User guide

Serial

Communication

The VSC 500, 700, and 700D can be remotely controlled via a host computer or other device

(such as a control system) attached to the rear panel RS-232/422 connector. The control

device (host) can use either the Extron Simple Instruction Set (SIS™) commands or the

graphical control program for Windows.

The video scan converter uses a protocol with:

• 9600 baud

• 1 stop bit

• no parity

• no flow control

The rear panel RS-232/422 9-pin D connector has the following pin

assignments:

Pin RS-232 function Description

1 No connection

2 Tx Transmit data

3 Rx Receive data

4 Tx 2 Transmit data

5 Gnd Signal ground

6 No connection

7 No connection

8 Rx 2 Receive data

9 No connection

Pin RS-422 function Description

1 No connection

2 Tx- Transmit ground

3 Rx- Receive ground

4 No connection

5 Gnd Signal ground

6 No connection

7 Rx+ Receive data

8 Tx + Transmit data

9 No connection

DB9 Pin Locations

Female

VSC 500/700/700D User Guide • Serial Communication 21