 0.100 0.010 0.001
+ → + → + → + → + then
P
Alarm 1 threshold
[25]
: 0 to 2000
←
+
→
-
then
ENTER
: 0 to 2000
←
+
→
-
then
ENTER
P
Alarm 2 threshold
[50.]
31
ENTER
P
Alarm 3 threshold
[75]
: 0 to 2000
←
+
→
-
then
ENTER
P
Alarm 1
[Increasing]
: Increasing
Decreasing
←
+
then
→
ENTER
: Increasing
Decreasing
←
+
then
→
ENTER
: Increasing
Decreasing
←
+
then
→
ENTER
: Normal
-
ENTER
P
Alarm 2
[Increasing]
P
Alarm 3
[Increasing]
P
Cycle
[Normal]
P
32
←
→
Parking
+
then
Ack alarm 1
[Manual]
: Manual
-
←
→
Automatic
+
then
ENTER
: Manual
-
←
→
Automatic
+
then
ENTER
P
Ack alarm 2
[Manual]
P
Alarm 3
[Time delay]
: Time delay
-
←
→
Mean
+
then
ENTER
: Negative
-
←
→
Positive
+
then
ENTER
P
Relay 1 safety
[Negative]
P
33
Relay 2 safety
[Negative]
Negative
Positive
←
+
then
→
ENTER
P
Relay 1
[Free]
Free
-
←
→
Set to 0
+
←
→
Set to 1
+
then
ENTER
Free
-
←
→
Set to 0
+
←
→
Set to 1
+
then
ENTER
Free
-
←
→
Set to 0
+
←
→
Set to 1
+
then
ENTER
Free
-
←
→
Set to 0
+
←
→
Set to 1
+
then
ENTER
P
Relai 2
[Free]
P
Relay 3
[Free]
P
Fault relay
[Free]
34
P
The MX48 unit can detect and indicatez (with a flashing
yellow LED) that a line has-been placed in
CALIBRATION mode on the detector.
Cal detection
[No]
No
-
P
Channel xx
[Premises 1 channel] U
flashing
P
Gas
[CH4]
←
→
Yes
+
then
ENTER
Free display: A channel heading can be programmed
(in 13 characters maximum). By default, the channel
number is displayed in this area.
+
←
→
-
then
ENTER
CH4
-
←
→
CO
+
←
→
2S etc.
+ then
ENTER
LEL
-
←
→
%
+
←
→
ppm etc.
+ then
ENTER
P
Units
[LEL]
P
Alarm 1 time
[00:00:00]
H
mn
sec
Time: Time interval between the triggering of the AL
LED and of the corresponding relay, or the minimum
operating time of the relay in parking mode.
←
+
then
ENTER
→
P
Alarm 2 time
[00:00:00]
H
mn
Display of time by using keys
←
+
then
→
ENTER
Texte
←
→
ENTER
sec
P
Alarm 3 time
[00:00:00]
H
mn
sec
P
35
+
then
Detector type
[Explosive]
(Bridge)
(4-20 mA) (1)
: Explosive
Toxic
←
+
→
P
←
→
(Fire)
(2)
Spec. tox.
+
then
ENTER
End of menu
(1) in case of "Up" fault : 3 "gas" alarms and fault alarm are triggered.
(2) In case of "Up" fault : only the fault alarm is triggered.
INFORMATION
This key can also be used to exit from the current menu.
When in a menu, you can go back (to make checks or modifications,
etc.) by pressing and holding Programming key and by successively
pressing and releasing the down key - .
-
P
[
]
Parameters specified in square brackets [ ] are the VALID parameters
(in memory).
(1) Free
This means that the relay can be activated when programming alarm
thresholds are triggered.
Set to 0
This means that the relay is not powered supply, and will not be
activated by MX48 control unit with alarm..
Set to 1
This means that the relay is always powered supply (by the MX48
control unit), and neither will not be activated by MX48 control unit
with alarm. Using of relays will be directly programmed by J-BUS
input and "COM52" software.
36
LIST OF UNITS
DESIGNATION
MEANING
LEL
Lower explosive limit
%
Percent
ppm
parts per million
ppb
parts per billion
UEG
Unter Explosion Grenze (= LEL in German)
LEL
Limite inférieure d’explosivité (= LEL in
French)
bar
unit of pressure
mb
unit of pressure (millibar)
Rh
relative humidity
m/s
metres per second
mg
unit of weight (milligram)
unit + flashing U
free indication of unit
-
37
←
→
+
then
ENTER
LIST OF GASES
DESIGNATION
MEANING
Methane
Carbon monoxide
Hydrogen sulphide
Nitrogen
Nitric oxide
Nitrogen dioxide
Sulphur dioxide
Chlorine
Hydrogen
Hydrochloric acid
Hydrocyanic acid
Ammonia
Ethylene oxide
Phosphine
Hydrofluoric acid
Freons
Carbon dioxide
Arsine
Silane
Butane
Propane
Natural gas
Ethylene
Pentane
Hexane
Propylene
Acetylene
Ethanol
Acetone
Propylene oxide
Ethylene oxide
Isobutane
Dichloromethane
Ethyl alcohol
2-Butanol
Isopropanol
Xylene
Toluene
Petrol (gasoline)
Butadiene
Hydrogen
Free indication of name of gas:
←
+
then
ENTER
→
CH4
CO
H2S
N
NO
NO2
SO2
CI2
H2
HCL
HCN
NH3
ETO
PH3
HF
CFC
CO2
ASH
SiH4
BUT
PRO
GNT
ETY
PNT
HEX
PRY
ACY
ETA
ACO
OPR
OET
ISB
DIM
AET
BUN
ISP
XYL
TOL
ESS
BUD
HYD
Gas + flashing U
38
SIMULATION PROGRAMMING MENU
NORMAL
DISPLAY
P
+
Programming
[Simulation xx]
ENTER
Programming
[Simulation xx]
P
Free labelled area
LEL CH4 S
S = flashing to indicate that this channel is in
simulation mode.
