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MX4428 MXP Engineering /Technical Manual Document: LT0273
MXP Technical Description
Page 7-2 24 March 2006 Issue 1.5
7.1 GENERAL
The MXP has two major functions:
(i) To provide an interface to an MX4428 responder (communications/power) loop, via
which data gathered by the MXP may be transferred to the MX4428 Master for
display, annunciation, and processing as appropriate.
(ii) To provide an interface to the Analogue Loop. Data retrieved from the devices
connected to the Analogue Loop is processed to determine the ALARM/NORMAL/
FAULT status of each device, and this data is passed on to the MX4428 Master via
the MX4428 Loop Interface. The Analogue Loop interface also allows outputs to be
sent to those devices that support them, to initiate device tests, activate relays, etc.
The MXP is implemented as one printed circuit board (1901-213).