Siemens SIRIUS 3RK3 - MSS 3 RK3 System Components

3.5 MSS 3RK3 system components
Central units
For each system con󹪝guration, you require a 3RK3 central unit that you select appropriately for
the speci󹪝c application (e.g. 3RK3 Basic). For executing the safety functions, the 3RK3 central
unit contains the parameterization data in a plug-in memory module. You can optionally
connect the expansion modules and the interface module or the diagnostic display to the 3RK3
central unit.
The following table lists the properties of the 3RK3 central units:
Central unit Inputs / outputs Maximum number
of expansion mod‐
ules
3RK3 Basic
Central unit with safety-
related 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
7
3RK3 Advanced
Central unit with safety-
related inputs and out‐
puts;
AS-i connection;
Monitor functionality;
Simulation of AS‑i slaves
• 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
• Connection for AS-i bus
9
3RK3 ASIsafe basic
Central unit with safety-
related inputs and out‐
puts;
AS-i connection;
Monitor functionality;
Simulation of AS‑i slaves
• 2 safety-related, freely parameterizable sensor inputs
• 6 standard inputs (not safety-related)
• 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
• Connection for AS-i bus
0
3RK3 ASIsafe extended
Central unit with safety-
related inputs and out‐
puts;
AS-i connection;
Monitor functionality;
Simulation of AS‑i slaves
• 4 safety-related, freely parameterizable sensor inputs
• 4 standard inputs (not safety-related)
• 1 safety-related two-channel relay output
• 1 safety-related two-channel semiconductor output
• Connection for AS-i bus
2
Expansion modules
You need expansion modules to adapt the MSS 3RK3 to the required application. You thereby
supplement the 3RK3 central unit with additional inputs and outputs.
Overview
3.5 MSS 3RK3 system components
SIRIUS 3RK3 Modular Safety System
42 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006