SECTION 1
COMMUNICATION INTERFACE MODULE
PM055 Rev 2 00/08/31
Thomson Technology
11
10.6.
RS-232 and RS-485422 Wiring
This section describes the cabling necessary to connect a host PC to a
CIM using RS-232 and to connect to an RS-485 or RS-422 network
10.6.1. Host PC Connection
The host PC connection to the CIM requires a null-modem adapter, as
both devices believe they are DTE.
10.6.1.1.
Host PC DB-25 To CIM DB-9
DTE
DB-25
DB-9
CIM
GND 1
n/c
GND
TXD 2
2
RXD
RXD 3
3
TXD
RTS 4
8
CTS
CTS 5
7
RTS
DSR, DCD
6,8
4
DTR
SG 7
5
SG
DTR 20
6,1
DSR,DCD
10.6.1.2.
Host PC DB-9 To CIM DB-9
DTE
DB-9
DB-9
CIM
TXD
3 2 RXD
RXD
2 3 TXD
RTS 47
8
CTS
CTS
8 7 RTS
DSR, DCD
1,6
4
DTR
SG
5 5 SG
DTR 4
6,1
DSR,DCD
