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SW2 DP • Installation 5
Wiring for RS-232 Control
The 5-pole, 3.5 mm captive screw Remote connector is used for RS-232 communication and
to enable auto-input switching between inputs connected to the switcher.
Use a female 9-pin D-to-bare wire RS-232 cable or a universal control cable to connect your
computer or control system to the Remote connector (see “Cables and Adapters” on
page 27 for ordering information).
1. Wire the unterminated end of the RS-232 cable to the provided 5-pole captive screw
plug as described below. Connect the transmit, receive, and ground wires of the cable
to the first three pins on the connector, starting at the left:
• Connect the transmit wire to pin 1, which plugs into the Tx (transmit) port.
• Connect the receive wire to pin 2, which plugs into the Rx (receive) port.
• Connect the ground wire to pin 3, which plugs into the G (ground) port.
2. Plug the 5-pole connector into the Remote receptacle on the rear panel.
Figure 3 shows how to wire this shared connector for RS-232.
RS-232 Auto
Computer or
Control System
RS-232 Port
SW2 DP Switcher
Rear Panel
Remote Port
NOTE: If you use cable that has a drain
wire, tie the drain wire to ground
at both ends.
TxRx
G
Ground (G)
Transmit (Tx)
Receive (Rx)
Transmit (Tx)
Receive (Rx)
9-pin HD
Connector
Figure 3. Remote Connector Pin Assignments for RS-232