Bender ISOMETER isoEV425 Manual page 27

Installation, connection and commissioning
Wiring diagram legend:
Terminal
Connection to the supply voltage U
A1, A2
If supplied from an IT system, both lines have to be protected by a
fuse.*
Connect each terminal separately to PE:
E, E, KE
The same wire cross section as for
L1/+, L2/– Connection to the 3(N)AC, AC or DC system to be monitored.
Up, AK1, Connect the terminals of the AGH420 to the corresponding
GND, AK2 terminals of the ISOMETER®.
T/R Connection for external combined test and reset button.
11, 14 Connection to alarm relay
11, 24 Connection to alarm relay
RS-485 communication interface with selectable terminating resist-
A, B
ance.
isoEV425_D00126_09_M_XXEN/03.2019
* For UL applications:
Only use 60/75°C copper lines!
UL and CSA applications require the supply voltage U
protected via 5 A fuses.
Connections
via a fuse:
s
" " " "
A1 , A2
" "
K1
" "
K2
is to be used.
s
to be
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