Channel xx
-
Simulation on previously displayed and
[validated] channel
←
→
+
ACK
To artificially vary measurement on the display
panel, on the 4-20 mA output, and trigger alarms
(LED and relays)
= ESCAPE (ECHAPPE)
To exit from this menu and return to normal
operation
END OF MENU
39
COPY PROGRAMMING
NORMAL
DISPLAY
P
+
+
Programming
Copy channel xx
Last channel displayed
ENTER
Validation of menu
Programming
[Copy channel xx]
Validation of channel to be copied
P
: Copy the channel’s configuration to
another channel
Copy channel
[Channel xx => xx]
xx = indication of “Other channel
number” using keys - ←
+
→
ENTER
: Validation of copy
Copy channel
[Channel xx => xx]
END OF MENU
40
UNIT PROGRAMMING
NORMAL
DISPLAY
P
+
+
+
Programming
Unit
ENTER
Programming
[Unit]
Validation of menu
P
Language
[French]
Choice of languages:
: French English German Spanish
+ → + → + then ENTER
P
Speed
[9600••]
Choice of transmission speed with
computer:
1200 240048009600 19200 Bauds
+ → + → + → + then ENTER
P
Slave address
[1]
P
41
Choice of slave address (this unit)
0 to 250
+ → then ENTER
Response time
[00 : 00 : 00]
H mn sec
This is the time interval between exceeding of the
AL threshold and triggering of the corresponding
visual alarm (LED).
Display the time using keys:
- ←
→ + → then ENTER
P
Relay 1&2 stop T
[00: 00 : 00]
H mn sec
In “Parking” mode: this is the time interval between
stopping of relay 1 and starting up of relay 2.
Display the time using keys:
- ←
→ + → then ENTER
P
Relay safety
[Negative]
Negative Positive
- ←
→ + → then ENTER
P
Buzzer transferred
[NO]
Control of relay 3 (common) by any triggering of
buzzer
NO
YES
←
- → + → then ENTER
P
Buzzer connected
[NO]
Utilization of common audio alarm (buzzer)?
(Function in series with buzzer jumper)
NO
YES
←
- → + → then ENTER
P
Continuous buzzer
[NO]
END OF MENU
YES = If copy of buzzer on alarm 3 and with buzzer
option into service : audible alarm will be triggered
when there is an alarm.
NO = The common audible alarm (buzzer) will be
triggered for a 30 seconds maximum time (even
there is an alarm).
-
42
←
→
+ → then ENTER
UPLOADING PROGRAMMING
Only INDUSTRIAL SCIENTIFIC personnel and personnel approved by INDUSTRIAL
SCIENTIFIC can be made this operation.
NORMAL
DISPLAY
P
+
+
+
+
Programming
Uploading
ENTER
Programming
[Uploading]
Display of menu
Validation of utilization of
menu
Display of menu
confirmation
P
Uploading
Confirm
Data transfer request
ENTER
Validation of data transfers
Uploading
[Confirm]
Confirmation of uploading
END OF MENU
43
5 . SE T T I NG T HE M X4 8 U NI T I NT O S ER VI C E
REMINDER
The handling operations and adjustments described in this chapter must be performed by
authorized personnel only, as they are liable to affect detection safety.
Once the measuring unit has been switched on, it can be programmed (1), its measuring channels
can be programmed (1) according to the detectors used and calibrations can be made on the unit and
detectors.
(1) These programming operations can be carried out directly on the MX48 unit in accordance with
the following procedures or using a computer equipped with the “com 52” software.
5.1. Programming the unit
To program the MX48 measuring unit, and according to the required specifications, the “Unit
programming” menu must be used (see Section IV-2 on Menus) by means of the keypad and the
“Programming” key. Then, the instructions in the menu should simply be followed.
CAUTION
If the unit remains in programming mode for more than 30 minutes, it automatically switches to
fault mode.
5.2. Programming the measuring channels
5.2.1. Programming
To program each measuring channel according to the type of detector used and the required
specifications, the “Channel programming” menu must be used (see Section IV-2 on Menus) by
means of the keypad and the “Programming” key. Then, the menu instructions should simply be
followed.
REMARK
When a channel is switched on, all its relays are in “off” mode and its current output is 1 mA. Then,
one minute later, the channel comes into effective operation (relays ready and output of 4-20 mA).
CAUTION
If a channel remains in programming mode for more than 30 minutes, it is automatically switched
to fault mode.
44
5.2.2. Copy
In order to make the programming of ALL CHANNELS less TIME-CONSUMING when the same
programming is required for a number of channels, it is recommended that the “COPY” menu
should be used (see Section IV-2 on Menus) by means of the keypad and the “Programming” key.
Then, the instructions in this menu should simply be followed.
5.3. Calibrations
Gas detection instruments are potential life-saving devices. Recognizing this fact, Industrial
Scientific Corporation recommends that a functional “bump” test be performed on every fixed gasmonitoring instruments as part of a regular maintenance program. A functional test is defined as a
brief exposure of the detector to a concentration of gas(es) in excess of the lowest alarm set-point
for each sensor for the purpose of verifying sensor and alarm operation and is not intended to be a
measure of the accuracy of the instrument.
Industrial scientific further recommends that a full instrument calibration be performed using a
certified concentration(s) of calibration gas(es) quarterly, every 3 months.* Calibrations may be
necessary more or less frequently based, for example, on application, field conditions, exposure to
gas, sensor technology, and environmental conditions. The frequency of calibration is best
determined by company policy or local regulatory agencies.
If an instrument fails to operate properly during any functional “bump” test, a full instrument
calibration should be performed successfully prior to use.
These recommendations are based on safe work procedures, industry best practises, and regulatory
standards to ensure worker safety. Industrial scientific is not responsible for setting safety practices
and policies.
* For new installations it may be prudent to carry out bump tests frequently at first (perhaps
weekly), increasing the time intervals (to, perhaps, monthly or more) as confidence grows with
experience in the installation concerned, on the basis of the maintenance record.
Case 1
Measuring channel connected to a detector with no integrated electronics (explosive gas
detector).
• Prepare the detector for calibration:
-
Calibration consists in adjusting the detector ZERO in PURE AIR and its sensitivity to
the STANDARD GAS.
-
If the detector zero is set with natural diffusion in pure air, the surrounding atmosphere
must be calm (wind speed of less than 1 m/s).
REMARK
The authorized wind speed is increased to 4.1 m/s when the detector is fitted with a weather
protective device.
• Prepare the measuring channel for calibration:
-
Open and swivel the front panel of the MX48 unit.
45
-
Manually set the channel to be calculated using keys + and - on the MX48 keypad
(item B, Fig. 4).
-
Press the CALIBRATION key (item D, Fig. 4).
-
At the bottom right-hand side of the display panel, the letter C flashes and the yellow
LED for the relevant channel flashes, indicating that the measuring channel is in the
“CALIBRATION” position.
REMARK
When a measuring channel is in the CALIBRATION position, all the alarm relays are inhibited (in
order to avoid interfering with the slaving control networks) and the corresponding current output is
maintained at 2 mA.
-
Turn the sensitivity potentiometer five times in the clockwise direction (using a
screwdriver).
-
Adjust the DETECTOR ZERO.
NOTE
If the ambient air is not pure, inject air using a “synthetic air” cylinder and the gas injection pipe or
a remote calibrating fixed device with a flow rate of 60 litres per hour for 25 seconds directly on the
detector or a flow rate of 170 litres per hour for 1 min 45 s using a remote calibrating fixed device.
