Manual VEK S4
22 03/09 FEIG ELECTRONIC GmbH
7.2 Loop connections
Loop 1 Loop 2
Loop 3 Loop 4
7.3 2x5-pole pin connector for ribbon cables
Front view
RS485 A- 10
zz
9 RS485 B+
CAN Low 8
zz
7CAN High
Synchronization 6
zz
5GND
GND 4
zz
3GND
24 V 2
zz
1 24 V
The ribbon cable connection is used to synchronize the detectors with each other and to provide the supply
voltage and interface connection. The supply and interface connection to the control device can be made
either using the ribbon cable or a plug terminal (see 7.1 Power supply and interface screwless terminals).
7.4 Outputs
OC1 OC2 OC3 OC4
The Open-Collector outputs are short-circuit protected. When a signal is output the outputs switch on (Low
active).
Vbb
U
45V
Last
OC1...4
7.5 PE connection
Overvoltages on the loop inputs are diverted to PE using the integrated gas tube arrester. For this there is a
function ground contact on the enclosure bottom (see also 5.2 Opening the case– Part D), which connects
the inserted circuit board with the DIN rail. When the circuit board is inserted, be sure that contact surface C
fits in the PE contact spring D of the enclosure! The DIN rail must be connected to PE in the system with low
impedance !
Noise immunity of the VEK S4 cannot be guaranteed without a PE connection to the DIN rail !
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