Kramer Electronics VS-162AVRCA - Manual (Page 17)

Installing the Audio-Video Matrix Switcher
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6.3.3 Understanding the SLAVE Mode
The SLAVE mode is only used for the multi-channel video switcher
configuration, for example, when joining together two units. Two units could
be configured as a 16x16 s-Video (Y/C) with 4-channel stereo audio.
One unit is used as the Master, and the other unit is the Slave. The Slave
always follows the Master. In the example the first unit is the Master (with
DIP 6 set OFF disabling the Slave mode) and the second unit is the Slave
(with DIP 6 set ON enabling the Slave mode).
On the Slave unit, the MATRIX and STATUS Displays do not illuminate and
the STATUS Display shows this message:
Keyboard LOCKED
However, the STATUS Display on the Slave unit dynamically shows 1
Front panel control is via the Master unit, on which the front panel buttons are
unlocked and both the MATRIX and STATUS Displays illuminate.
all
changes made from the Master unit (which are implemented also on the Slave
unit).
6.4 Connecting a Control Interface
Connect a control interface (RS-232 or RS-485) unless operating a unit as a stand
alone unit without any control device (that is, with control from the front panel or
IR port, and not via a remote controller or a PC).
The control interface must be identical on each switcher in the series of 16x16
matrix switchers; either RS-232 or RS-485. One control interface suffices. Do
not use both RS-232 and RS-485 control interfaces in the same configuration.
For example, in an interconnected varied-format 16x16 switcher application 2
Choose the RS-232 control interface, for a range of up to about 25 meters
used for a point-to-point connection.
,
if the switcher that connects to the PC connects via the RS-232 control
interface, each switcher must interconnect via the RS-232 control interface
and not via the RS-485 control interface.
Choose the RS-485 control interface, to operate the switcher for a distance of
up to 1000 meters.
1 Albeit with an LCD Display that does not illuminate
2 See section 6.2