As soon as the signal is stable on the MX48 display panel, adjust the “MEASUREMENT ZERO”
by adjusting the ZERO potentiometer (Fig. 5) and corresponding to channel to be set up, so as to
read ZERO on the MX48 display panel.
• Adjust the detector sensitivity:
-
Inject the calibration gas using the gas injection pipe (or a remote calibrating fixed
device) in the same conditions as those applicable for the synthetic air (zero adjustment).
When the measurement has stabilized, set the value corresponding to the reference gas
concentration on the display panel of the MX48 unit by adjusting the sensitivity potentiometer for
the relevant channel (Fig. 5).
NOTE
For this category of explosive gas detectors, the unit’s display panel indicates 100 DIVISIONS for
100 LEL of an explosive gas.
Example:
If the reference gas is a 2.5% methane concentration, i.e. 50% LEL of methane, adjust to obtain a
display of 50 DIVISIONS.
46
Formula:
Maximum scale
100 DIV x n% LEL of standard gas
Number of divisions to be set =
100% LEL
Maximum LEL
-
Stop the injection of the standard gas, wait for the measurement to return to zero (on the
MX48 display panel). Then, press the "CALIBRATION" key (item C, Fig 4). The
flashing yellow LED is extinguished and the "C" on the display panel disappears. The
measuring channel now operates normally an calibration has been completed.
Case 2
Measuring channel connected to a detector with no integrated electronics and supplying a
standardized 4-20 mA current. (CTX50, CTX100, CTX200, CTX870, etc.).
• Prepare the detector for calibration:
-
See the remarks for zero adjustment in pure air and natural diffusion as in case 1.
-
These types of detector (4-20 mA) often have a “CALIBRATION” position (CTX870,
CTX100, etc.) or a calibration menu (CTX2042, COX2040, etc.).
This position has the effect of transmitting a 2 mA current from the detector to the
measuring unit.
-
This prevents the triggering of alarms (and slaving controls) during calibrating
operations.
CAUTION
If the detector and the measuring channel are calibrated at the same time, the detector
must be left in normal operating mode but the MX48 unit must be set to calibration mode
in order to inhibit the relays.
⇒ Consult the technical manual for the detector concerned.
-
Open the detector (with integrated electronics) in order to gain access to the 4 mA
adjustment and sensitivity (20 mA) potentiometers and to the terminals used to check its
4-20 mA output current.
-
With these types of detector, there are two ways of checking the current supplied to the
unit:
o by direct reading on the local display panel (internal to the detector)
o by measurement of current on the terminals provided for that purpose (see the
manual for the detector concerned).
-
Prepare the measuring channel for calibration:
-
same operations as in case 1.
47
• Adjust the detector zero.
NOTE
If the ambient air is not pure, inject air using a “synthetic air” cylinder and the gas injection pipe or
a remote calibrating fixed device with a flow rate of 60 litres per hour for 25 seconds directly on the
detector or a flow rate of 170 litres per hour for 1 min 45 s using a remote calibrating fixed device.
As soon as the signal is stable on the local display panel on the detector or with regard to the current
output (4-20 mA), adjust the DETECTOR ZERO by adjusting the detector internal ZERO
potentiometer (see the manual for the detector concerned).
Then, CONSECUTIVELY, adjust the measurement zero by acting on the ZERO potentiometer for
the measuring channel (Fig. 5) so as to read ZERO on the MX48 display panel.
• Adjust the detector sensitivity:
-
Inject the calibration gas using the gas injection pipe (or a remote calibrating fixed
device) in the same conditions as those applicable for the synthetic air (zero adjustment).
When the measurement has stabilized (on the local display panel or on the detector internal
terminals (current measurement)), act on the detector’s internal sensitivity potentiometer (see the
manual for the detector concerned) in order to set the value (on the detector display panel)
corresponding to the concentration of the reference gas or the corresponding current (terminals).
(See the note and examples for case 1).
-
Then, CONSECUTIVELY set the value of the standard gas on the MX48 display panel
by acting on the measuring channel sensitivity potentiometer (Fig. 5).
-
Stop the injection of the standard gas, wait for the measurement to return to zero (on the
MX48 display panel). Then, press the “CALIBRATION” key (item C, Fig. 4). The
flashing yellow LED is extinguished and the “C” on the displa y panel disappears. The
measuring channel now operates normally and calibration has been completed.
5.4. 4-20 mA output adjustment for a measurement channel
Ø
4 mA adjustment
-
Ø
for a zero display
check 1 the 4 mA output current and adjust it if necessary using the 4 mA
potentiometer : see fig 9.
20 mA output adjustment
-
following the measurement display and the following formula :
Maximum scale
I = 4mA (0-DIV) + 16 mA x Number of divisions set
100 DIVISIONS
-
Check1 the 4 mA output current and adjust it if necessary using the 20 mA
potentiometer : see fig 9
1
Current reading is possible by connecting directly the corresponding output current (see fig 12) a "continuous"
milliammeter.
48
6 . M A I NT E NA NC E
REMINDER
The handling operations and adjustments described in this chapter must be performed by
authorized personnel only, as they are liable to affect detection safety.
6.1. Periodic / preventive maintenance
6.1.1. On the MX48 unit
The MX48 measuring unit requires practically no surveillance. It is, however, recommended that
the facilities available on the MX48 unit should be used to regularly test the appliance’s essential
functions, as follows:
Use the TEST key to check the correct operation of all the LEDs and the buzzer.
Use the “SIMULATION” menu to check the correct operation of the display panel, the triggering of
alarms (LED and relays), the slaving controls and the 4-20 mA current output.
Cause a fault to occur (such as a line fault by disconnecting a detector wire) to check the correct
operation of the fault “stages”.
6.1.2. On the detectors
The detectors must be calibrated at least twice a year.
Case 1
Detectors without integrated electronics (CAPTEX, CEX800, CEX810, etc.)
With this type of detector, the zero and sensitivity adjustments must be made on the MX48 unit.
SEE THE CHAPTER ON CALIBRATIONS (see 5-3, case 1) and carry out the operations
specified.
Case 2
Detectors with integrated electronics (CTX50, CTX100, CTX870, etc.)
With this type of detector, and for periodic maintenance, all that is required is action on the
detector. SEE THE CHAPTER ON CALIBRATIONS (see 5-3, case 2) and carry out the operations
specified.
49
NOTE
Our company is at your disposal to supply you with standard gas or an annual surveillance contract
(preventive maintenance). Under this contract, our specialists guarantee the perfect operation of
your installation. No adjustment is to be made between INDUSTRIAL SCIENTIFIC servicing
operations. This avoids any additional workload for the user’s maintenance services.
