Siemens 3TK28 - Structure 3 TK2840; Terminal Assignment

Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003
111
3.7.1.3
Structure 3TK2840
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③
Labels
3.7.1.4
Terminal assignment
Terminal
Description
A1
L/+
A2
N/-
Y11; Y12
Channel 1, EMERGENCY STOP or position switch
Y21; Y22
Channel 2, EMERGENCY STOP or position switch
Y20
Parameterization "single-channel sensor connection"
Y33; Y34
ON button, feedback circuit
14; 24
Solid-state outputs