Operating Manual
GM420
Loop monitor
to monitor the PE conductor in AC systems
Software version: D268 V1.0x
Power in electrical safety
TGH1413en/09.2007
Bender Inc.
USA:
700 Fox Chase
Coatesville, PA 19320
Toll Free: 800-356-4266
Phone: 610-383-9200
Fax: 610-383-7100
E-mail: info@bender.org
Canada:
5810 Ambler Drive, Unit 1
Mississauga, ON L4W 4J5
Toll Free: 800-243-2438
Phone: 905-602-9990
Fax: 905-602-9960
E-mail: info@bender-ca.com
© Bender Inc.
Web: http://www.bender.org
All rights reserved.
Content subject to change.
Table of Contents
1. Effective use of this manual ........................................................................... 5
1.1
1.2
1.3
Notes for the user ............................................................................................. 5
Intended use ...................................................................................................... 5
Fast commissioning of the loop monitor in AC systems ................... 6
2. Safety information ........................................................................................... 7
2.1
2.2
Safety instructions ........................................................................................... 7
Work activities on electrical installations ................................................ 7
3. Function ............................................................................................................. 9
3.1
3.2
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.2.8
3.2.9
3.2.10
3.2.11
3.2.12
3.2.13
3.2.14
Device features ................................................................................................. 9
Function ............................................................................................................... 9
Preset function ............................................................................................... 10
Protected measuring circuit ...................................................................... 11
Automatic self test ........................................................................................ 12
Manual self test .............................................................................................. 12
Functional faults ............................................................................................ 12
Fault memory ................................................................................................. 12
Assigning alarms to the alarm relays K1/K2 ........................................ 12
Time delays t, ton and toff ........................................................................... 12
Start-up delay t ............................................................................................... 13
Response delay ton ....................................................................................... 13
Delay on release toff ...................................................................................... 13
Password protection (on, OFF) ................................................................. 13
Factory setting FAC ...................................................................................... 13
Erasable history memory ............................................................................ 13
4. Installation and connection ......................................................................... 15
5. Operation and setting ................................................................................... 17
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3
Table of Contents
5.1
5.2
5.3
5.4
5.5
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.5.7
5.5.8
5.5.9
5.5.10
5.5.11
5.6
5.7
Display elements in use .............................................................................. 17
Function of the operating elements ...................................................... 18
Menu structure ............................................................................................... 19
Display in standard mode .......................................................................... 21
Display in menu mode ................................................................................ 22
Parameter query and setting: Overview ............................................... 22
Setting the response values for loop resistance
and the associated hysteresis ................................................................... 25
Setting the response values for extraneous voltage
and hysteresis ................................................................................................. 26
Setting the fault memory and operating mode
of the alarm relays ......................................................................................... 27
Assigning alarm categories to the alarm relays ................................. 28
Setting time delays ....................................................................................... 31
Factory setting and password protection ............................................ 32
Restoring factory setting ............................................................................ 33
Manual activation of the preset function ............................................. 34
Device information query .......................................................................... 34
History memory query ................................................................................. 34
Preset function/ factory setting ............................................................... 35
Commissioning .............................................................................................. 35
6. Technical data GM420... ............................................................................... 37
6.1
6.2
4
Standards, approvals and certifications ................................................ 40
Ordering information ................................................................................... 40
TGH1413en/09.2007
1. Effective use of this manual
1.1 Notes for the user
This manual is intended for experts in electrical engineering and
electronics!
In order to make it easier for you to find specific text passages or references in this manual and for reasons of comprehensibility, important information is emphasized by symbols. The meaning of these symbols is
explained below:
Information calling attention to hazards are marked
with this warning symbol.
Information intended to assist the user to make optimum
use of the product are marked with the Info symbol.
1.2 Intended use
The loop monitor of the GM420 series is designed to monitor the PE
conductor in AC systems. The extraneous voltage Uf between the terminals E and KE must not exceed AC 12 V. The ohmic resistance of the
conductor loop and the existing extraneous AC voltage Uf will be indicated on the display.
Measurement results can be adversely affected by DC extraneous
voltage Uf occurring during the resistance measurement process.
Separate supply voltage Us is required.
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5
Effective use of this manual
1.3 Fast commissioning of the loop monitor in AC systems
If you are already familiar with the function of loop monitoring, you can
reduce the time for commissioning and connection using this brief description.
