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Section 7 – Technical Details
7.1 Modem Serial Connections
The table below shows the pin connections required for a 9-way RS232 connection to
the modem.
Pin Number
Signal
Abbreviation
1
2
RD (RXD)
3
SD (TXD)
4
DR (DTR)
5
SG (GND)
6
DR (DSR)
7
RS (RTS)
8
CS (CTS)
9
7.2 Recommended Cable Connections
7.2.1 A1SJ71C24-R2 Communications Module
(MODEM-R2-CAB)
9-way male to 9-way male D-Type connectors
Comms.
Modu le
3
2
5
7
8
6
1
4
Signal Name
N/C
No Connection
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request to Send
Clear to Send
N/C
No Connection
35
Signal Direction
Modem
N/A
N/A
Modem
3
2
5
7
8
6
1
4
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