Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
160 Manual, 07/2016, NEB926157502000/RS-AB/003
A2 N/-
Channel 1, EMERGENCY STOP or position switch
Y21; Y22 Channel 2, EMERGENCY STOP or position switch
with / without cross-circuit detection
Parameterization "single-channel sensor connection"
ON button, feedback circuit
Safe solid-state output (24V DC / 1A)
Power supply for external switches
Input for functional switching
1)
Figure 3-75 Contact units