Siemens SIRIUS 3RK3 - Connecting to the AS-I Master Via AS-Interface; 3 RK3 Central Unit with AS-I Interface

6.5 Connecting to the AS-i master via AS-Interface
6.5.1 3RK3 central unit with AS-i interface
Three central units with an AS-i interface are available for integrating the 3RK3 modular safety
system on the AS-i bus.
• 3RK3 Advanced
• 3RK3 ASIsafe basic
• 3RK3 ASIsafe extended
Note
Name
References to "MSS 3RK3" or "3RK3 central units" in Chapter "Central unit with AS‑i interface"
always mean "MSS 3RK with AS‑i interface" and "3RK3 central units with AS‑i interface".
Exceptions are explicitly identi󹪝ed.
The di󹪜erences between these 3RK3 central units are listed in the table:
Feature 3RK3 ASIsafe ba‐
sic
3RK3 ASIsafe exten‐
ded
3RK3 Advanced
Safety-related, freely parameteriza‐
ble sensor inputs
2 4 8
Standard inputs 6 4 0
Safety-related two-channel relay
outputs
1 1 1
Safety-related two-channel semi‐
conductor outputs
1 1 1
Expansion modules 0 2 9
Max. number of simulated safety-
related AS-i slaves
8 10 12
DP interface Yes Yes Yes
Diagnostics module Yes Yes Yes
AS-i Power24V suitable Yes Yes Yes
Note
Examples
The examples in this chapter are all represented with a 3RK3 Advanced central unit. However,
they apply equally to all other central units with AS-i interface. However, you must note the
limitations on the number of expansion modules.
Operation
6.5 Connecting to the AS-i master via AS-Interface
SIRIUS 3RK3 Modular Safety System
202 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006