Description of the hardware
5.3 Connecting/wiring
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02
71
QA, QB Contactors
Qx.1, Qx.2 Safety-related relay outputs
Note
When inductive loads are controlled via a relay output, the load must be equipped with
inductive interference protection.
Solid-state outputs
Internally, safety-related solid-state outputs always have a two-channel structure. As a result,
each of these outputs can be used for applications up to PL e or SIL 3.
Connection methods of the safety-related solid-state outputs
2 x single-channel actuator shutdown 2 x two-channel actuator shutdown
44
4%4$
0
/
4$
0
4%
0
4&4$
0
4% 4'
44
4$
4%
0
4&
4'
0
/
QA ... QD Contactors
Q1, Q2 Safety-related solid-state outputs
See also
Expansion module 2/4F-DI 2F-DO (Page 49)
3RK3 Basic central unit (Page 42)
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