General Device Features; Function Description - Siemens SIRIUS 3SK1 Manual

5.2.3

General device features

Device properties:
● 4-way DIP switch for function setting (parameterization)
● SET/RESET button
● 4 LEDs for status and function display
● 2 sensor inputs (channels 1 and 2)
● 1 input (cascading circuit)
● 1 input (START pushbutton circuit)
● NO contact/NC contact evaluation via external jumper (T1/PAR)
● Connecting interface for 3ZY12 device connectors
● Removable terminals
5.2.4

Function description

There is a 4-way DIP switch for function setting and 4 LEDs for status and function display
on the front of the 3SK1 Advanced basic units. A SET/RESET button can be used to load
function settings and to perform a device restart (reset). On commissioning, the devices runs
a self-test in which the internal electronics and firmware are checked for correct functioning.
All internal parts of the circuit are cyclically monitored for faults during operation. In the case
of units with semiconductor outputs, they cyclically run through a light/dark test for up to
2.5 ms (dynamically) to verify their correct functioning. The safety relays can be expanded
using 3ZY12 device connectors with input and output expansions.
3SK1 Advanced basic unit time-delayed only:
These basic units have two time-delayed and two instantaneous safety-related outputs (NO
circuits) or outputs switching to P potential.
Four LEDs and one DIP switch indicate the operating state and functioning of the device:
● (1) DEVICE
● (2) OUT
● (3) IN
● (4) SF
The four LEDs show the following:
● Operating mode: Diagnostics
● Configuration mode: DIP setting
For an explanation of the operating state display, see Section Display and diagnostics
(Page 199)
SIRIUS 3SK1 safety relays
Manual, 06/2018, A5E02526190021A/RS-AD/004
3SK1 devices
5.2 3SK1 Advanced
63