6.2. Failures: causes and remedies
FAILURES
Display channel not lit up and
no indicator light on.
CAUSES
On/Off switch in the Off
position.
Problem with mains power
supply or DC power supply
(24 V DC).
Mains fuses blown.
DC power (24 V DC) input
fuses blown.
+24 V DC internal protection
fuse blown.
Fault indicator light on (in
steady mode).
REMEDIES
Set the switch to the On
position (item A, Fig. 26).
Check the supply voltages on
input to the MX48 unit and, if
necessary, check in the
electric power supply
cabinets.
Replace the mains fuses (see
item A, Fig. 5).
Replace the 24 V DC fuses
located at the back of the
MX48 unit (item B, Fig. 5).
Replace the +24 V DC fuse
located on the power board
(item C, Fig. 5).
CAUTION
When replacing a fuse, it is mandatory to comply with the
required type and rating.
Faulty electrical connections
Check the connections on the
on the telemetry line (wires
MX48 terminal block and the
and detector).
detector terminal block.
Check that there is no short
circuit or break in the wires
on the telemetry cable.
Faulty detector.
Repair or replace the detector
(see internal electronics or
cell).
The type of detector does not Connect the correct type of
match the measuring channel
detector with the
configuration.
corresponding measuring
channel.
CAUTION
The measuring channel or line
may be damaged.
Negative offset too great
Perform calibration on the
(more than 20% of measuring detector and, then, on the unit,
scale).
if necessary. If the problem
persists, the cell must be
replaced.
50
Channel in maintenance mode
for more than 30 minutes.
Fault indicator light on (in
steady mode) and SUP
displayed.
The measurement is higher
than 100% of the measuring
scale.
An LED does not light up even Faulty LED.
though the corresponding
threshold is exceeded and the
buzzer and relay are actuated.
Return the channel to normal
operation by pressing the
Calibration key (Item C, Fig.
4).
To acknowledge the alarm,
the measuring channel must
be switched off and then
switched on again (by
programming).
If the problem persists and the
measurement is not consistent
with reality, the detector must
be calibrated.
Perform a general test on the
LEDs by pressing the TEST
key on the keypad and, if the
LED still does not light up,
the programming must be
modified by using the “Unit
programming” menu (buzzer
connected?).
Fall the buzzer switch
(Fig. 4).
An alarm is triggered, the LED The buzzer strap is not
lights up and the relay is
correctly positioned.
actuated but there is no audio
alarm.
The buzzer is not programmed If the audio alarm is wanted,
as “in service”.
the programming must be
modified by using the “unit
programming” menu (buzzer
connected?).
The audio alarm stops after 30 The buzzer is programmed to If the buzzer is to be sounded
s although alarms are still
operate for 30 seconds only.
as long as the alarms are
actuated.
actuated, the programming
must be modified by using the
“Unit programming menu”
(continuous buzzer?).
An alarm is triggered but the
The relays are faulty.
Short-circuit or open the relay
slaving controls are not
contact (as applicable) on the
actuated.
MX48 terminal block (Fig.
12) and, if the slaving
controls operate normally, the
corresponding channel board
must be repaired by an
approved technician.
51
Faulty electrical connections.
An electronic detector is in the
“CALIBRATION” position
and the corresponding channel
of the MX48 unit remains in
normal operation: no flashing
yellow LED.
Impossible to upload data from
the MX48 to a computer.
Remote acknowledgement is
impossible.
The channel is not
programmed to detect a
detector in “Calibration”
mode.
Faulty electric connections.
The cable does not match the
2-wire RS485 type of link.
Faulty electric connections.
The punch-type button is
faulty.
Short-circuit or open the relay
contact (as applicable) on the
MX48 terminal block (Fig. 12)
and, if the slaving controls still
do not work, the connections
must be checked on the MX48
connector and on the slaving
systems.
If it is so wished, the
programming of this channel
can be modified by using the
“Channel programming” menu
(self-calibration) and choose
"CAL detection : YES".
Check the connections on the
MX48 unit connector (Fig.8)
and the computer. Check that
the cable is satisfactory.
Replace the cable with a
suitable one.
Check the connections on the
MX48 unit connector (Fig. 8)
and on the punch-type button.
Replace the punch-type button.
6.2.1. Data printing
EXAMPLE
Computer
Printer
MX48
COMPUTER INTERFACE
COMPUTER INTERFACE
CAUTION
A computer or a printer management interface must, imperatively, be used to print data.
52
6.3. Scrapping of MX48
Concerning the conservation, of the protection and the improvement of the
quality of the environment, as well as for the protection of the health of the
persons and the careful and rational use of natural resources, MX48 has to be the
object of a selective collection for the electronic equipments and cannot be
scrapped with the normal domestic waste. The user thus has the obligation to
separate the MX48 of the other waste so as to guarantee that it is recycled in a
sure way at the environmental level. For more details of the existing sites of
collection, contact the local administration or the distributor of this product.
6.4. List of spare and replacement parts
DESIGNATION
Complete power unit
Complete measuring four channels board
Complete main board (FRONT)
(micro+display)
Female connector (5 points)
Line Female connector (9 points)
“Measuring channel” fuse, 630 mA, timedelayed
DC power supply fuse, 12.5 A, time-delayed
AC power supply fuse, 6.3 A, time-delayed
Fuse, 125 mA, time-delayed
Power board relay (DC)
Common alarm relay
AC mains relay (110 V AC)
“Measuring channel” alarm relay
“Channel actuating” relay
Lithium battery (on micro board)
Buzzer
Toroidal transformer
Fluorescent display panel
On/Off switch
Maintenance screwdriver
Complete casing MX48
Complete keyboard (FRONT)
REFERENCE
6451451
6451552
6451450
6152857
6152877
6154627
6154624
6154718
6154701
6155745
6155752
6155761
6155752
6155744
6111174
6112214
6111201
6133521
6153436
6145845
6121547
6451453
CAUTION
It is mandatory that replacement parts must be guaranteed INDUSTRIAL SCIENTIFIC
original parts as, if this is not the case, the safety of the equipment could be affected.
