Siemens SIRIUS 3RK3 - Startup; Self-Test of the MSS 3 RK3 Basic; 3 RK3 Advanced Central Unit

5.1.3.1 Startup / self-test of the MSS 3RK3 Basic
Once the power supply has been applied, the MSS 3RK3 runs a self-test. During the self-test
phase, all the LEDs on the MSS 3RK3 central unit light up for two seconds (lamp test). Two-color
LEDs light up yellow. The 3RK3 Basic central unit then loads the con󹪝guration from the external
memory module and checks whether a valid con󹪝guration or parameterization is stored and
automatically switches to safety mode (DEVICE LED lights up green).
Con󹪝guring mode
The 3RK3 Basic central unit enters con󹪝guring mode (the DEVICE LED lights up yellow) when:
• No con󹪝guration exists,
• The TARGET con󹪝guration di󹪜ers from the ACTUAL con󹪝guration (the SF LED lights up red)
• The modules could not be parameterized (the SF LED lights up red)
• The existing con󹪝guration has not been released.
• The memory module is missing or defective. In this case, only diagnostics of the MSS 3RK3
is possible (DEVICE LED 󹪞ashes red, SF LED lights up red).
5.1.4 3RK3 Advanced central unit
Figure 5-4 3RK3 Advanced central unit
Properties
The 3RK3 Advanced central unit is a basic component of an MSS 3RK3 con󹪝guration for safety-
related control functions with use of AS‑Interface. As an AS‑i monitor, the 3RK3 Advanced
central unit can monitor sensor inputs in the lower 󹪝eldbus level and also shut down safety
circuits through its outputs. It can be used up to SIL 3 per EN 61508 and PL e/Cat. 4 per
EN ISO 13849-1.
• The 3RK3 Advanced central unit can be parameterized using Safety ES.
• An additional interface module (e.g. DP interface) can be used to exchange process data with
a PLC. Diagnostic data of the MSS 3RK3 are also transmitted to the PLC.
Description of the hardware
5.1 Description of the individual modules
SIRIUS 3RK3 Modular Safety System
80 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006