KROHNE LS 4100 EN - Manual (Page 11)

03/2002 LS 4100/LS 4150 11
3.2 Wiring plan
Floating transistor output (SW E72 T)
Power supply: 10 … 55 V DC (for further information see the following connection examples as
well as technical data)
To determine the switching status of the transistor output (mode A/B), the supply cable (terminals
1 and 4) must be polarised respectively.
Mode A
Mode B
Max. detection or overfill protection: Min. detection or dry run protection:
- terminal 1: + - terminal 1: –
- terminal 4: – - terminal 4: +
Through different connections of the consumer (load), NPN or PNP action can be preset. Take
care that during connection, terminal 2 has always a more positive voltage potential than terminal
3.
Connection examples
The transistor switches the supply voltage of the oscillator to the binary input of a PLC or to an
electrical load.
Mode A Mode B
NPN action PNP action NPN action PNP action
The transistor switches a second voltage source with the same reference potential to the binary
input of a PLC or to an electrical load.
Mode A Mode B
NPN action PNP action NPN action PNP action
U
B
U
B
U
B
U
B
U
B
U
B
U
B
U
B
U
B
U
B
U
B U
B
U
B
U
B
U
B
U
B