Installation and connection
29
isoLR275_D00127_00_M_XXEN/07.2018
Legend wiring diagram:
1
Supply voltage
U
S
(see nameplate) via 6 A fuse;
For UL and CSA applications, it is mandatory to use 5 A fuses.
2, 3
Connection to the 3 AC system to be monitored:
Connect the 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 (N/O contact)
*8
External "RESET" button (N/C 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, the insulation resistance is not
measured. Disconnection from the IT system
10
Current output, electrically isolated:
0…20 mA or 4…20 mA
11
Serial interface RS-485 (termination with a 120 Ω resistor)
12
Alarm relay 1; available changeover contacts
13
Alarm relay 2 (device error relay); available changeover contacts
*
The wiring of the terminal pairs 7, 8 and 9 must be carried out gal-
vanically isolated from each other and must not have a
connection to PE!
