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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