17
5 Connecting to power supply
OPTISWITCH 3100 C • Relay (DPDT)
29953-EN-210702
1
4
4
4
2
3
Fig. 9: Material versions, single chamber housing
1 Plastic (not with Ex d)
2 Aluminium
3 Stainless steel (not with Ex d)
4 Filter element for pressure compensation (not with Ex d)
We recommend connecting OPTISWITCH 3100 C in such a way that
the switching circuit is open when there is a level signal, line break or
failure (safe state).
The relays are always shown in non-operative condition.
3
2
1
Fig. 10: Wiring plan
1 Relay output
2 Relay output
3 Voltage supply
If inductive loads or stronger currents are switched through, the gold
plating on the relay contact surface will be permanently damaged.
The contact is then no longer suitable for switching low-voltage
circuits.
Inductive loads also result from the connection to a PLC input or
output and/or in combination with long cables. It is imperative that you
take measures to extinguish sparks to protect the relay contact (e.g. Z
diode) or use an electronic version with transistor output.
Housing overview
Wiring plan
Connection to a PLC
