Bender ISOMETER isoCHA425 Kurzanleitung Seite 20

Wiring diagram legend
Terminal
Connection to the supply voltage via fuse (line protection):
A1, A2
If supplied 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.
L+, L– Connection to IT system to be monitored
T/R Connection to the external combined Test/Reset button
11, 14 Alarm relay K1 terminal
11, 24 Alarm relay K2 terminal
RS-485 communication interface with switchable termination resis-
A, B
tor, e.g. COM465IP
20
* For UL applications:
Only use 60/75°C copper lines!
For UL and CSA applications, it is mandatory to use fuses
rated above 5A to protect the supply voltage.
Connections
isoCHA425_D00352_00_Q_DEEN/04.2018