The following security systems are incorporated for sending commands without interference:
•
PU4 must enable the supply voltage P12_R
•
Relays are operated on a 2-pole basis
Signal Output from IFC-S Module
The messages are transmitted via the relays K5 to K12. These relays are identical with those relays on the IFC-
D module. For 7 relays, one change-over contact per relay is brought out. The contact of relay K5 can be used
as a make contact or break contact with jumper X42. All 8 signal relay contacts have a common root (3A1).
The PU4 must enable the excitation voltage P12_R of the relay coils.
[dwcsem36-051011-01.tif, 1, en_US]
Figure 8-10
Block Diagram of the Output Circuit of IFC-S
Pinout of the IFC-x Module
The interface modules must be connected from the protective relay to the connector X1 (modular terminal
block). The cable cross section must be up to 1.5 mm
2
. At least 2 cables must be tied immediately at the
terminals.
8.1.10
8.1.11
Interface Command Module
8.1 General Information
326
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020