THOMSON REMOTE COMMUNICATION - V3.0 User Manual page 52

SECTION 2
An RS-232 to RS-422 converter is required to convert the signal from the computer or modem.
The required wiring from the RS-422 side of the convert to the RJ-45 connection on the
controller is as shown:
RS-232
To modem or
computer
The RS-232 NULL connection between the modem and the converter must pass all handshake
signals, as shown in the following diagram:
Signal/Pin
DB-9
TD 3
RD 2
RTS 7
CTS 8
DSR 6
CD 1
DTR 4
GND 5
The modem must store configuration in a non-volatile storage medium (such as FLASH). The
modem must be configured for the following features:
•
auto-answer,
•
connect at 4800 bps only (no fallback),
•
echo disabled,
•
no error correction,
•
no compression.
PM055 Rev 2 00/08/31
RS-422
TDB(+)
TDA(-)
RDA(-)
RDB(+)
GND
Converter
unused
Pin/Signal
3 TD
2 RD
7 RTS
8 CTS
6 DSR
1 CD
4 DTR
5 GND
46
THS 2000 SOFTWARE PROGRAM
RJ-45
1
2
3 To Controller
4
5
6
7
8
Signal/Pin
DB-25
TD 2
RD 3
RTS 4
CTS 5
DSR 6
CD 8
DTR 20
GND 7
Pin/Signal
2 TD
3 RD
4 RTS
5 CTS
6 DSR
8 CD
20 DTR
7 GND
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