Bender ISOMETER IRDH575 Manual page 31

Connection
Legend to wiring diagram :
For external indicating instrument:
1
current output 0...20 mA or 4...20 mA
External TEST button (NO contact)
*2
External RESET button (NC contact or wire jumper),
*3
(with the terminals open and the ISO-SETUP menu set to Memory: off,
insulation fault alarms will not be stored).
STANDBY
*4
When the contact is closed, insulation measurement does not take place;
system disconnection
S1 = ON : RS-485 interface (A/B) is terminated with 120 Ω resistor
5
S2 = unassigned)
Serial interface RS-485 (A/B)
6
System fault relay K3 (device fault and EDS Alarm) (Addr.: 1);
7
N/C operation (fixed setting)
Alarm relay K2 (insulation fault 2); changeover contacts provided
8
Alarm relay K1 (insulation fault 1); changeover contacts provided
9
Supply voltage U
10
For UL and CSA applications, the use of 5 A fuses is mandatory
Connection to the 3 AC system to be monitored:
11
connect terminals L1, L2, L3 to conductor L1, L2, L3
Connection to the AC system to be monitored:
12
terminal L1 to conductor L1and
terminal L2, L3 to conductor L2
Connection to the DC system to be monitored:
13
terminal L1 to conductor L+ and
terminals L2, L3 to conductor L-
14
Separate connection of
*
The terminal pairs 2, 3 and 4 must be wired so that they are
galvanically isolated and must not have a connection to PE.
IRDH575_D00089_05_M_XXEN/01.2020
(see nameplate) via 6 A;
S
and KE to PE
32