Bender A-ISOMETER IRDH375 - Response Values Alarm1 and Alarm2; Operating Principle of the Alarm Relays; Memory Setting; Current Output

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Operation and setting
Response values Alarm1 and Alarm2
The response values Alarm1 and Alarm2 are set with the arrow keys
TEST RESET
and
stored with the ENTER key
MENU
.
Operating principle of the alarm relays
K1 : NC = N/C operation contacts 11-12-14
(the alarm relay is in fail-safe mode)
K1 : NO = N/O operation contacts 11-12-14
(the alarm relay is deenergized during normal operation)
K1 : Flash = fl ashing function contacts 11-12-14
(the alarm relay and the LED fl ash in the event of an alarm
message approx. 0.5 Hz)
K2 : NC = N/C operation contacts 21-22-24
(the alarm relay is in fail-safe mode)
K2 : NO = N/O operation contacts 21-22-24
(the alarm relay is deenergized during normal operation)
K2 : Flash = fl ashing function contacts 21-22-24
(the alarm relay and the LED fl ash in the event of an
alarm message approx. 0.5 Hz)
Memory setting
Memory: on = Fault memory is activated
Reset the device using the reset button after clearing the
fault.
Memory: off = Fault memory deactivated (factory setting)
Current output
The current output of the IRDH375B can be set to „0-20 mA“ or „4-20 mA“via
the submenu „M+/M-:“. The maximum load is 500 Ohm.
Function 0-20 mA:
Rf= insulation fault, I= current in mA
Function 4-20 mA:
Rf= insulation fault, I= current in mA
B
B
B
B
B
B
R
f
=
20 mA x 120 kOhm
I
- 120 kOhm
R
f
=
16 mA x 120 kOhm
I - 4 mA
- 120 kOhm