NI 9870 Operating Instructions
6
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Wiring the NI 9870
The NI 9870 has four RJ-50 receptacles that provide connections
for four RS232 devices.
Table 1.
RS232 Port Pinout
RJ-50 Pin
Signal Name
*
1
No Connect
2
RI
3
CTS
4
RTS
5
DSR
6
GND
7
DTR
8
TXD
9
RXD
10
DCD
*
These signals are shared by all four RJ-50 connectors on the NI 9870.
DCD
NC
RI
CTS
RTS
DSR
COM
DTR
TXD
RXD
10
1
RJ50 Jack
2
3
4
5
6
7
8
9
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