TransCore 05716 Manuel D’Utilisation
Multiprotocol Rail Reader System Guide
4-10
power. As shown in
, the sense inputs are wired through the reader DB15
connector. The MPRR expects the sense input0 circuit to close when a railcar is
present (on the track with antennas connected to ports 0 and 1). Sense1 must be closed
when a railcar is present on the track connected to antenna ports 2 and 3. The mini-
mum presence true period is fixed at 0 ms, which indicates that no delay occurs in
closing the circuit when a railcar is present.
present (on the track with antennas connected to ports 0 and 1). Sense1 must be closed
when a railcar is present on the track connected to antenna ports 2 and 3. The mini-
mum presence true period is fixed at 0 ms, which indicates that no delay occurs in
closing the circuit when a railcar is present.
Sense Output Circuit
The
sense output is dedicated for testing and set up of the reader. 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 42.2V AC peak (30 V
sense output. The relay contacts are rated at 42.2V AC peak (30 V
rms
) or 60V DC at
1 A maximum. If controlling an external gate or device requiring high current, an iso-
lation transformer is required.
lation transformer is required.
Marking the Read Zone
Caution
Be sure to follow all applicable rail safety regulations when marking the read zone.
The area where the MPRR reads tags at the current RF range is called the read zone.
The antenna pattern, or read zone, of the MPRR would look roughly like a pear-
shaped balloon if you were able to see it. When installing the MPRR, you should first
mark the unit’s read zone using the RF range set at the factory-default maximum. You
can later adjust the read zone using the techniques discussed in
The antenna pattern, or read zone, of the MPRR would look roughly like a pear-
shaped balloon if you were able to see it. When installing the MPRR, you should first
mark the unit’s read zone using the RF range set at the factory-default maximum. You
can later adjust the read zone using the techniques discussed in
.
If two MPRRs are installed near each other, TransCore recommends that you fine-tune
each reader for the ideal read zone before connecting it permanently to sense input/
sense output and communications cables. A minimum of 2 MHz frequency separation
and 40 feet (12.2 m) of antenna separation between the two adjacent readers is
required for correct operation.
each reader for the ideal read zone before connecting it permanently to sense input/
sense output and communications cables. A minimum of 2 MHz frequency separation
and 40 feet (12.2 m) of antenna separation between the two adjacent readers is
required for correct operation.
Required Materials
You need the following materials to mark the read zone:
•
Test tags, supplied by the TransCore dealer or distributor
To mark the read zone
1.
Confirm that you have correctly connected the power supply/communications
cable as described in this chapter.
cable as described in this chapter.
2.
Start the terminal emulation application Microsoft HyperTerminal by selecting
Programs>Accessories>Communications>HyperTerminal and press
ENTER.
Programs>Accessories>Communications>HyperTerminal and press
ENTER.