Siemens SIRIUS 3SK1

Display and diagnostics
12.1 LED display
3SK1 safety relays
188 Manual, 04/2013, A5E02526190021A/RS-AA/01
LED Display Explanation
OFF* Start conditions not fulfilled
Configuration mode DIP (3) position: left
Green Start conditions fulfilled
Power-up: hardware test
Green flashing
• For 1x2-channel: Simultaneity of sensors not fulfilled
• For two-hand operation: time monitoring violated
• For monitored start: START button not yet pressed
Short-circuit on the SET/RESET button
Yellow Power-up DIP (3) position: right
Yellow flashing Short-circuit of T1/T2 to ground or 24 V
With input expansion: missing enabling signal of input expansion
Group error: Cross-circuit at input
Configuration mode DIP (3) position: right
Flickering yellow Configuration mode: Special configuration, two-hand operation
(3) IN
Flickering red Configuration mode: impermissible configuration
OFF* No group error
Configuration mode DIP (4) position: left
Green Power-up: hardware test
Green flashing Short-circuit on the SET/RESET button
Yellow Power-up DIP (4) position: right
Yellow flashing Configuration mode DIP (4) position: right
Red Group error (e.g. cross-circuit at input, short-circuit to P, device
configuration changed)
(4) SF
Red flashing Error message (e.g. short-circuit T1/T2, violation of simultaneity, violation
of time monitoring two-hand operation, feedback circuit error, START-
button pressed too long)
* LED flashes briefly in configuration mode due to lamp test