Incorporation Of Omus Into Process Control; Galvanic Isolation & Short-Circuit Protection - wohner OMUS Bedienungsanleitung

OMUS® user manual
2.2 Incorporation of OMUS
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OMUS can be actuated with the help of a programmable logic controller (PLC). The precise
specification for the input signals of OMUS
as well as in 2.5 Switching processes in the hybrid switch. The defined limit values such as a
maximum switching frequency of 1Hz and minimum on and off duration of 100ms must be
strictly adhered to in order to guarantee proper operation.
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OMUS possesses numerous self-diagnostic and safety monitoring mechanisms. Warnings
and errors are routed to the analysis unit via the signal relays.
The incorporation and active processing of the warning or error messages into the
corresponding control of the system is necessary in order to achieve the maximum
system dependability.
If the limit values are exceeded, e.g. the minimum switch on time, OMUS
based self-diagnostic system, and will ignore unreliable control commands. The incorrect
actuation will not be issued by a signal.
2.3 Galvanic isolation & short-circuit protection
The device does not have an internal galvanic isolation. In the event of an error, OMUS
switches off as normal without being fully galvanically isolated. An external switching
element is required for galvanic isolation. The galvanic isolation can be realized on the part
of the feed.
Galvanic isolation on the part of the feed:
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into process control
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94 799 000 A
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is described in detail, in chapter 9 Technical data,
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has a software-
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Revision 8, March 2017
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