SIS
Communication
and Control
The DVS 304 can be remotely controlled via a host computer or other device (such as a
control system) attached to the rear panel RS-232 connector or the LAN port.
The DVS 304 can be configured and controlled by the Extron Simple Instruction Set
(SIS
™
) of commands, or by using the Extron Signal Processing Products Control Program
(SPPCP), or via the devices internal HTML Web pages.
This section describes SIS communication and control. Topics that are covered include:
•
•
The scaler uses a protocol of 9600 baud, 1 stop bit, no parity, and no flow control and the
rear panel RS-232 9-pin, D connector has the following pin assignments:
Pin
RS-232 Function
Description
1
Input #1
Contact closure
2
Tx
Transmit data
3
Rx
Receive data
4
Input #2
Contact closure
5
Gnd
Signal ground
6
Input #3
Contact closure
7
Input #4
Contact closure
8
-
No connection
9
-
Reserved
NOTE:
If contact closure is not in use, pins 1, 4, 6, and 7 should have no connection.
Host to Scaler Communications
SIS commands consist of one or more characters per field. No special characters are
required to begin or end a command sequence. When the DVS 304 determines that a
command is valid, it executes the command and sends a response to the host device. All
responses from the scaler to the host end with a carriage return and a line feed
(CR/LF =
]
), signaling the end of the response character string (one or more characters).
DB9 Pin Locations
Female
5
1
9
6
DVS 304 Series • SIS Communication and Control
30
