Siemens 3TK28 - Structure 3 TK2842; Terminal Assignment

Description of the individual safety relays
3.7 3TK28 safety relays with solid-state enabling circuits
3TK28 safety relays
128 Manual, 07/2016, NEB926157502000/RS-AB/003
3.7.3.3
Structure 3TK2842
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③
Time setting
④
Labels
3.7.3.4
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
Y35
with / without cross-circuit detection
Y32
Parameterization "single-channel sensor connection"
Y34
ON button, feedback circuit
1
Cascade input
14
Safe solid-state output
28
Safe solid-state output, delayed