53
7 . DE T A I L ED T EC H NI C A L C HA R A CT ER I S T I CS
MANUFACTURER
INDUSTRIAL SCIENTIFIC
62000 ARRAS - FRANCE
BOX
- Wall- mounted box dimensions : 500 x 340 x 89
- Function: measuring unit
- Capacity: 4 or 16 measuring channel
- Measurement: continuous
- Storage temperature: -20°C to +55°C
- Operating temperature: -10°C to +45°C
- Relative humidity: 0 to 95% humidity, no condensation
- Protection : IP 65
- Weight : 11 kgs
ILLUMINATED INDICATIONS
- Fluorescent display panel, 2 lines of 16 characters
- 40 light-emitting diodes (power on, gas alarms, faults)
POWER SUPPLIES
- 103 to 122 V AC (in option)
- 207 to 244 V AC
- 21 to 31 V DC
- Power consumptions: 200 VA or 150 W
MEASURING INPUTS
- Active 2-wire or 3-wire shielded cables according to type of detectors
- Resistance in loop mode:
- 3-wire EXPLO: 32 Ω (1,000 m with wire 1.5 mm2 at 20°C)
- 4-20 mA, 2-wire: 64 Ω (2,000 m with wire 1.5 mm2 at 20°C)
- 4-20 mA, 3-wire: 32 Ω (1,000 m with wire 1.5 mm2 at 20°C)
54
RELAY OUTPUTS
- 2 independent measurement alarm relays per channel
- 1 common relay for alarm 3 or audio alarm transfer
- 1 common fault relay
SIGNAL OUTPUTS
- 4-20 mA analog per channel, maximum load resistance = 600 Ω
- Serial: RS 485 / 232 J BUS , common
MISCELLANEOUS OUTPUTS
Alarm remote acknowledgement
STANDARDS
Conformance with European standards CEM, low voltage and ATEX
CE mark
55
8 . S p e c i a l S p e c if i c a t io n s f o r u s e in P o t e n t i a l l y E x p lo s iv e
A t m o s p h e r e s i n a c c o r d a n c e w i t h E u r o p e a n D i r e c t iv e
AT EX 9 4 / 9 / E C.
The MX48 detection device designed to measure explosive gasses and oxygen complies
with the requirements of European Directive ATEX 94/9/EC on potentially explosive atmospheres.
As a result of its metrological performance, as tested by the research and testing organisation
INERIS, the MX48 device, is classified as a safety device when used with INDUSTRIAL
SCIENTIFIC CEX300 and OLC/OLCT 20, 40, 50 and 60 series detectors. The device may
therefore contrib ute to limiting the risk of explosion as a consequence of the data it supplies to
external units.
The information contained in the following paragraphs should be adopted and complied with
by the person respons ible for the site on which the equipment is installed. Please refer to the
provisions of European Directive ATEX 1999/92/EC on improving health and safety conditions for
workers exposed to potentially explosive atmospheres.
8.1. Specifications for mechanical and electrical installation in Classified
Areas.
Installation will comply with all applicable standards, and particularly with EN 60079-14,
EN 60079-17 and EN 50281-1-2.
The MX48 device must not be subject to intense mechanical vibration and must be installed
in a safe area away from potentially explosive atmospheres.
It is essential to refer to the user and installation manuals for the gas detectors referred to
above, particularly the paragraph entitled ‘Special Specifications for use in Potentially Explosive
Atmospheres in Accordance with European Directive ATEX 94/9/EC’
Where intrinsic safety installations are concerned, it should be borne in mind that the person
responsible for IS installation (the “System Designer”) must draw up a system document
demonstrating that every aspect of the Power Cable Detector system complies with intrinsic safety.
Please refer to EN 50039 for group II and EN 50394-1 for group I when drafting this document.
8.2. Metrological Specifications
The device complies with the following European standards:
With explosive gas detectors :
-
-
European standards EN 50054 and EN 50057 for Methane (calibration gas), Propane and
Hydrogen (gasses following response curves) where the device is used with CEX300 and
OLC/OLCT 20, 40, 50 and 60 series gas detectors. Where the device is used with other
types of sensor producing an output measurement current of 4/20 mA, these must
comply with paragraph 1.5 of Appendix II of the ATEX 94/9/EC Directive and be
compatible with their characteristics (cf. device transfer curve ).
European Standard EN 50271
56
Oxygen detectors:
-
European Standard EN 50104 where the device is used with OLCT 20, 40, 50 and 60 gas
detectors. Where the device is used with other types of sensor producing an output
measurement current of 4/20 mA, they must comply with paragraph 1.5 of Appendix II
of the ATEX 94/9/EC Directive and be compatible with their characteristics (cf. device
transfer curve ).
-
European Standard EN 50271
8.3. Connecting
detectors other than INDUSTRIAL SCIENTIFIC
detectors to the MX48 device
As previously explained, users wishing to connect detectors other than those manufactured by
INDUSTRIAL SCIENTIFIC, must ensure their compatib ility with the device in order that the
resulting combination may be considered as a safety device.
8.3.1.
Device transfer curves in 0% to 100% LEL configuration
The following curve shows the response of the device in terms of value measured, and fault
processing as a function of the input current value supplied by the detector. Where the user connects
a brand of detector other than INDUSTRIAL SCIENTIFIC to the MX48 device, he must check
carefully that the transfer curve is fully compatible with the device input characteristics, to ensure
that the data generated by the detector is correctly interpreted. Equally, the device must supply a
suitable power supply voltage, allowing for cable voltage losses.
Display
in % LEL
SUP
Fault
100% LEL
0% LEL
-17.5% LEL
Fault
1.2 4
mA mA
20
mA
Signal supplied by
the detector in mA
Please note: When the value measured is >= 100% LEL, the measuring device memorises the fact
that the value has exceeded the scale and the channels switch to alarm and fault mode. Resetting
these statuses is a manual operation to be performed by the user, who must follow the safety
regulations specific to the site. The reset is checked either by turning the device on and off or by a
maintenance inspection.
57
8.3.2.
Device transfer curves in 0% to 30.0% OXYGEN configuration
The following curve shows the response of the device in terms of value measured, and fault
processing as a function of the input current value supplied by the detector. Where the user connects
a brand of detector other than INDUSTRIAL SCIENTIFIC to the MX48 device, he must check
carefully that the transfer curve is fully compatible with the device input characteristics, to ensure
that the data generated by the detector is correctly interpreted. Equally, the device must supply a
suitable power supply voltage, allowing for cable voltage losses.
Display in %
O2 by volume
Fault
36.0%
30.0%
0.0
%
-5.3%
Fault
1.2 4
mA mA
8.3.3.
20 23.2
mA mA
Signal supplied by
the detector in mA
Power supply and load resistance characteristics
Maximum current available between terminals 2 and 3: 350 mA at 21 V.
Maximum no-load voltage between terminals 2 and 3: 30 V
Load resistance (outside the IS barrier) between terminals 1 and 2: 47 ohms
N.B.: This data applies only where detectors other than INDUSTRIAL SCIENTIFIC are used.
Where different types are mixed, please contact INDUSTRIAL SCIENTIFIC to establish the
feasibility of the combination.
8.4.
