Connecting the VP-31KSi 3x1 UXGA/Audio STEP-IN Switcher
13
Figure 9: RS-485 DIP-switch Default Setting
Table 3: RS-485 DIP-switch Settings
DIP-switch Number
Function
1, 2, 3
Machine number (see
Table 4
)
Default—All off (up), machine number 1
4
RS-485 Bus Termination
Default—Off (up)
DIP-switches 1, 2 and 3 determine the RS-485 machine number of the
VP-31KSi
. When several
VP-31KSi
units are connected, the machine number
determines the unique identity of the
VP-31KSi
on the bus (see
Table 4
).
Note
:
•
When using a stand-alone
VP-31KSi
unit, set the machine number to 1
(factory default)
•
When connecting more than one
VP-31KSi
, set the first machine (connected
via RS-232) to be machine number 1. The other
VP-31KSi
units must each
be set to a unique machine number between 2 and 8
Table 4: Machine Number DIP-switch Settings
Machine Number
1
2
3
1 (Default)
OFF
OFF
OFF
2
OFF
OFF
ON
3
OFF
ON
OFF
4
OFF
ON
ON
5
ON
OFF
OFF
6
ON
OFF
ON
7
ON
ON
OFF
8
ON
ON
ON
DIP-switch 4 sets the RS-485 bus termination of the
VP-31KSi
. Only the first and
last physical units on the RS-485 bus must be terminated, all others must be
unterminated. Moving the DIP-switch up turns the termination off (default),
moving the switch down turns the termination on.
5.6.2 Connecting and Controlling Multiple VP-31KSi Devices
You can daisy-chain up to eight
VP-31KSi
devices with operation via RS-232
from a PC or serial controller (see
Figure 10
).
