Siemens SIRIUS 3RK3 - 3 RK3 Asisafe Basic Central Unit

5.1.5 3RK3 ASIsafe basic central unit
Figure 5-6 3RK3 ASIsafe basic central unit
Properties
The 3RK3 ASIsafe 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 ASIsafe basic
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 ASIsafe basic 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.
• The 3RK3 central unit is supplied with a memory module (sealable with central unit or control
cabinet).
• Connection of the diagnostics display is possible as an option for time-saving diagnostics.
• Connection to AS-Interface is possible for safety-related and non-safety-related data
exchange.
• The 3RK3 ASIsafe basic central unit is suitable for AS-i Power 24 V.
Note
No expansion modules can be connected to the 3RK3 ASIsafe basic central unit.
Inputs and outputs
The 3RK3 ASIsafe basic central unit has the following inputs and outputs:
• 2 safety-related, freely parameterizable sensor inputs
• 6 standard inputs
• 1 safety-related two-channel relay output
Description of the hardware
5.1 Description of the individual modules
SIRIUS 3RK3 Modular Safety System
86 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006