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Signal Name
Pin Number
DCD
DSR
RXD
CTS
RI
RTS
TXD
DTR
GND
2500
Pin #
Function
3
Receive data
2
Transmit data
6
Data terminal ready
5
Signal ground
4
Data set ready
2500
Pin #
Function
3
Receive data
2
Transmit data
6
Data terminal ready
5
Signal ground
4
Data set ready
Interface
Table 3-1
RS232 Interface Connections
Inputs:
1
4
3
8
9
Outputs:
7
2
6
5
Connect
to
db9 to db9 Cable Configuration
Connect
to
db9 to db25 Cable Configuration
Figure 3-3
RS-232 Cable Configurations
Function
Data Carrier Detect
Data Set Ready
Receive Data
Clear to Send
Ring Indicator
Request to Send
Transmit Data
Data Terminal Ready
Signal Ground
Controller
Pin #
Function
3
Transmit data
2
Receive data
6
Data set ready
5
Signal ground
4
Data terminal ready
Controller
Pin #
Function
2
Transmit data
3
Receive data
6
Data set ready
7
Signal ground
20
Data terminal ready
Page 75 of 75
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