User Manual

June 17, 2002 UM0001-1B.00

1-4 User Manual for the CTS Tri-Reader

5. 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 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 transmit (232Tx) line and

should be connected to the host computer Rx input (pin 2 on a normal DB9).

6. If RS422 or RS485 is used, a one-to-one RJ45 cable to the CPU board can

be used. Otherwise, 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.

7. The Tri-Reader has an onboard tri-color LED indicator, so the external buzzer

and LED outputs are optional. The two external LED outputs are buffered

copies of the lines that drive the onboard LED and can drive 100 mA and

withstand 60V, so they can be used to drive relays if required.

8. The buzzer line is an unbuffered 5V CMOS level port pin of the onboard

Micro. Both buzzer and LED operation is controlled by commands from the

CPU board.

9. Resulting states for the external LED lines are listed in Table 1.

Table 1. External LED Line Resulting States

EXT_LED

EXT_LED1 LED Color

LO LO Off

LO HI Red

HI LO Green

HI HI Yellow