Connection
31
IRDH275_D00122_02_M_XXEN/10.2016
Legend to wiring diagram:
1
Supply voltage U
s
(see nameplate) via 6 A fuse
For UL and CSA applications, the use of 5 A fuses is mandatory
2, 3
Connection to the 3AC system to be monitored:
connect terminals L1, L2 to neutral conductor N or
terminals L1, L2 to conductor L1, L2
4
Connection to the AC system to be monitored:
connect terminals L1, L2 to conductor L1, L2
5
Connection to the DC system to be monitored:
connect terminal L1 to conductor L+, terminal L2 to conductor L-
6
Separate connection of and KE to PE
*7
External TEST button (NO contact)
*8
External RESET button (NC contact or wire jumper),
when the terminals are open, the fault message will not be stored
*9
STANDBY by means of the function input F1, F2:
When the contact is closed, insulation measurement does not take
place;
system disconnection
10
IRDH275: current output, galvanically separated: 0…400 μA
IRDH275B: current output, galvanically separated:
0…20 mA or 4…20 mA
11
Serial interface RS485 (termination 120 Ω resistor)
12
Alarm relay 1; changeover contacts provided
13
Alarm relay 2; (device fault relay) changeover contacts provided
*
The terminal pairs 7, 8 and 9 must be wired galvanically isolate
and must not have a connection to PE !
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