MARKING
INDUSTRIAL SCIENTIFIC
0080
OLCT50i
II 2 (G)
INERIS 04ATEX0064
58
59
9 . VI EW S S PE C I F I ED I N T HE M A NUA L
60
500
80.5
320
7
89
27.5
445
27.5
6.5
10
102.5
10
387.5
12.5
MX48 DIMENSIONAL PLAN
5
PLAN ENCOMBREMENT MX48
Figure N¦1
FIGURE 1
223.5
61
¼
2 vÚrrouillages
turn latches –1/4
2 off
de tour
Coffret
MX48
MX48
box
(voir fig N¦1)
(see Fig. N°1)
Stay
for holding up the
Compas pour retenir
cover
le couvercle en
position haute
Transformateur
Transformer
Clavier dÚportÚ
Offset keypad
Display card
N°4)
Carte afficheur
(voir fig(see
N¦4)Fig.
Carte alimentation
Power
supply card
(voir fig N¦3)
(see Fig. N°3)
DeuxiÞme
carte
Second
measurement
voie de mesure
channel
card
(voir fig N¦7)
(see Fig. N°7)
First measurement
card
(see
Fig. N°7)
(voir fig
N¦7)
PremiÞre carte
channel
voie de mesure
OVERALL VIEW OF THE MX48
(casing open)
Figure N¦2
VUE D'ENSEMBLE DU MX48
(carter ouvert)
15 presses-Útoupes PG9
15 PG9 cable glands
FIGURE 2
62
Connector for
Connecteur
pour
circuit
afficheur
display
circuit
General
switch
Interrupteur
général
(repère A) A)
(reference
Transformer
terminal
Bornier
pour transformateur
Mains
filter
Filtre secteur
Alarm relay
Relais alarme
Fault relay
Relais défaut
Mains
Fusiblesfuses
secteurs
Bornier
Clearacquit
and RS485
et RS485
terminal
Power
terminal
Bornier supply
alimentation
Fusibles
24V
24 V fuses
Rep B
Ref.
MX 48 POWER
SUPPLY CARD
CARTE
ALIMENTATION
MX48
(main
components)
(principaux composants)
Figure N°3
63
Interrupteur deBuzzer
m ise enswitch
fonction du buzzer
Connector
for ligne
line card
Connecteur
pour carte
Card
connector
Connecteur
pour carte
Buzzer
Power
supply
Connecteur
pour
carte alimentation
card
connector
O N /OFF
AL1
AL2
AL3
-
+ acquit enter
DEF
9-pin
femalesubD
(RS232)
Connecteur
9 points
fem elle
(RS232)
sub
D connector
(repÞre A) A)
(reference
Fluorescent
display
Afficheur
fluorescent
Calibration
key (ref.
C)C)
Touche calibrage
(rep
Touche
programkey
m a tion
Programming
(ref.(rep
D) D )
Clavier
pour la for
Keypad
m
aintenance (rep
Maintenance
(ref.B)
B)
MX 48 FRONT
LINKAGE
CARD
CARTE LI
AISON AVANT
MX48
(afficheur,m
icro,
clavier)
(display,
micro,
keypad)
Figure N¦4
FIGURE n° 4
64
Connector for display card
Support
forplots
programming the
Support de
de programmation
measurement
channels
1
Une
measurevoie
de ment
mesure
Programming
(programmÚ
following
suivantle
capteurused
thetype
type de
of detector
channel
utilisÚ)
Zero detector adjustment
RÚglage zÚro capteur
detector
RÚglage
sensibsensivity
ilitÚ
adjustment
capteur
Ifilament
4 mA
20 mA
FUNCTIONS
OF THE VARIOUS POTENTIOMETERS
FONCTIO N D E S D IFFERENTS POTENTIO M E T R E S
On theSUR
MX UNE
48 measurement
card
VOIE DE MESURE channels
MX48
Figure
N¦5
FIGURE 5
65
Broche
Pin n° N°:
1:
2: TXD RS232
3: RXD RS232
4:
5: GND
6: 485-B (-)
RS232
7: 485-A
(+)
8:
9:
N°1
N°6
N°9
N°5
IfSi
you
wish
to useutiliser
the RS485
link,RS485,il
the malefaut
DB9
vous
voulez
la liaison
“plug” connector must be connected to the female
connecter
le connecteur "bouchon" DB9 male
DB9
connector.
sur le connecteur
DB93femelle.
(internal
strap between
and 4)
(strap interne entre 3 et 4)
IPIN
LAYOUT FOR THE RS232 SERIAL LINK
CONNECTOR (Item A – Fig N°4)
BROCHAGE DU CONNECTEUR DE LIAISON RS232 (Rep A-Figure N°4)
Figure N°6
FIGURE N°6
66
Link RS232
Liaison
RS232
Link RS485
Liaison
RS485
Connector
Connecteur
pourfor display
card afficheur
carte
Voie 1
Voie 2
Voie 3
Voie 4
Support
programming
Support
de for
programmation
thevoies
measurement
des
de mesures channels
Potentiometer
PotentiomÌtres for
adjustments
de r+glages
Fuses
Capteur
125 mA fuse
Fusibles
Fuses
125 mA
R2 R1
630 mALigne
fuse
630 mA
Voie 1
Measurement
Borniers
de voieterminals
Channel
de mesure
R2 R1
R2 R1
Voie 2
Measurement
channel
Relais
d'alarme
alarm
de voie de mesure
relay
Voie 3
R2 R1
Voie 4
Rep
A A
Ref.
MX 48 MEASUREMENT
CHANNELS CARD
CARTE VOIES DE MESURE MX48
(main
components)
(principaux
composants)
Figure N¦7
FIGURE N° 7
67
Clear
1 (-)
Acquit
1
Clear
2 (+)
Acquit
2
GND
GND
485-A
485-A (+)
485-B
485-B (-)
--24v
24 v
Secteur
Mains
++24v
24 v
Mains
Secteur
NCNC
DEF
DEF
DEF
DEF
AL3
AL3
AL3
AL3
RACCORDEMENTS ELECTRIQUES SURCONNECTIONS
LA
ELECTRICAL
TO THE
CARTE ALIMENTATION MX48
MX48 Figure
POWER
SUPPLY
CARD
N¦8
FIGURE N° 8
68
Channel
Chan.22 Voie
Chan.33
Voie 1 1 Voie
Chan.
