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Remote Control
Remote Control Port (RS-232/RS-422/RS-485)
DIP switch settings
Use the DIP switch bank in the back of the SWP123 switcher to
configure the serial ports to operate as an RS-232 (factory
default) or RS-422/RS-485 interface. DIP switch settings
change according to the standard used. Configure the DIP
switch according to your requirements, based on the table
below.
SWP123 Presentation Switcher • Remote Control
5-2
The SWP123 Presentation Switcher RS-232/RS-422/RS-485 port
connector is used to connect to a host or external controlling device, such
as a computer or control system, which can generate the proper command
codes and recognize the switcher's responses.
Rx+
Rx-
Tx+
Tx-
Gnd
RS-232/422/485
5-pole captive screw connector/socket
The RS-232/RS-422/RS-485 connector is a 5-pole, captive screw
connector (see illustration above) with the following pin designations:
Switcher
Serial Port
RX+
RX-
RS-232
TX+
Connection
TX-
GND
RX+
RS-422/485
RX-
Full Duplex
TX+
TX-
Connection
GND
RX+
RS-485
RX-
Half Duplex
TX+
TX-
Connection
GND
The default protocol is 9600 baud, 8-bit, 1 stop bit, no parity, and no flow
control.
Commands and responses for programming the SWP123 Switcher from a
host system connected to the RS-232/RS-422/RS-485 port are listed on the
following pages.
Termination resistors should be turned on only when the switcher is
operating in RS-422/RS-485 mode, and then only for the first and last units
on a long serial line. The default switch settings are all OFF. In half-duplex
mode, turn on only one of the termination resistors, as they are connected
together by the cable.
Rx+
5
1
Rx-
Tx+
Tx-
Gnd
9
6
DB9 Pinout (Female)
To control equipment
Computer
DB-9 Serial Connector
3
TX
2
RX
5
GND
2
TX+
6
TX-
3
RX+
7
RX-
5
GND
1
GND
2
TX+
6
TX-
3
RX+
7
RX-
5
GND
1
GND
RS-232
RS-422/485
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