User Manual

September 25, 2003 4200-46001, Rev. B.00
1-4 User Manual for the Cubic Tri-Reader 2
1.6 Tri-Reader 2 Physical Interfaces
The following physical interfaces apply to the Tri-Reader 2:
1. The Tri-Reader 2 is powered from 5 to 28 Vdc. It can draw a maximum
current of 1.5A (at startup) and dissipates up to 2 Watts. This can be
supplied either via an expansion connector (J8) or it can be tapped from
the host communication cable, in which case it will come in on the RJ45
serial comms connector (see the pinouts below).
2. The Tri-Reader 2 comms can be set to be either RS232 or RS422/485
levels. RS232 mode is selected by software.
3. The Tri-Reader 2 automatic baud rate detection between 9,600 bps and
921,600 bps.
4. If RS232 is used, only two of the four comms lines on the RJ45 connector
are required. Pin 2 on the RJ45 connector is the Tri-Reader 2 receive line
(232Rx) and should be connected to the host computer Tx output (pin 3
on a normal DB9). Pin 6 on the RJ45 connector is the Tri-Reader 2
transmit (232Tx) line and should be connected to the host computer Rx
input (pin 2 on a normal DB9).
5. If RS422 or RS485 is used, 485RxL must be taken to the host transmit
low, 485RxH must be taken to the host transmit high, 485TxL must be
taken to the host receive low, and 485TxH must be taken to the host
receive high.
6. The Tri-Reader 2 has an onboard tri-color LED indicator.
7. The RJ45 communications connector is a shielded type that is mounted
in the J5 position. It mates to any standard RJ45 cable connector. Table 1
provides the J5 pinouts.