Voie 44
20 mA
4 mA
1: signal
minus
2: moins
3: plus
plus
4: +
5: 6:
7:
8:
9:
Channel
Voie 1 1
Channel
Voie 3 3
Channel
Voie 2 2
Channel
Voie 44
1
9
2
8
3
7
+
-
6
detector
Capteur
4.20
output
SortiemA
4.20
mA
Contact REL AL1
Contact REL AL2
EXAMPLE :EXEMPLE:REGLAGE
ADJUSTMENT OF THEDU
4.20
mA
onSUR
the Channel
4.20
mA
LA VOIE2 2
Figure
FIGURE
N°N°9
9
AMMETER
AMPEREMETRE
mAmA
69
« Capteurs
Pont » explosimetric
detectors
explosimétriques "PONT"
Example 1
Exemple 1
1 2 3
12 3
3-wire 420mA
mA
Capteurs
4.20
- 3detectors
fils
Exemple
2
Example
2
MX48
MEASUREMENT CHANNELS CARD
CARTE VOIE DE MESURE
EXAMPLE
CONNECTION
MX48
Exemples deOF
connexions
de capteursOF EXPLOSIMETRIC DETECTORS
et de capteurs 4.20
mA 3-WIRE
Ó3
AND
4-20 mA DETECTORS
explosimÚtriques
fils
Figure N°10
FIGURE N° 10
70
EXAMPLES OF CONNECTION OF 2 WIRE 4-20 mA DETECTORS AND FIRE
DETECTORS ON THE MX48
MEASUREMENT CHANNELS CARD
EXEMPLES DE CONNEXION DE CAPTEUR INCENDIE
ET DE CAPTEUR 4.20 mA A 2 FILS
SUR LA CARTE VOIE DE MESURE MX48
Figure N¦11
FIGURE
N°11
Note : The 2.7 k? resistor (on the last
detector = 3 maximum
Note: La rÚsistance de 2.7 K
O is to be placed at the end of
line
est Ó mettre en bout de ligne
(sur le dernier capteur = 3 au maximum)
11
3
3
1
1
3
3
Detector
1
Capteur 1
Detector
Capteur 2
2
22
22
77
17
44
R=2x3.9K
R=2x3.9 K
44
ATTENTION
configuration ofdethelameasurement
channel
ATTENTION a tolatheconfiguration
voie de mesure
VV-
2-wire 4-20 mA
Example 2
Capteurs 4.20 mA 2 fils
V+
V+
Exemple 2
71
O
en in /
/
Capteurs incendie
Fire
detectors (Ionic
(Ionique ou Optique)
or optical)
Exemple 1
Example1
1: signal
signal
2: minus
moins
3: plus
plus
4: +
5: 6:
7:
8:
9:
1
9
2
8
3
7
6
4
Capteur
detector
SortiemA
4.20current
mA
4-20
output
Contact
Contact RELREL
AL1 AL1
Contact
Contact REL
REL
AL2 AL2
CONNEXIONS SUR LE BORNIER
DETAILSDETAIL
OFDES
CONNECTIONS
OF A TERMINAL BLOCK TO THE
D'UNE VOIE DE MESURE DE MX48
MX48 MEASUREMENT CHANNELS
Figure N¦12
5
FIGURE 12
72
Detector
Bornier terminal
de
Capteur
: Type
block
: Type
A A
1
2
terminal block
Bornier de MX48
voie de
mesure MX48
(See figure 12)
(voir fig 12)
4
1
5
R
1
6.8K
R
2
R
2
1.8K
3
6
7
Cable 3xnCable
BlindÚ
3xn shielded
6 max
Maxi
en boucle
6?
in loop
entre 2 et 3 MX48
between
2 and 3 MX48 units
CONNECTION OF A FLAME DETECTOR
B R A NWITH
C H E M TERMINAL
E N T D 'UN CAPTEUR
FLAMME
EQUIPPED
BLOCK OF
TYPEEQUI
A PE
D 'U N B O R N IER TYPE A SUR LE MX48
Figure N¦13
FIGURE 13
73
Detector
Bornierterminal
de
Capteur
: Type
block
: Type
B B
2
5
Bornier de
voie de
MX48
terminal block
mesure du MX48
(See figure 12)
(voir fig 12)
7
1
1.8K
R
R
2
9
2
10
3
Cable3xn
3xnshielded
BlindÚ
Cable
6?6 m a xMaxi
in loop
en boucle
entre 22et
3 MX48
between
and
3 MX48 units
CONNECTION OF A FLAME DETECTOR
BRANCHEMENT
D'UN CAPTEUR
FLAMME
EQUIPEB
EQUIPPED
WITH TERMINAL
BLOCK
OF TYPE
D 'U N B O R N IER TYPE B SUR LE MX48
Figure N¦14
FIGURE 14
74
R
1
6.8K
Detector terminal
block : Type C
1
2
MX48 terminal block
(See figure 12)
4
1
5
R
2
R
2
1.8K
3
6
R 6.8K
1
7
Cable 3xn shielded
8
6? max in loop
between 2 and 3 MX48 units
CONNECTION OF A FLAME DETECTOR
EQUIPPED WITH TERMINAL BLOCK OF TYPE C
FIGURE 15
75
Detector
terminal
block:
Bornier
de capteur:
Typetype
A or A
Cou C
1
terminal
block
BornierMX48
de voie
de
mesure(See
du MX48
figure 12)
(voir fig 12)
2
1
H
A
11
2
G
B
12
R
3
Isolationisolator
Galvanique
Galvanic
Cable
3xnshielded
blindÚ
Cable
3xn
6?6 max inMaxi
loopen boucle
entre
2 et33MX48
MX48 units
between
2 and
Remarque
relais du
capteur
utilisable
Remark
: TheLedetector
relay
can reste
be used
in local mode.
galvanique
est situÚe
proximitÚ
TheL'isolation
galvanic isolator
is located
in theÓ immediate
de la centrale
vicinity of the MX48 unit.
