Extron electronics DVS 304 Series User Manual page 15

Remote (RS-232/contact closure) port
L
provides for two-way RS-232 communication (see
on page 5). See the SIS Communication and Control
starting on page 30, for information on how to install and use the
control software and SIS commands. The default protocol is
9600 baud, 1 stop bit, no parity, and no flow control. The rear panel
RS-232 9-pin D female connector has the pin assignments according
to the side image:
Pin RS-232 Function
1
2
3
4
5
6
7
8
9
Figure 7. RS-232 Pin-out Table
The Remote connector also provides a way to select an input using a remote contact
closure device. Contact closure control uses pins on the RS-232 connector that are
not used by the RS-232 interface (see figure 7).
To select a different input number using a contact closure device, short the pin for the
desired input number to logic ground (pin 5).
NOTE: If contact closure is not in use, pins 1, 4, 6, and 7 should have no
connection.
— This 9-pin connector
figure 1
Description
Input 1 Contact closure
Tx Transmit data
Rx Receive data
Input 2 Contact closure
Ground Signal ground
Input 3 Contact closure
Input 4 Contact closure
- No connection
- Reserved
RS-232
5
chapter,
9
DVS 304 Series • Cabling
1
6
8