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Meaning Of The Led Indicators - Siemens 3TK2845 Manual

Safety relays, multifunction device
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Mounting, Wiring, Initial Start-up
4.3

Meaning of the LED Indicators

Nine LEDs indicate the operating status and the function of the device.
Display during self-test:
2 s lamp test: all LEDs light up, i.e. the two-color "DEVICE" LED lights up yellow
and then the device LED blinks green for approximately 4 seconds.
LED
Device
OFF
Green
Green blinking Self-test after restart
Red
Red blinking
14 -- 13
OFF
Green
24
Off
Green
Green blinking Feedback circuit open
34 -- 33
OFF
(38 -- 37)
Green
44 (48)
OFF
Green
Green blinking Feedback circuit open
Y 12/22
OFF
Green
Green blinking Cross-circuit at the input (device blinks red),
Y 42/52
OFF
Green
Green blinking Cross-circuit at the input (device blinks red),
Y 72/82
OFF
Green
Table 4-1:Meaning of the LED Display
4-6
No supply voltage / supply voltage too low or internal fuse tripped.
Supply voltage in permissible operating range
Device defective → exchange device
Sensor fault (cross-circuit, configuration changed during operation)
→ remedy fault and restart device
Output passive
Output active
Output passive
Output active
Output passive
Output active
Output passive
Output active
Input passive (switch-on condition not fulfilled)
Input active
If the device LED flashes red: Configuration has been changed
during operation.
Sensor simultaneity not fulfilled
Input passive (switch-on condition not fulfilled)
Input active
If the device LED flashes red: Configuration has been changed
during operation.
Sensor simultaneity not fulfilled
Input passive
Input active
Meaning
3TK2845 Multifunction Device Manual
GWA 4NEB 926 2087-22 DS 01

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