1.3 Validity range
This manual is valid for the components of the MSS 3RK3 stated below with article numbers:
Component Article number
3RK3 Basic (central unit) 3RK3111-xAA10
3RK3 Advanced (central unit) 3RK3131-xAC10
3RK3 ASIsafe basic (central unit) 3RK3121-xAC00
3RK3 ASIsafe extended (central unit) 3RK3122-xAC00
4/8F‑DI (expansion module) 3RK3211-xAA10
2/4F‑DI 1/2F‑RO (expansion module) 3RK3221-xAA10
2/4F‑DI 2F‑DO (expansion module) 3RK3231-xAA10
4F‑DO (expansion module) 3RK3242-xAA10
4/8F‑RO (expansion module) 3RK3251-xAA10
8DI (expansion module) 3RK3321-xAA10
8DO (expansion module) 3RK3311-xAA10
DP interface (interface module) 3RK3511-xBA10
Diagnostics display 3RK3611-3AA00
PROFINET interface (interface module)
3SK2511-xFA10
x = 1: Version with screw-type terminals:
x = 2: Ver
sion with spring-loaded terminals:
SIEMENS reserves the right of including a Product Information for each new component, and for
each component of a later version.
About this manual
1.3 Validity range
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 13
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