Connection
30
IRDH275_D00122_02_M_XXEN/10.2016
Only one ISOMETER
®
may be connected to an external TEST or RESET button.
A galvanic parallel connection of several TEST and RESET inputs for collective
testing of ISOMETER
®
s is not permitted.
External coupling devices connected via the terminal AK cannot be switched
off via the internal coupling relays. If no coupling device is used, the terminal
AK remains free.
L1
L2
L3
2
3
4
5
U
n
3 AC - System
L2
L1
L+
L-
DC - System
L2L1
U
n
L1
L2
AC - System
L2L1
U
n
-
/~
+/~
PE
A1/+ A2/- L1 L2 AK KE
T1 T2 R1 R2 F1 F2 M+ M- A B 11 12 14 21 22 24
IRDH275(B)
mA
120W
K1
K2
1
6
7 8 9 10 11 12 13
U
s
U
n
L1
L2
L3
3/N AC - System
L2L1
N
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