160 007-4857-002

A: Technical Specifications and Pinouts

Serial Ports

The IRU modules have 9-pin serial interface connectors. These ports are for console interface and

are capable of transferring data at rates as high as 230 kbps. Other features of the ports include the

following:

• Programmable data, parity, and stop bits

• Programmable baud rate and modem control

FigureA -2 shows a serial port example.

Figure A-2 Serial Port Connector

Pin 7
Request to
Send (RTS)
Pin 3
Transmit
Data (TXD)
Pin 2
Receive Data
(RXD) Pin 4
Data Terminal
Ready (DTR)
(not used)
Pin 5
Ground
Pin 9
Ringing Indicator (R
I)
(not used)
Pin 8
Clear to Send
(CTS)
Pin 6
Data Set
Ready (DSR)
(not used)
P
in 1
D
ata Carrier
D
etect (DCD)
(
not used)