Kramer VS-402XL, User Manual

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Cascading Vertical Interval Video-Audio Matrix Switchers
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7.3 Cascading Individual Units in a Control Configuration
You can cascade up to eight individual
1
7.3.1 Control Configuration via RS-232 and RS-485
VS-402XL / VS-602XL units with
control from a PC or serial controller.
To cascade up to eight individual VS-402XL / VS-602XL units, via RS-232
and RS-485, do the following:
1. Connect the composite video sources and acceptors, as well as the appropriate
audio sources and acceptors, as section 6 describes.
2. Connect the RS-232 port on the first VS-402XL / VS-602XL unit to the PC
using the Null-modem adapter provided with the machine (recommended), as
section
6.1 describes.
3. Connect the RS-485 terminal block port on the first VS-402XL / VS-602XL unit
to the RS-485 port on the second VS-402XL / VS-602XL unit and so on,
connecting all the RS-485 ports.
4. Set the SETUP dipswitches, as section 6.2 describes. In particular:

Set the first VS-402XL / VS-602XL unit as MACHINE # 1 and the
following seven VS-402XL / VS-602XL units as MACHINE # 2 to
MACHINE # 8, according to Table 4

Set DIP 4 ON on the first and last VS-402XL / VS-602XL units
(terminating the RS-485 line at 120
Ω
). Set Dip 4 OFF on the other
VS-402XL / VS-602XL units

Set DIP 6 ON on all VS-402XL / VS-602XL units (enabling the Reply
option in accordance with Protocol 2000)

Set DIP 5 and Dip 8 OFF on all VS-402XL / VS-602XL units

Set DIP 7 OFF on all VS-402XL / VS-602XL units (if the PC connects
via the RS-232 port)
1 But not interconnected