Bender ISOMETER isoUG425 Kurzanleitung Seite 23

Wiring diagram legend
Terminal Connections
Connection to the supply voltage via fuse (line protection). If sup-
A1, A2
plied from an IT system, both lines have to be protected by a fuse.
Connect each terminal separately to PE.
E, KE
The same wire cross section as for A1, A2 is to be used.
Connection to the DC system to be monitored
L+, L–
Connection to the external combined test and reset button
T/R
Alarm relay K1 terminal
11, 14
Alarm relay K2 terminal
11, 24
RS-485 communication interface with switchable termination
A, B
resistor
isoUG425_D00220_02_Q_DEEN / 05.2018
* For UL applications:
Only use 60/75°C copper lines! For UL and CSA applications,
it is mandatory to use fuses rated over 5 A to protect the
supply voltage.
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