Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
178
Manual, 07/2016, NEB926157502000/RS-AB/003
3TK2856-.B...
3TK2857-.B...
Control supply voltage 1 for DC final rated value
•
for DC rated value
V 24
Operating range factor control supply voltage rated value
of the magnet coil
•
at 50 Hz
–
for AC
—
—
•
at 60 Hz
–
for AC
—
—
•
for DC
0.85
1.1
Product function
•
automatic start
No
•
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
No
•
standstill monitoring
No
•
step mat monitoring
No
•
monitored start-up
No
Acceptability for application
•
safety-related circuits
Yes
•
safety cut-out switch
Yes
•
magnetically operated switches monitoring
No
•
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