Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
Manual, 07/2016, NEB926157502000/RS-AB/003
177
3TK2856-.B...
3TK2857-.B...
Number of outputs as contact-affected switching element
as NO contact safety-related
•
as contact-affected switching element as NC contact for
reporting function instantaneous switching
1
0
•
as contact-affected switching element as NO contact
safety-related instantaneous switching
6
0
•
as contact-affected switching element as NO contact
safety-related delayed switching
0
3
•
as contact-less semiconductor switching element
–
for reporting function
–
non-delayed
0
–
delayed switching
0
–
safety-related
–
non-delayed
1
–
delayed switching
0
Stop category according to DIN EN 60204-1
0
1
Design of the input
•
cascading-input/functional switching
Yes
•
feedback input
Yes
•
start input
Yes
Design of the electrical connection jumper socket
Yes
Switching capacity current
•
at AC-15 at 24 V
A 4
—
•
of the NO contacts of the relay outputs
–
at AC-15 at 230 V
A 6
–
at DC-13 at 24 V
A 10
•
of the NC contacts of the relay outputs at AC-15
–
at 115 V
A 6
–
at 230 V
A 6
Thermal current of the contact-affected switching element
maximum
A —
Electrical operating cycles as operating time typical
—
Mechanical operating cycles as operating time typical
30 000 000
Design of the fuse link for short-circuit protection of the
NO contacts of the relay outputs required
gL/gG: 10 A
Type of voltage of the controlled supply voltage
DC
Control supply voltage frequency 1 rated value
Hz —
Control supply voltage frequency 2 rated value
Hz —
