Extron Electronics Matrix 12800 Series User Guide - Manual (Page 67)

Matrix 12800 Switchers • Programming Guide 4-2
Programming Guide
PRELIMINAR
Y
RS-232/RS-422 Ports
The rear panel RS-232/RS-422 connectors (figure 4-1) of the matrix switcher BME 0
can be connected to the serial port output of a host device such as a computer
running the HyperTerminal utility or a control system. This connection makes
Simple Instruction Set (SIS) control of the switcher possible from the computer or
host via the RS-232/RS-422 link.
RS-232 Function Pin
1
2
3
4
5
6
7
8
9
—
TX
RX
—
Gnd
—
—
—
—
Not used
Transmit data
Receive data
Not used
Signal ground
Not used
Not used
Not used
Not used
RS-422 Function
TX+
TX-
RX+
RX-
Gnd
—
—
—
—
Transmit data (+)
Transmit data (-)
Receive data (+)
Receive data (-)
Signal ground
Not used
Not used
Not used
Not used
5 1
9 6
Female
Figure 4-1 — RS-232/RS-422 connector pin arrangement
N The Matrix 12800 Switchers are factory configured for RS-232 control. To
use the switcher under RS-422 control, you must change an internal DIP
switch. See “
Swapping the serial port protocol (RS-232/RS-422) ” in chapter 6,
“Upgrades and Maintenance”, for details.
The default communications rate is 9600 baud. Baud rates of 19200, 38400, and
115200 are also available, see “ Changing the serial port baud rate ”, in chapter 6,
“Upgrades and Maintenance”. The protocol is 8-bit, 1 stop bit, no parity, and no
flow control.