130116 v3.2
Operating Instructions SG-EFS 1X4 ZK2/1 8k2
Page 7/15
Polymer Electric
The single-fault-safe electronics module has dual channels (redundant). Each
channel controls a forceguided relay and additionally monitors the relay of the other
channel. The electronic system monitors the electrical resistance of the sensor with
a defined zero signal current.
When the sensor is not actuated and after a reset, the relays K1 and K2 are en-
ergised. The yellow LEDs “K1 ON“ and “K2 ON“ are on, the switching channels 1
and 2 are closed and the signal circuit is open. When the sensor is actuated, the K1
and K2 relays are de-energised. The yellow LEDs “K1 ON“ and “K2 ON“ go out, the
switching channels 1 and 2 are open, and the signal circuit is closed.
If the sensor cable breaks, relays K1 and K2 are de-energised. The yellow LEDs
“K1 ON“ and “K2 ON“ go out, the switching channels 1 and 2 are open, and the sig-
nal circuit is closed.
The signal circuit works opposed to the switch channels 1 and 2.
Impaired operation due to overheating or incorrect degree of protection
The operation of the protective device may be impaired due to overheating of the
Control Unit or due to incorrect choice of degree of protection.
Ä
When installing in the switch cabinet, ensure sufficient distance from hest
sources (at least 2 cm)
Ä
Only use the Control Unit in zones that have a min. protection class of IP54
(eg. switch cabinet)
Function
Function, installation and commissioning
Installation
Danger of injury due to electrocution!
Ä
Disconnect all devices and live parts in the immediate environment of the
power supply and protect them against being switched on again (see relevant
operating instructions).
Ä
Check that all devices and parts are disconnected from the power supply.
WARNING
CAUTION