Fig. 2-8: Pin Assignment With Circuit Examples - Siemens ecofast 3RK1702-2GB18-0AA1 Manual

2.6 Digital inputs
Definition
The motor starter has 2 digital inputs, which you can connect directly to sen-
sors (PNP) using 2-wire and 3-wire technology.
M12, 5-pole plug connectors are used for this.
M12, 5-pole jacks are fitted on the motor starter.
Pin assignment
The pin assignment is arranged in accordance with the standardized Y2
assignment and the examples for 2- and 3-wire circuits:
1
4
+ 24 V
IN.1
+ 24 V
IN.2

Fig. 2-8: Pin assignment with circuit examples

Attention
The digital inputs are short-circuit-proof. The current is limited to a
maximum of 200 mA. In the event of a short-circuit or overloading of the
sensor supply, the switching element (motor) and brake output are deactiva-
ted and a general fault is issued. You must acknowledge this fault with trip
reset.
Attention
Do not use an external power supply because otherwise there will be a risk
of short-circuits.
ECOFAST Motor Starters
GWA 4NEB 950 5221-12 DS 02
Sockets, M12, 5-pole
2
3
5
IN.1/2
IN.2
1 2
4 3
0 V
IN.2
---
1 2
4 3
0 V
Wiring and interfaces
Example:
2-wire circuit
+ 24 V
1
2
4 3
IN
Example:
3-wire circuit
+ + 24 V
1 2
Out
4 3
IN
0 V
–
2-13