Bender ISOMETER IRDH575, Manual

Page: 31 / 120

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