Model 458-2SL User Manual - Rev. D
4.0
RS-232 Control
Connections
The Model 458-2SL is completely controllable from an RS-232 source. The following section
explains the connections and the controls necessary for RS-232 operation. See Figure 2 for an
illustration of the pin connectors.
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Figure 2 DB-9 for RS-232 Control
CONNECTOR DB9
5
9
4
8
3
7
2
6
1
RXD
TXD
CTS/DSR
Pin 2 on the Model 458-2SL connects to the RECEIVED DATA pin in the Communications Port
Connector on the PC or controller.
Pin 3 on the Model 458-2SL connects to the TRANSMIT DATA pin in the Communications Port
Connector on the PC or controller.
Pin 5 on the Model 458-2SL connects to the GROUND pin in the Communications Port Connector
on the PC or controller.
Pins 6 and 8 are connected together and held at a positive voltage.
Common Communications Port Connectors, such as those found on PCs, are DB-9 and DB-25.
The standard pin assignments for these connectors are as follows: