Siemens SIRIUS 3RK3 - Connecting the AS-I Bus

5.3.3.6 Connecting the AS-i bus
Requirements
The MSS 3RK3 can only be connected to the following central units on the AS-i bus:
• 3RK3 Advanced
• 3RK3 ASIsafe basic
• 3RK3 ASIsafe extended
When connecting the AS-i cables, pay attention to the general information in Chapter
"Connecting terminal blocks (Page 145)."
Note
Bus load of MSS 3RK3
The MSS 3RK3 is always a bus load from an A/B slave on the AS‑i bus. This bus load does not
depend on how many slaves are simulated by the 3RK3 central unit or whether only AS-i slaves
are monitored.
How to connect to the AS-i bus
Step Instructions Figure
1 Connect AS-Interface to the AS-i terminals ① / ② on the
3RK3 central unit.
The blue conductor of the AS-i cable is connected to the
terminal "ASi-" ① and the brown conductor to the ter‐
minal "ASi+" ②.
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Description of the hardware
5.3 Connecting / wiring
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 153