1. Check that the PE conductor to be monitored is operated in an AC system. In addition, check that the resistance of the conductor loop is
≤ 66 Ω and that the extraneous voltage is Uf < 12 V. This is the precondition for an automatic setting of the response values (Preset) after the
first connection to the supply voltage.
When the loop resistance is > 66 Ω, a response value of 100 Ω will automatically be set.
2. Make sure that the loop monitor is in the delivery status (factory setting
has not been changed). In case of doubt, restore the factory setting
(page 33).
3. When the conditions 1 and 2 are satisfied, you can connect the loop
monitor according to the wiring diagram (page 16). Once the device is
connected to the supply voltage, the device determines the loop resistance Rm and automatically sets the response value > R for the loop
resistance Rm:
Response value (> R) = (Rm + 0.5 Ω) x 1.5
Example:
Rm = 2.5 Ω
Resulting response value: (2.5 Ω + 0.5 Ω) x 1.5 = 4.5 Ω
4. The currently measured loop resistance between the terminals E and
KE appears on the display. In addition, you can query the existing extraneous voltage Uf using the UP and DOWN keys.
For detailed information about the preset function refer to page 10.
Page 35 provides a summary of all factory settings.
If you want to reset the loop monitor to its factory settings, refer to the
description on page 33.
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2. Safety information
2.1 Safety instructions
In addition to this data sheet, the documentation of the device includes
a sheet entitled "Important safety instructions for BENDER products“.
2.2 Work activities on electrical installations
All work activities necessary for installation, commissioning or work
activities during operation of electrical devices or systems are to be carried out by adequately skilled personnel.
Observe the relevant regulations applying to work on electrical installations, in particular DIN EN 50110 or its subsequent regulation.
Unprofessional work activities on electrical installations
may result in a threat of danger to life and limb!
If the equipment is used outside the Federal Republic of Germany, the
respective national standards and regulations are to be observed. The
European standard EN 50110 is recommended to be used as a directive.
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Safety information
8
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3. Function
3.1 Device features
Loop monitoring of the PE conductor in AC systems
Loop resistance measurement and indication in the range of 0...100 Ω.
The extraneous voltage Uf must not exceed A 12 V.
Measurement and indication of an existing extraneous voltage Uf
of AC 0...50V, even when the resistance measuring circuit has been disconnected to provide protection.
Measuring current Im = DC 20 mA
Preset function:
Automatic setting of the response value for the loop resistance Rm (> R)
r.m.s. value measurement of the extraneous AC voltage Uf (> U)
Start-up delay, response delay and delay on release
Adjustable switching hysteresis for R and U
Measured value display via multi-functional LC display
Alarm indication via LEDs (AL1, AL2) and changeover contacts (K1, K2)
N/C or N/O operation selectable
Password protection against unauthorized parameter changing
Fault memory can be deactivated
3.2 Function
Once the supply voltage is applied, the start-up delay t is activated.
Measured resistance and voltage values changing during this time do
not influence the switching state of the alarm relays.
The devices provide two individually adjustable measuring channels
(loop resistance / extraneous voltage Uf). When the measuring quantity
exceeds the response value (Alarm 1) or falls below the response value
(Alarm 2), the time of the response delays ton 1/2 begins. When the response delay has elapsed, the alarm relays switch and the alarm LEDs
TGH1413en/09.2007
9
Function
light. When the measuring value exceeds or falls below the release value
(response value plus hysteresis) after the alarm relays have switched,
the selected release delay toff begins. When toff has elapsed, the alarm
relays switch back to their original state. With the fault memory activated, the alarm relays do not change their actual state until the reset button R is pressed.
3.2.1
Preset function
After connecting the device for the first time, the response value for the
loop resistance (Alarm 1) is automatically set once only to the following
value:
Response value loop resistance
(> R) = (Rm + 0.5Ω) x 1.5
GM420
Extraneous voltage
> U (Uf )
Preset
operating range
Response value
>R
AC 25 V
0 Ω...∞ Ω
(Rm + 0.5 Ω) x 1.5
max. 100 Ω
If the measured resistance value is > 66 Ω, the response value will automatically be set to 100 Ω.
If loop resistances of approx. ≥ 1 kΩ exist, the preset function will be
ineffective. Hence, the previous response value will remain. The message "AL not SEt" appears on the display. If you exit "AL not SEt" with
Enter, the response value will be set to 100 Ω.
