Connector Pin-outs
E-17
RS-232
The RS-232 connector is a standard DB-9 plug. The pinout of this connector is such
that it does not need a null modem cable to connect to a PC serial port.
Table E-10 shows the pinout of the DB-25 connector. Signal I/O is with respect to the
reader logic card.
26 Reserved N/A N/A
27 Reserved N/A N/A
28 Reserved N/A N/A
29 BHW_IP_RXD Output Buffered RF module receive
30 BHW_IP_TXD Output Buffered RF module transmit
31 VCC Output +5 VDC power
32 VCC Output +5 VDC power
33 GND Output Ground
34 GND Output Ground
Table E-10 RS-232 Connector
Pin Name Type Description
1 RSD N/A Received line signal detect
2 TXD Output Transmit data
3 RXD Input Receive data
4 DTR N/A Data terminal ready
5 GND Input/
output
Ground
6 DSR N/A Data set ready
7 CTS Input Clear to send
8 RTS Output Request to send
9 RI N/A Ring indicator
Table E-9 Hardware Diagnostics Port Connector (continued)
Pin Name Type Description