Bender ISOMETER IR157 Series Quick Start Manual page 9

®
connected and functions reliably !
In order to check the proper
connection, a functional test
using a suitable resistance is
to be carried out.
Size of the resistance:
50% of the preset response
value Alarm 2.
Do both alarm LEDs light up?
Did the alarm relays switch ?
yes
Remove the resistor !
Alarm LEDs extinguished ?
Did the output relays change
their position ?
yes
The IR157x is correctly
IR157x_D00417_01_Q_DEEN / 02.2024
ISOMETER® IR157x
Check the connecting leads !
no
Is voltage Un applied to the
terminals L1/L2 ?
Check the voltages with a voltmeter !
Do both alarm LEDs light ?
Did the alarm relays switch?
yes
no
9