For details on how to change the response value manually refer to
page 25.
After restoring the factory settings, the preset function is automatically
active again. Also refer to page 33.
During operation, the preset function can be started manually via the
menu SEt. Also refer to page 34.
10
TGH1413en/09.2007
Function
3.2.2
Protected measuring circuit
During the loop resistance measurement, the existing extraneous voltage must not exceed specified values. If the extraneous voltage exceeds
the limit values, the measuring circuit will be disconnected (Overload
OL). This protective mechanism will also be activated when the loop resistance values are too high.
A separate measuring circuit ensures that extraneous voltages Uf (>U)
of 1...50 V will be monitored!
The table below shows the respective switching thresholds and the corresponding messages shown on the display:
Uf (> U)
Rm (> R)
Display
Meaning:
≥ 12 V /
≥ ca. 1 kΩ
The measuring circuit has been
deactivated by the device software.
≥ 15 V /
≥ approx. 5
kΩ
The measuring circuit has been
additionally deactivated by the
device hardware.
(additional R).
If the extraneous voltage Uf falls below values ≤ 10 V, the loop resistance measuring circuit will be activated again, provided that the measured loop resistance does not exceed the limit of approx. 1 kΩ.
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11
Function
3.2.3
Automatic self test
The device automatically carries out a self test after connecting to the
system to be monitored and later every hour. During the self test internal functional faults are detected and will appear in form of an error
code on the display. The alarm relays are not checked during this test.
By default, K1 signals the faults detected.
3.2.4
Manual self test
After pressing the internal test button for > 1.5 s, a self test is performed
by the device. During this test, functional faults will be determined and
appear in form of an error code on the display. The alarm relays are not
checked during this test.
While the test button T is pressed and held down, all device-related display elements are indicated on the display.
3.2.5
Functional faults
If an internal functional fault occurs, all three LEDs flash. An error code
will appear on the display (E01...E32).
For example, E08 means: Incorrect internal calibration. In such a case
please contact the Bender Service.
3.2.6
Fault memory
The fault memory can be deactivated. A stored fault can be deleted by
pressing the reset button "R".
3.2.7
Assigning alarms to the alarm relays K1/K2
Different alarm categories can be assigned to the alarm relays K1/K2 via
the menu "out".
3.2.8
Time delays t, ton and toff
The times t, ton and toff, described below, delay the output of alarms via
LEDs and relays.
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Function
3.2.9
Start-up delay t
After connection to the supply voltage, the alarm indication is delayed
by the preset time t (0...99 s).
3.2.10 Response delay ton
When the response value is reached, the loop monitor requires the response time tan until the alarm is activated.
A preset response delay ton (0...99 s) adds up to the device-related operating time tae and delays alarm signalling (total delay time tan = tae +
ton).
If the fault does not continue to exist before the time of the response
delay has elapsed, an alarm will not be signalled.
3.2.11 Delay on release toff
When no alarm exists after deactivating the fault memory, the alarm
LEDs go out and the alarm relays switch back to their original state. The
release delay (0...99 s) allow to maintain the alarm state for the selected
period.
3.2.12 Password protection (on, OFF)
After activating the password protection (on), settings are only possible
when the correct password (0...999) has been entered. If you cannot operate your device because you cannot remember your password, please
contact info@bender-service.com.
3.2.13 Factory setting FAC
After activating the factory setting, all settings previously changed are
reset to delivery status. In addition, the preset function allows automatic
adaptation of the response value in relation to the loop resistance.
3.2.14 Erasable history memory
The first alarm value that occurs will be stored in this memory.
Subsequent alarms do not overwrite this "old“ value. The memory can
be cleared using the Clr key in the menu HiS.
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13
Function
14
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4. Installation and connection
Ensure safe isolation from supply in the installation area. Observe the installation rules for live working.
General dimension diagram and drawing for screw fixing
Zubehör/
Accessory
,5
,1
36 mm
45
67,5
90 mm
31
116 mm
,5
47
100 mm
70
The front plate cover is easy to open at the lower part marked by an
arrow.
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15
Installation and connection
1. DIN rail mounting:
Snap the rear mounting clip of the device into place in such a way that
a safe and tight fit is ensured.
