Bender ISOMETER isoCHA425HV Manual page 19

For details about the required conductor cross sections, refer to chapter "Technical data", page 42.
Wiring diagram legend:
Terminal
A1, A2
E, E, KE
L1/+, L2/–
Up, AK1, GND, AK2
T/R
11, 14
11, 24
A, B
* For UL and CSA applications:
Feed the supply voltage U
For UL applications:
Only use 60/75 °C copper lines.
Connection to the supply voltage U
If supplied from an IT system, both lines have to be protected by a fuse.*
Connect each terminal separately to PE:
Use the same wire cross section as for "A1", "A2".
Connection to IT system to be monitored
Connect the terminals of the AGH to the corresponding terminals of the ISOMETER®.
Connection for external combined test and reset button
Connection to alarm relay "K1"
Connection to alarm relay "K2"
RS-485 communication interface with selectable terminating resistance
via 5 A back-up fuses.
S
Connections
via fuse:
s
isoCHA425HV_D00404_04_M_XXEN/10.2023
ISOMETER® isoCHA425HV
19