EXEMPLE D'UTILISATION DU SIGNAL 4-20 mA FOURNI PAR UN CAPTEUR
FLAMME (UV/IR ou IR3) EQUIPE D'UN BORNIER DE TYPE A ou C
EXAMPLE OF UTILIZATION OF THE
4-20 mA SIGNAL SUPPLIED BY A FLAME
Figure N¦16
DETECTOR (UV/IR OR IR3) EQUIPPED WITH TERMINAL BLOCK TYPE A OR C
FIGURE 16
76
Detector
Capteur
terminal block:
Type BBornier Type: B
2
Alimentation
DC
Auxiliary DC
auxilpower
iaire supply
5
+
1
-
2
MX48Bornier
terminaldeblock
voie de
mesure
(see figure
12) du MX48
(voir fig 12)
Capteur
Detector
terminal block:
Type: A
TypeBornier
A
4
1
5
7
R
2
1.8K
3
R
2
6
R
1
1.8K
7
9
R 6.8K
1
10
Remark
:
Star-connected
powerencircuit
Remarque:
Circuit alimentation
Útoile
Signal
circuiten
in sÚrie
series(boucle)
(loop)
Circuit
signaux
R1:R1
uniquement
sur
le dernier
: only on the last
detector capteur
(3 maxi) (5 au maximum)
EXAMPLE OF UTILIZATION
FLAME DETECTORS
EQUIPPED WITH EITHER
EXEMPLE OF
D'UTILISATION
DE CAPTEURS
CONNECTOREA
B AND
SUPPLIED WITH
AUXILIARY A
DC
Q UOR
IPES
INDIFEREMMENT
DE CONNECTEUR
OUPOWER
ET ALIMENTATES PAR UNE ALIMENTATION DC
Figure N¦17
FIGURE
17
77
Local box including power unit
Boitier
local comprenant
alimentation
+ transfer
terminal
block (outside
classified
+ bornier report (Hors zone classÚe)
areas)
Bornierterminal block:
Detector
du capteur
Type: A
Type
A
+
1
ALIM
Bornier
de voie
de
MX48
terminal
block
mesure
(see
figuredu
12)MX48
(voir fig 12)
Galvanic
isolator
Isolation
Galvanique
-
2
1
H
A
11
2
G
B
12
Cable
blindÚ
Cable
2xn2xm
shielded
250
en boucle
250?
maxMaxi
in loop
entre
1
et
2
between 1 and MX..
2 MX48
Cable
2xn blindÚ
Cable 2xn
shielded
17
Maxi en boucle
17? max
between
entre
1 etin2 loop
capteurs
1 and 2 detector
TYPICAL INSTALLATION BLOCK DIAGRAM TO BE MULTIPLIED BY NUMBER OF AREAS IN INSTALLATION
SYNOPTIQUE TYPE D'INSTALLATION A MULTIPLIER PAR NOMBRE DE ZONES DANS INSTALLATION
VoieMX..
MX..
Channel
Channel
Voie MX..
MX..
Voie MX..
MX..
Channel
4xn 2
I.G
Xx2xm
2
I.G
4xn 2
CAPTEUR
DETECTOR
CAPTEUR
DETECTOR
4xn 2
I.G
CAPTEUR
DETECTOR
BOITIER
Local
box withLOCAL
PWR
ALIM transfer
unitAVEC
and
signal
ET
BORNIER
terminal
block
REPORT SIGNAL
- capteur
a single
detector
MX48MX48
measuring channel
- 1 seul
par
voie deper
mesure
- Le relais
du
thecapteur
detector
reste
relyutilisable
can be used
localement
in local mode.
- L'isolation
galvanique
est situÚe
Ó proximitÚ
la centrale
The
galvanic isolator
is located
in theimmÚdiate
immediatedevicinity
of the MX48
MX48 unit.
EXAMPLE OF UTILIZATION
AN INTERCONNECTION
BOX
EXEMPLEOF
D'UTILISATIO
N
ANDBAO ITIER
GALVANIC
ISOLATORO N
D'INTERCONNEXI
U N E ISOLATION
Figure N¦18
FIGURE
18
78
Ventostat VT
Bornier
du
terminal
block
Ventostat
MX48
terminal
block
Bornier
de voie
de
du MX48
(seemesure
figure 12)
(voir fig 12)
+DC
0V
1
Signal: 4-20mA
2
3
Buttons
Boutons
Please
do not touch
Ne pas toucher
SVP
CONNECTION OF A CO2 DETECTOR
BRANCHEMENT
UNTYPE
CAPTEUR
OF
VENTOSTAT D'
VT
TYPE VENTOSTAT VT SUR LE
Figure N¦20
FIGURE 20
79
autres
capteurs
Other
detector
autres
capteurs
Other
detector
1
4
3
1
3
2
3
5
1
7
2
3
V+
3
V1
1
8
6
4
Bornier
Terminal
block
SiBarriÞre
barrier (clipper)
de Si (Úcretteur)
Type
MTL787S+
Type
MTL787S+
(clipper)
BarriÞre deSi
Sibarrier
(Úcretteur)
Type Z787/EX
Type Z787/EX
Detector CTX/COX100
Capteur
CTX/COX 100
V+
3
V1
Terminal
Bornier
block
DetectorCapteur
CTX/COX100
CTX/COX 100
AtmosphÞre
explosible
Explosive
atmosphere
E X EEXAMPLES
M P L E S D EOF
R ACONNECTION
C C O R D E M E N TOF
S DE
AVEC
DETECTORS
DES BARRI
WITH
ERESSiDE
BARRIERS
Figure N¦21
FIGURE 21
80
AtmosphÞre
explosible
Explosive
atmosphere
123
1
S
Terminal
Bornier
block
3
S
Terminal
Bornier
block
+
+
2-wire
Capteurs
4- 204.20
mA detectors
mA 2 filsother
autres
than
qu'OLDHAM
ISCOLDHAM models
Capteurs
mA 3 filsother
autres
qu'OLDHAM
3-wire
4- 204.20
mA detectors
than
ISCOLDHAM models
4-20 mA DETECTORS
OTHER THAN
ISC-OLDHAM
CAPTEURS
4.20 mA AUTRES
QU'OLDHAM
MODELS
(Power-supplied by MX48 unit)
(alimentés par la centrale MX48)
FIGURE 22
Figure
N°22
81
1 3
VV+
VV+
Capteur TOX 1
Detector TOX 1
VV+
VV+
Capteur TOX 2
Detector TOX 2
EXAMPLE OF “PARALLEL” WIRING OF 2 DETECTORS OF
EXEMPLE
DE CABLAGE
"PARALLELE"
CTX300
“Co Parking”EN
(5 maximum)
DE 2 CAPTEURS CTX50 (5 Maximum)
FIGURE
23
Figure
N°23
82
230 VAC
SirÞne
Siren
E lectrovanne
Solenoid valve
EXAMPLE
OF CONNECTION
OF EXTERNAL DEVICES TO
THE ALARM 1 AN
2 RELAY CONTACTS
A MX48
EXEMPLE
DE RACCORDEMENT
D'ORGANES
EXTERNES
SUR OF
LES
MEASURING CHANNEL
CONTACTS DE RELAIS ALARMES 1 et 2 D'UNE VOIE DE MESURE DE MX48
FIGURE 24
Figure
N°24
83
+
-
+
-
E2
-
E1
ENREGISTREUR
Recorder
EXEMPLE DE RACCORDEMENT D'UN ENREGISTREUR A 2 ENTREES
EXAMPLE OF CONNECTION OF A 2 INPUTS RECORDER TO THE 4-20 mA OUTPUT OF TWO
MESURING CHANNEL
SUR LA SORTIE 4-20 mA DE 2 VOIES DE MESURE
FIGURE 25
Figure
N°25
84
85
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