Screw fixing:
Use a tool to move the rear mounting clips (a second mounting clip is
required, see ordering information) to a position that it projects
beyond the enclosure. Then fix the device using two M4 screws.
2. Wiring
Connect the device according the wiring diagram.
L1
~/+
A1 A2
L2
L3
PE
E
KE
M
E
Terminal
6A
Us
~/–
IT-System
6A
A1
A2
KE
Connections
A1, A2 Connection to supply voltage Us
E Connection to PE conductor (equivalent to functional earth)
KE Connection to monitoring conductor E.
11, 12, 14 Alarm relay K1
21, 22, 24 Alarm relay K2
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5. Operation and setting
5.1 Display elements in use
A detailed description of the meaning of the display elements is given
in the table below.
Eleme
nt
Display elements in
use
Function
> R Loop resistance (Alarm 1)
> U~ Extraneous voltage (Alarm 2)
1, r1 Alarm relay K1
R2, r2 Alarm relay K2
R, U Response value hysteresis
Hys % as %
OL
ton1
ton2
t
toff
M
Response value (that is non-adjustable) is exceeded (Overload)
Response delay ton1 (K1)
Response delay ton2 (K2)
Start-up delay t
Delay on release toff K1, K2
Fault memory active
Operating mode of the relays K1, K2
Password protection activated
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17
Operation and setting
5.2 Function of the operating elements
Device front
Eleme
nt
Function
ON
Power On LED, green
AL1
LED Alarm 1 lights (yellow):
Response value > R exceeded
LED Alarm 2 lights (yellow):
Response value > U reached
AL2
0.9 Ω Display in standard mode:
ON
T
AL1 AL2
R
M
t
Test button (> 1.5 s):
To indicate the available display elements, to start a self test;
Up key (< 1.5 s):
Menu items/values
R
Reset button (> 1.5 s):
Deleting the fault memory;
Down key (< 1.5 s):
Menu items/values
MENU
MENU
18
Rm = 0.9 Ω;
Fault memory active
MENU key (> 1.5 s):
Starting the menu mode;
Enter key (< 1.5 s):
Confirm menu item, submenu item
and value.
Enter key (> 1.5 s):
Back to the next higher menu level
TGH1413en/09.2007
Operation and setting
5.3 Menu structure
All adjustable parameters are listed in the columns "menu item" and "adjustable parameters". A display-like representation is used to illustrate
the parameters in the column menu item. Different alarm categories can
be assigned to the alarm relays K1, K2 via the submenus r1, r2. This is
done by activation or deactivation of the respective function.
Menu
Submenu:
AL
(response
values)
Menu Activati
item
on
>R
-
Loop resist. in Ω (Alarm 1)
R Hys
-
Hysteresis, > R
>U
-
Extran. voltage (Alarm 2)
U Hys
-
Hysteresis, extran. voltage
M
ON
1
2
1 Err
r1
out
(output
control)
(K1: (assignment alarm
category)
r2
(K2: (assignment alarm
category)
TGH1413en/09.2007
Adjustable parameter
Fault memory (on, off)
-
Operating mode K1 (n.o.)
-
Operating mode K2 (n.o.)
ON
Device error at K1
r1 > R
ON
Loop resistance at K1 too
high
1
ON
Measuring current disconnection at K1
OL
r1 > U
off
Extran. voltage at K1
1 tES
off
Manual device test at K1
2 Err
off
Device error at K2
r2 > R
off
Loop resistance at K2 too
high
2
OL
off
Measuring current disconnection at K2
r2 > U
ON
Extraneous voltage K2
2 tES
off
Manual device test at K2
19
Operation and setting
t
(timing
check)
t on 1
Response delay K1
t on 2
Response delay K2
t
t off
FAC
20
Restore factory settings
PrE
Manual preset
SYS
Function blocked
Display hard / software version
InF
HiS
Delay on release K1/K2
Parameter setting via password
Set
(device
control)
Start-up delay
Clr
History memory for the first
alarm value, erasable
TGH1413en/09.2007
Operation and setting
5.4 Display in standard mode
By default, the resistance between the
terminals E and KE is indicated on the display.
In the standard mode, the currently measured values of the loop
resistance or extraneous voltage can be displayed by using the
Up and Down keys.
In order to change the default display, confirm your choice with Enter.
