Oldham MX 32, Руководство пользователя

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13
– Functionnal Safety
63
Chapter 13
│ Specific conditions of use and
Functional Safety
Reliability data
SIL 1 certification is pending and scheduled by July 2018.
Specific Conditions of Use
The safety function of the MX 32 is the processing of the signal of the
detectors linked to its input. As soon as a measurement reaches a
programmed threshold, an audio and visual alarm goes off. Simultaneously,
the possible corresponding alarm relay(s) is (are) activated, commanding
additional internal or external actions set forth by the user.
In case of system failure, the internal fault relay opens to indicate a fault
status (see Figure 8: Internal view (2 line version on top and Bridge version at
the bottom)Y).
The fault relay switches over one of the following events:
- Internal error
- Loss of power
- Detector fault
- Connection failure between a measuring line and a detector
The safety function is not assured at the powering up of the controller and
during the time of programmable stabilization from 30 to 500 seconds.
It is imperative to connect the fault relay and to process this information in any
installation where an SIL level is required.
Once per year minimum, it is suggested to voluntarily trigger a fault on one of
the measuring lines, by disconnecting a detector, for example, and checking
the proper switching of the fault relay.