Wiring Diagram Legend - Bender ISOMETER isoUG425 Quick Start Manual

Wiring diagram legend

Terminal Connections
Connection to the supply voltage U
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
L+, L–
Connection to the DC system to be monitored
T/R
Connection to the external combined test and reset button
11, 14
Alarm relay
11, 24 Alarm relay
RS-485 communication interface with switchable termination
A, B
resistor
isoUG425_D00220_02_Q_DEEN / 05.2018
" "
K1 terminal
" "
K2 terminal
* 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 U
via fuse (line protection). If sup-
s
" " " "
A1 , A2 is to be used.
.
s
23