Terminal Assignment - Siemens 3TK28 Manual

Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3.8.2.4

Terminal assignment

A1
A2
Y11; Y12
Y21; Y22
Y20
Y33; Y34
13 - 14
Auxiliary contact units
1)
Figure 3-68
144
Terminal
L/+
N/-
Channel 1, EMERGENCY STOP or position switch
Channel 2, EMERGENCY STOP or position switch
Parameterization "single-channel sensor connection"
ON button feedback circuit
Contact units (see contact units graphic)
Contact units
Description
Manual, 07/2016, NEB926157502000/RS-AB/003
3TK28 safety relays