Bender ISOMETER IRDH275 Handbuch Seite 123

Connection
Legend to wiring diagram:
1 Supply voltage U
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
*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 (only IRDH275B)
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 so that they are
galvanically isolated and must not have a connection to PE!
IRDH275_D00122_03_M_XXEN/05.2017
(see nameplate) via 6 A fuse
s
and KE to PE
31