Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
144 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
Parameterization "single-channel sensor connection"
ON button feedback circuit
Contact units (see contact units graphic)
1)
Figure 3-68 Contact units
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