Description of the individual safety relays
3.8 3TK28 safety relays with contactor relay enabling circuits
3TK28 safety relays
174
Manual, 07/2016, NEB926157502000/RS-AB/003
3.8.4.5
Display of the operating state
The operating state and functioning of the device are indicated by three LEDs:
●
POWER
●
RUN
●
FAULT
Operating state of 3TK2856/57
= off
= on
= flashing
LED
Operation
POWER RUN
FAULT EMERGENCY
STOP
Op. switching
Contactors
Output 2
Cause
Self-test on startup approx. 7 s
Closed
Closed
On
On
Normal operation
Open
Off
Contactors off
Open
Off
Open
EMERGENCY
STOP
For 3TK2857 only
Open
-
On
Off
Time elapsed
Fault
•
Fault in electronics
•
Contactor welded
Off
-
Supply voltage missing
Содержание 3TK28
Страница 188: ...Mounting 4 4 Disassembling the device 3TK28 safety relays 188 Manual 07 2016 NEB926157502000 RS AB 003 ...
Страница 204: ...Dimension drawings 6 1 Dimension drawings 3TK28 3TK28 safety relays 204 Manual 07 2016 NEB926157502000 RS AB 003 ...
Страница 206: ...Accessories 3TK28 safety relays 206 Manual 07 2016 NEB926157502000 RS AB 003 ...