TransCore MPRX 10-7200-001, Руководство пользователя

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Sense Input Circuits
The MPRX supports two sense inputs – SENSE 0 and SENSE 1 – which require two sense input lines
(SENSE x and GND) for each loop sense or a total of four sense input connections. SENSE 0 is used to
control RF power for the track that has antennas connected to RF ports 0 and 1. The sense inputs are
wired through the reader M23 sense connector. The MPRX expects the SENSE 0 circuit to close when a
rail car is present (on the track with antennas connected to MPRX ports 0 and 1).
SENSE 1 must be closed when a rail car is present on the track connected to MPRX antenna ports 2 and 3.
The reader RF switches on to the appropriate RF ports immediately upon detecting SENSE x.
Sense Output Circuit
The sense output is dedicated for testing and reader setup. It is defined as the TAG_LOCK signal, which
indicates a valid tag is in the read field.
This sense output is a dry contact that provides a normally open and normally closed sense output. The
relay contacts are rated at 42.2 VAC peak (30 Vrms) or 60 VDC at 1 A maximum. If controlling an external
gate or device requiring high current, an isolation transformer is required.
The two models of the MPRX that are designed for wayside DC power input have a solid-state relay
instead of a dry contact mechanical relay. It is a 5+ VDC output that can be used as a lock signal or can be
used to drive an alarm or relay coil.
Antenna Mux Channel Identification
With the four channel model MPRX in MPRX mode, it is possible to identify the tags read on the 4-channel
mux individually through the output I/O.
Antenna mux channel identification is included in the tag data response if the #311 Append Auxiliary
Command is issued.
If AAR mode is enabled on the wayside DC power input models, the outputs OUT 0 and OUT 1 will show
the antenna mux channel identification as a binary logic level indication, as shown in Table 9 .
Table 9 Antenna Mux Channel Identification
ANTENNA CHANNEL OUT 0 OUT 1
0 0 0
1 0 +5V
2 +5V 0
3 +5V +5V
Interface through Ethernet Port
To interface through the Ethernet port of the MPRX, connect via the M12 Ethernet port (Use an M12 to RJ45
adapter if required). A static IP address will need to be assigned to the local host if directly connected, or
the reader may be attached to the network.
Chapter 2 Test Procedures
TransCore Proprietary 2–33