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21
Operation and setting
5.5 Display in menu mode
5.5.1
Parameter query and setting: Overview
Menu item
AL
out
Configuration of the fault memory and the alarm relay:
– Activating/deactivating the fault memory
– Select N/O operation (n.o.) or N/C operation (n.c.)
individually for each K1/K2
– Assign the alarm categories loop resistance, extraneous voltage or device error individually to each K1/
K2 (1, r1 / 2, r2).
t
22
Adjustable parameter
Response values query and setting:
– Loop resistance: > R (AL1)
– Hysteresis of the response value: Hys > R
– Extraneous voltage: > U (AL2)
– Hysteresis of the response value: Hys > U
Setting delays:
– Response delay ton1/ton2
– Start-up delay t
– Delay on release toff (LED, relay)
Set
Device control parameter setting:
– Enable or disable password protection, change the
password
– Restore factory setting;
– Starting preset function PrE;
– Service menu SyS blocked
InF
Query hard and software version
HiS
Query the first stored alarm value
ESC
Move to the next higher menu level (back)
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Operation and setting
Menu structure
t >1,5 s
t > 1,5 s
t < 1,5 s
AL
out
t
SEt
InF
HiS
ESC
t < 1,5 s
t > 1,5 s
ESC
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23
Operation and setting
Parameter settings
An example is given below on how to change the alarm response value
for the loop resistance > R. Proceed as follows:
1. Press the MENU/Enter key for more than 1.5 seconds. The flashing short
symbol AL appears on the display.
2. Confirm with Enter. The symbols > R flash.
3. Confirm with Enter. the current value for Ω flashes.
4. Use the Up or Down key to set the appropriate response value. Confirm
with Enter. > R flashes.
5. You can exit the menu by:
– Pressing the Enter key for more than 1.5 seconds to reach the next
higher level or
– selecting the menu item ESC and confirming with Enter to reach the
next higher level.
The currently active segments are flashing! In the figures below, the segments where device settings can be carried out
are highlighted by an oval.
The menu mode can be reached by pressing the MENU key for
more than 1.5 seconds.
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Operation and setting
5.5.2
Setting the response values for loop resistance and the associated hysteresis
Set the resistance value at which an alarm is to be signalled.
Setting the response value for the loop resistance
2x
>1,5 s
Setting the hysteresis of the resistance response value
1x
2x
>1,5 s
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25
Operation and setting
5.5.3
Setting the response values for extraneous voltage and
hysteresis
Set the extraneous voltage response value at which an alarm is to be signalled.
Setting the extraneous voltage response value (> U)
2x
2x
>1,5 s
Setting the hysteresis for extraneous voltage
3x
2x
>1,5 s
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Operation and setting
5.5.4
Setting the fault memory and operating mode of the alarm
relays
Deactivating the fault memory
2x
>1,5 s
Setting the alarm relay K1 to N/C operation (n.c.)
1x
2x
>1,5 s
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Operation and setting
5.5.5
Assigning alarm categories to the alarm relays
Loop resistance, extraneous voltage and device-related errors can be assigned to the alarm relays K1 (r1, 1) and K2 (r2, 2). By default, K1 signals an alarm in case of too high loop resistance. K2 signals an alarm in
case of too high extraneous voltage Uf.
A few assignment examples for alarm relay K1 are illustrated below:
Alarm relay K1: Deactivating the category device error
3x
3x
>1,5 s
Alarm relay 1: Deactivating the category loop resistance
3x
1x
3x
>1,5 s
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Operation and setting
Alarm relay 1: Deactivating the category measuring current disconnection
3x
2x
3x
>1,5 s
Alarm relay 1: Activating the category extraneous voltage
3x
3x
3x
>1,5 s
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29
Operation and setting
Alarm relay 1: Activating the category manual self test
3x
4x
3x
>1,5 s
When an alarm relay (K1/K2) has been deactivated in the
menu, an alarm will not be signalled by the respective
changeover contact! An alarm will only be indicated by
the respective alarm LED (AL1/AL2)!
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Operation and setting
5.5.6
Setting time delays
Use this segment to set a response delay ton1 (0...99 s) for K1, ton2 (0...99
s) for K2, a starting delay t (0...99 s) when starting the device,
as well as a common release delay toff (0...99 s) for K1, K2. This setting
is only relevant when the fault memory M is deactivated.
The operating steps for the setting of the response delay ton1 and the
start-up delay t are illustrated by way of example.
