Caution
To avoid damage to the MPRX, connect the MPRX to ground before powering up the reader or
connecting the antenna(s).
Connect the antenna(s) before applying power to the reader.
Interface Selection Switch
The MPRX incorporates a communications interface selection switch, which allows on-the-fly changes to
the communications mode. This switch allows selecting the reader’s receive communications interface. All
communications interfaces are configured for simultaneous transmit, but only the interface selected by the
switch is active for commands transmitted into the reader.
Connecting Communications
The MPRX communicates through RS–232, RS–422, or Ethernet protocols.
Required Materials
You need the following materials to connect the communications cable to the host device:
•
Host device
•
Any terminal emulation program operating on a PC
Connecting the MPRX to the Host Port
MPRX communications and customer interface signals are supplied from the MPRX to the host through
a multi-wire cable. The connector for this cable is located on the end of the MPRX (
).
Insert one end of the MPRX communications/power interface connector into the M23 Host connector
at the MPRX and the other end into the customer-supplied host device connector. Refer to
and
for pin assignments and numbers.
Connecting Sense Input and Sense Output Circuits
The MPRX has two sense input circuits and a tag lock output circuit available. SENSE 0 is used to enable
RF on antenna ports 0 and 1 if enabled, and SENSE 1 is used to enable RF on antenna ports 2 and 3. The
sense input circuits are used to notify the MPRX of train presence and are designed to be connected to a
free-of-voltage dry contact. The tag lock output circuit is a single-pole, double-throw relay that provides a
normally closed and normally open dry contact. The relay contact is rated at 42.2 VAC peak (30 Vrms) or
60 VDC at 1 A maximum.
CAUTION
If controlling an external gate or device requiring high current, an isolation transformer is
required.
MPRX User Guide
TransCore Proprietary
2–32
Содержание MPRX 10-7200-001
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