Extron Electronics MSG0808 - Manual (Page 32)

Remote Control
MSG Matrix Switchers • Remote Control 5-2
Remote Control Port (RS-232/RS-422/RS-485)
The MSG Matrix 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.
The RS-232/RS-422/RS-485 connector is a 5-pole, captive screw connector
(see illustration above) with the following pin designations:
The default serial protocol is 9600 baud, 8-bit, 1 stop bit, no parity, and no
flow control.
Commands and responses for programming the MSG Matrix Switcher from
a host system connected to the RS-232/RS-422/RS-485 port are listed on the
following pages.
Dip Switch Settings
Use the DIP switch bank in the back of the MSG switcher to configure the
serial ports to operate as an RS-232 (factory default-all switches up) or
RS-422/RS-485 (all switches down) interface. DIP switch settings change
according to the standard used. Configure the DIP switch according to
your requirements, based on the table below.
DB9 Pinout (Female)
To control equipment
5 1
9 6
Rx+
Rx-
Tx+
Tx-
Gnd Rx+
Rx-
Tx+
Tx-
Gnd
RS-232/422/485
5-pole captive screw connector/socket
RS-232
RS-422/RS-485
1 2 3
RX+
RX-
TX+
TX-
GND
2
3
5
RX
TX
GND
RX+ 2 TX+
RX- 6 TX-
TX- 7 RX-
TX+ 3 RX+
GND 5 GND
1 GND
1 GND
Switcher
Serial Port
Computer
DB-9 Serial Connector
RS-232
Connection
RS-422/485
Full Duplex
Connection
RS-485
Half Duplex
Connection
RX+ 2 TX+
RX- 6 TX-
TX+ 3 RX+
GND 5 GND
TX- 7 RX-
ON (1)(Down) OFF (0)(Up-Default)