Setting the response delay ton1
2x
>1,5 s
Setting the start-up delay t
2x
2x
>1,5 s
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31
Operation and setting
5.5.7
Factory setting and password protection
Use this menu to activate the password protection, to change the password or to deactivate the password protection. In addition, you can reset the device to its factory settings.
a) Activating the password protection
2x
>1,5 s
b) Changing the password
2x
>1,5 s
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Operation and setting
c) Deactivating the password protection
2x
>1,5 s
5.5.8
Restoring factory setting
....
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33
Operation and setting
5.5.9
Manual activation of the preset function
2x
....
3x
>1,5 s
If loop resistances of approx. ≥ 1 kΩ exist, the preset function will be
ineffective. The message "AL not SEt“ appears on the display.
5.5.10 Device information query
This function is used to query the hardware (d...) and software (1.xx)
versions. After activating this function, data will be displayed as a scrolling text. Once one pass is completed you can select individual data sections using the Up/Down keys.
....
....
5.5.11 History memory query
The history memory can be selected via the menu HiS. Use the Up and
Down keys to view the next display. If Clr is flashing, the history memory can be cleared by pressing the Enter key.
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Operation and setting
5.6 Preset function/ factory setting
On initial commissioning, a pre-defined response value in relation
to the measured resistance value Rm is automatically set:
Response value loop resistance: (> R) = (Rm + 0,5 Ω) x 1.5
Hysteresis (R Hys):
Extraneous voltage (> U)
Hysteresis (U Hys):
Fault memory M:
Operating mode K1 (> R):
Operating mode K2 (> U):
Start-up delay:
Response delay:
Delay on release:
Password:
25 %
25 V
5%
ON
N/O operation (n.o.)
N/O operation (n.o.)
t=0s
ton1 = 0 s
ton2 = 0 s
toff = 0.5 s
0, Off
5.7 Commissioning
Prior to commissioning, check proper connection of the GM420.
After connecting a brand-new GM420 to the supply voltage, the
loop resistance response value is automatically set by the internal preset function:
(> R) = (Rm + 0,5 Ω) x 1.5
(Rm = measured loop resistance)
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35
Operation and setting
36
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6. Technical data GM420...
( )* = factory setting
Insulation coordination acc. to IEC 60664-1 / IEC 60664-3
Rated insulation voltage ....................................................................................................................................... 400 V
Rated impulse voltage/pollution degree........................................................................................................... 4 kV / III
Protective separation (reinforced insulation) between ....................... (A1, A2) - (E ,KE) - (11-12-14) - (21-22-24)
Voltage test acc. to IEC 61010-1:
(E ,KE) - [(A1-A2), (11-12-14)] ....................................................................................................................... 3.32 kV
(E ,KE) - (21-22-24) .......................................................................................................................................... 2.21 kV
(A1- A2) - (11-12-14) - (21-22-24) ............................................................................................................... 2.21 kV
Supply voltage
GM420-D-1:
Supply voltage Us ............................................................................................................... AC 16...72 V / DC 9.6...94 V
Frequency range Us ...................................................................................................................................... 15...460 Hz
GM420-D-2:
Supply voltage Us ............................................................................................................................... AC/DC 70...300 V
Frequency range Us ...................................................................................................................................... 15...460 Hz
Power consumption ......................................................................................................................................... ≤ 3.5 VA
Measuring circuit
Loop resistance Rm:
Measuring range Rm ...................................................................................................................................... 0...100 Ω
Measuring current Im ...................................................................................................................................... DC 20 mA
Measuring voltage Um ................................................................................................................................... ≤ DC 24 V
Extraneous voltage Uf:
Measuring range Uf ....................................................................................................................................... AC 0...50 V
Nominal frequency fn ................................................................................................................................... 42...460 Hz
Disconnection of the measuring loop Uf .......................................................................................................... ≥ 12 V
Reclosing of the measuring loop.......................................................................................................................... ≤ 10 V
Permissible extraneous voltage Uf ................................................................................................................. ≤ 440 V
Permissible extraneous DC voltage, without influence on the measurement ................................................... DC 0 V
TGH1413en/09.2007
37
Technical data GM420...
