Teledyne Oldham MX 16, User Manual

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MX 16
ANALOG AND DIGITAL CONTROLLER
USER GUIDE
NP16EN
Revision: A.0
51
12 Specific conditions of use and
Functional Safety
Specific Conditions of Use
The safety function of the
MX 16 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 7:
Internal view 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 security function is not ensured for 30 seconds after the initialization phase of the installation
(power on, reset, restart after configuration change) then during the programmable stabilization
time 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.
Specific instructions for the prevention of explosions
•
It is essential to refer to the instructions of use and commissioning of the gas detectors
that are connected to the controller.
• MX 16 controller is digitally compatible with OLCT 10N, OLCT 80, OLCT 710, iTrans2, 700
and Meridian gas detectors.
• In the event the user connects a non- TELEDYNE OLDHAM SIMTRONICS brand
detector to the MX 16 controller, the user must ensure that the detector is compatible
with the input characteristics of the controller, so that the information delivered by the
detector will be properly interpreted (see transfer curve on the following page). In
addition, the controller must provide sufficient supply voltage, taking into account
voltage drops in the cable.