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
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Figure 3-62 Safety shutdown mat, autostart (2-channel)
Figure 3-63 Cascading, EMERGENCY STOP + protective door monitoring, (2-channel)