Response values
Loop resistance (> R) (Alarm 1) ................................................................................................................ 0.1...100 Ω
Resolution of setting R 0.1...10 Ω ...................................................................................................................... 0.1 Ω
Resolution of setting R 10...100 Ω ........................................................................................................................ 1 Ω
Preset function:
Loop resistance (> R) .......................................................................................................... = ((Rm + 0.5 Ω) x 1.5) *
Relative percentage error 0...1 Ω ..................................................................................................... ±20 %, ±1 digit
Relative percentage error 1...10 Ω ..................................................................................................... ±5 %, ±1 digit
Relative percentage error 10...100 Ω ................................................................................................. ±5 %, ±1 digit
Hysteresis (> R) ................................................................................................................................ 1...40 % (25 %)*
Extraneous voltage Uf (> U) (Alarm 2) ............................................................................................ 1...50 V (25 V)*
Resolution of setting Uf 1...50 V .......................................................................................................................... 0.5 V
Relative percentage error Uf (> U) in the range 50/60 Hz .................................................................. ±2 %, ±1 digit
Relative percentage error Uf (> U) in the range 42...460 Hz ........................................................... ±10 %, ±1 digit
Hysteresis > U ..................................................................................................................................... 1...40 % (5 %)*
Specified time
Start-up delay .......................................................................................................................................... 0...99 s (0 s)*
Response delay ton1/2 ............................................................................................................................. 0...99 s (0 s)*
Release delay toff ................................................................................................................................... 0...99 s (0.5 s)*
Operating time tae when the loop is open (R > 50 kΩ) ............................................................................... ≤ 40 ms
Operating time tae when the loop is closed (> R) ........................................................................................ ≤ 500 ms
Operating time tae if extraneous voltage Uf (> U) and overload (OL) exist ................................................ ≤ 100 ms
Response time tan .............................................................................................................................. tan = tae + ton1/2
Recovery time tb ............................................................................................................................................. ≤ 300 ms
Recovery time tb after protective disconnection.................................................................................................... ≤ 1 s
Displays, memory
Display..................................................................................................... LC display, multi-functional, not illuminated
Display range, measured value Rm ................................................................................................................ 0...100 Ω
Display range, measured value Uf ................................................................................................................ AC 0...50 V
Operating error, loop resistance 0...1 Ω ............................................................................................ ±20 %, ±1 digit
Operating error, loop resistance 1...100 Ω .......................................................................................... ±5 %, ±1 digit
Operating error, voltage in the range 50/60 Hz ................................................................................... ±2 %, ±1 digit
Operating error, voltage in the range 42...460 Hz ............................................................................. ±10 %, ±1 digit
History memory (HiS) for the first alarm value............................................................... data record measured values
38
TGH1413en/09.2007
Technical data GM420...
Password ........................................................................................................................................... off / 0...999 (off)*
Fault memory (M) alarm relay ................................................................................................................ on / off (on)*
Switching elements
Number of changeover contacts ............................................................................................................... 2 x 1 (K1, K2)
Operating principle ....................................................................................................... N/C operation / N/O operation
.. K1: Err, > R, OL, > U, tES (device error, loop resistance, measuring current disconnection: N/O operation n.o.)*
...................................................................................... K2: Err, > R, OL, > U, tES (overvoltage: N/O operation n.o.)*
Electrical service life under rated operating conditions,
number of cycles .................................................................................................................................................. 10000
Contact data acc. to IEC 60947-5-1:
Utilization category ................................................................................................. AC 13 AC 14 DC-12 DC-12 DC-12
Rated operational voltage ........................................................................................... 230 V 230 V 24 V 110 V 220 V
Rated operational current ......................................................................................................... 5 A 3 A 1 A 0.2 A 0.1 A
Minimum contact load..............................................................................................................1 mA at AC / DC ≥ 10 V
Environment / EMC
EMC ................................................................................................................................................................. IEC 61326
Operating temperature ......................................................................................................................... -25 ºC...+55 ºC
Classification of climatic conditions acc. to IEC 60721:
Stationary use (IEC 60721-3-3) ........................................................3K5 (except condensation and formation of ice)
Transportation (IEC 60721-3-2) ........................................................2K3 (except condensation and formation of ice)
Storage (IEC 60721-3-1) ...................................................................1K4 (except condensation and formation of ice)
Classification of mechanical conditions acc. to IEC 60721:
Stationary use (IEC 60721-3-3) .............................................................................................................................. 3M4
Transportation (IEC 60721-3-2) .............................................................................................................................. 2M2
Storage (IEC 60721-3-1) ......................................................................................................................................... 1M3
Connection
Connection..............................................................................................................................................screw terminals
Connection properties:
rigid/ flexible/ conductor sizes .......................................................................... 0.2...4 / 0.2...2.5 mm2 / AWG 24...12
Multi-conductor connection (2 conductors with the same cross section):
rigid/ flexible .................................................................................................................. 0.2...1.5 mm2 / 0.2...1.5 mm2
Stripping length ............................................................................................................................................... 8...9 mm
Tightening torque....................................................................................................................................... 0.5...0.6 Nm
TGH1413en/09.2007
39
Technical data GM420...
