Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
44 Manual, 07/2016, NEB926157502000/RS-AB/003
• automatic start
Yes
• rotation speed monitoring
No
• laser scanner monitoring
No
• light grid monitoring
No
• light barrier monitoring
No
• magnetic switch monitoring Normally closed
contact-Normally open contact
No
• magnetic switch monitoring Normally closed
contact-Normally closed contact
Yes
• emergency stop function
Yes
• protective door monitoring
Yes
• standstill monitoring
No
• step mat monitoring
No
• monitored start-up
Yes
Acceptability for application
• safety-related circuits
Yes
• safety cut-out switch
Yes
• magnetically operated switches monitoring
Yes
• EMERGENCY-OFF circuit monitoring
Yes
• proximity switches monitoring
No
• opto-electronical protection device monitoring
No
• position switch monitoring
Yes
• tactile sensor monitoring
No
• valve monitoring
No
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