Siemens 3TK28 - Structure of the 3 TK2810-0; Terminal Assignment

Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003
23
3.6.1.3
Structure of the 3TK2810-0
Front view
No.
Meaning
①
Display LEDs
②
Removable terminal blocks
③
Time setting
④
Labels
3.6.1.4
Terminal assignment
Terminal
Description
A1
L/+ control supply voltage U
s
A2
N/- control supply voltage U
s
A3
24 V DC power supply to signaling outputs
A4
Ground for signaling outputs
L1, L2, L3
Signal inputs
X1, X2, X3
Control terminals
11, 12
NC contact, positive-action, enabling circuit
23, 24; 33, 34; 43, 44
NO contact, positive-action, enabling circuit
51, 52, 54
Signaling output, changeover contact
64
Signaling output "enable"
74
Signaling output "fault"