Other
Operating mode ........................................................................................................................... continuous operation
Mounting ......................................................................................................................................................any position
Degree of protection, internal components (IEC 60529)......................................................................................... IP30
Degree of protection, terminals (IEC 60529) .......................................................................................................... IP20
Enclosure material ....................................................................................................................................polycarbonate
Flammability class ............................................................................................................................................UL94 V-0
DIN rail mounting acc. to................................................................................................................................. IEC 60715
Screw fixing ......................................................................................................................... 2 x M4 with mounting clip
Software version .......................................................................................................................................... D268 V1.0x
Weight ............................................................................................................................................................... ≤ 150 g
( )* = Factory setting
6.1 Standards, approvals and certifications
6.2 Ordering information
Device
type
Measuring
range
Loop
resistance
Measuring
range
extraneous
voltage Uf
GM420-D-1
0...100 Ω
AC 0...50 V
DC 9.6 V...94 V /
B 9308 2001
AC 15...460 Hz, 16...72 V
GM420-D-2
0...100 Ω
AC 0...50 V
DC 70...300 V /
B 9308 2002
AC 15...460 Hz, 70...300 V
Supply
voltage Us
Mounting clip for screw fixing (1 piece per device, accessories)
40
Art. No.
B 9806 0008
TGH1413en/09.2007
INDEX
A
Adjustable parameters, list 19
Automatic self test 12
C
currently measured values
- Extraneous voltage 21
- Loop resistance 21
D
Delay on release toff 13
Deleting the fault alarms 18
Device features 9
Display elements in use 17
Display in menu mode 22
Display in standard mode 21
E
ENTER key 18
Example of parameter setting 24
F
factory 35
factory setting 13, 35
Fast commissioning 6
Fault memory 12
Function 9
Functional faults 12
TGH1413en/09.2007
I
Installation and connection 15
K
K1: assignment alarm category 19
K2: assignment alarm category 19
L
LED Alarm 1 lights 18
LED Alarm 2 lights 18
M
Manual self test 12
Manual, target group 5
Menu
- AL (response values) 19
- HiS (history memory for the
first alarm value) 20
- InF (hard and software version) 20
- out (output control) 19
- Set (device control) 20
- t (timing check) 20
Menu structure 19
Mounting clip for screw fixing 40
N
Notes for the user 5
41
O
Operating elements, function 18
Operation and setting 17
Ordering information 40
P
Parameter query and setting
- 22
Parameter setting
- Activating or deactivating the
password protection 32
- Assigning alarm categories to
the alarm relays 28
- Deactivating the fault memory 27
- Manual activation of the preset function 34
- Setting response values 25
- Setting the operating principle of the alarm relays 27
- Setting time delays 31
Password protection 13
Preset function 10
Protected measuring circuit 11
- Hysteresis extraneous voltage
26
- Loop resistance > R 25
- Loop resistance hysteresis 25
Starting delay t 31
Starting the menu mode 18
Start-up delay t 13
T
Technical data 37
Test button 18
Time delays 9, 12
W
Wiring diagram 16
Work activities on electrical installations 7
R
Reset button 18
Response delay ton 13, 31
S
Setting response values
- Extraneous voltage (> U) 26
42
TGH1413en/09.2007
Bender Inc.
USA:
700 Fox Chase
Coatesville, PA 19320
Toll Free: 800-356-4266
Phone: 610-383-9200
Fax: 610-383-7100
E-mail: info@bender.org
Canada:
5810 Ambler Drive, Unit 1
Mississauga, ON L4W 4J5
Toll Free: 800-243-2438
Phone: 905-602-9990
Fax: 905-602-9960
E-mail: info@bender-ca.com
Web: http://www.bender.org
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