Siemens SIRIUS 3RK3 - 3 RK3 Basic Central Unit

Safety ES software
The 3RK3 MSS is parameterized with the Safety ES software, see Chapter "3RK3 Modular Safety
System (Page 33)".
5.1.3 3RK3 Basic central unit
Figure 5-2 3RK3 Basic central unit
Properties
The 3RK3 Basic central unit is the basic component of an MSS 3RK3 con󹪝guration for safety-
related control functions. It can be used up to SIL 3 per EN 61508 and PL e/Cat. 4 per
EN ISO 13849-1.
• The 3RK3 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. Diagnostics data of the MSS 3RK3 is also transmitted to the PLC.
• The 3RK3 central unit is supplied with a memory module (sealable with central unit or control
cabinet).
• Up to 7 expansion modules can be connected to the 3RK3 Basic central unit.
• Connection of the diagnostics display is possible as an option for time-saving diagnostics.
Inputs and outputs
The 3RK3 Basic central unit has the following inputs and outputs:
• 8 safety-related, freely parameterizable sensor inputs
• 1 safety-related two-channel relay output
• 1 safety-related two-channel semiconductor output
• 2 test outputs for sensor supply and monitoring when used with safety-related sensor inputs
Description of the hardware
5.1 Description of the individual modules
SIRIUS 3RK3 Modular Safety System
76 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006