Extron Electronics FOX 500 DVI Tx User Guide - Manual (Page 26)

FOX 500 Tx/Rx • Remote Control
Remote Control
FOX 500 Tx/Rx • Remote Control 4-2 4-3
The transmitter and receiver each has two serial ports that can
be connected to a host device such as a computer running the
HyperTerminal utility, an RS-232 capable PDA, or a control
system. These ports make serial control of the transmitter and
receiver possible. The serial ports are:
• The rear panel Remote RS-232 port on 3-pin captive screw
connectors
• The front panel Configuration (RS-232) port, a 2.5 mm
mini stereo jack
The protocol for both ports on both units is as follows:
• 9600 baud
• no parity • 8 data bits
• 1 stop bit • no flow control
N For each unit, the rear panel Remote RS-232 port is
active only if the front panel Configuration port is not
active. If an active front panel configuration connection
is made, the rear panel Remote RS-232 port becomes
inactive.
N Only one fiber optic cable, Optical 1, is required for
video, audio, and serial command transmission. But,
if you connect only one fiber optic cable, you will not
receive RS-232 reports from the controlled device, and
there will be reduced RS-232 command and Windows
control program functionality on the Rx unit. To
receive responses from the controlled device and for full
functionality, you will need to install both fiber optic
cables.
Rear Panel Remote RS-232 Ports
Function Pin
TX
RX
Gnd
Transmit data
Receive data
Signal ground
Controlling
Device
Ground ( )
Receive (Rx)
Transmit (Tx) Ground ( )
Receive (Rx)
Transmit (Tx)
Bidirectional
REMOTE
RS-232 ALARM
Tx Rx 1 2
Do not tin the wires!
Figure 4-1 — Remote connector pin assignments
Front Panel Configuration Port
N The front panel configuration ports parallel the
rear panel Remote RS-232 ports. If a front panel
configuration connection is made on either unit, that
unit's rear panel Remote RS-232 port becomes inactive.
The optional Extron 9-pin D to 2.5 mm mini jack TRS RS-232
cable, part #70-335-01 (figure 4-2) can be used for connection to
the Configuration port.
6 feet
(1.8 m)
Part #70-335-01
5
1
9
6
Sleeve (Gnd)
Ring
Tip
9-pin D Connection TRS Plug
Pin 2 Computer's RX line Tip
Pin 3 Computer's TX line Ring
Pin 5 Computer's signal ground Sleeve
Figure 4-2 — Optional 9-pin TRS RS-232 cable
Simple Instruction Set Control
Host-to-interface communications
SIS commands consist of one or more characters per field. No
special characters are required to begin or end a command
character sequence. When a command is valid, the unit executes
the command and sends a response to the host device. All
responses from the unit to the host end with a carriage return
and a line feed (CR/LF = ]), which signals the end of the
response character string. A string is one or more characters.
Symbol definitions
Symbols (variables), defined on the next page, are used
throughout the "Unit-initiated messages" section and the
command/response table on page 4-8. The symbols represent
variables in the unit-initiated messages and the command/
response table fields.