Installation guide

A. Pinouts
8820-A2-GN20-80 November 2004
A-7
DB25 Adapter Pinouts
The DB25 (RS-232 male) cable adapter provided with the MCP is used to convert
the 8-pin modular serial interface to a standard RS-232 DB25 interface, which can
then be connected to a terminal, computer, or any Data Termination Equipment
(DTE). Connection to a modem requires a null modem adapter. The following table
lists the pin assignments.
DB9 Adapter Pinouts
The female DB9 cable adapter provided with the SCP card and the MCP is used to
convert the 8-pin modular serial interface to a standard DB9 interface, which can
then be connected to a laptop computer. The following table lists the pin
assignments.
8-Pin Modular
Serial Interface
Pin Number Use
DB25
Interface Pin
Number
1
2
Pins 1 and 2 are
shorted together
–
3 Data Terminal Ready 20
4 Signal Ground 7
5 Receive Data 3
6 Transmit Data 2
7 Clear to Send 5
8 Request to Send 4
99-15388a
8-Pin Modular
Serial Interface
Pin Number Use
DB9
Interface Pin
Number
1
2
Pins 1 and 2 are
shorted together
–
3 Data Terminal Ready 4
4 Signal Ground 5
5 Receive Data 2
6 Transmit Data 3
7 Clear to Send 8
8 Request to Send 7
99-16049a