KRAMER: SIMPLE CREATIVE TECHNOLOGY
Connecting the VP-81K 8x1 UXGA / Audio Switcher
20
6.6 Cascading Machines
You can cascade up to eight
VP-81K
units with control from a PC or serial
controller (see Figure 14).
To cascade up to eight individual
VP-81K
units via RS-485, do the following:
1. Connect the computer graphics sources and acceptors, as section 6 describes.
2. Connect the RS-232 port
1
to the first
VP-81K
unit to the PC using the
Null-modem adapter provided with the machine (recommended), as section
6.2 describes.
3. Connect the RS-485 terminal block port on the first unit to the RS-485 port on
the second
VP-81K
unit and so on, connecting all the RS-485 ports.
4. Set the dipswitches, as section 6.2 describes:
Set the first
VP-81K
unit as Machine # 1 and the following seven
VP-81K
units as Machine # 2 to Machine # 8, according to Table 4
Set DIP 4 ON on the first and last
VP-81K
units (terminating the
RS-485 line at 120 ). Set DIP 4 OFF on the other
VP-81K
units
Machine # 1 (Master)
Machine # 2
Machine # 8
Up to 8
Units
Figure 14: Control
Configuration via RS-232 and RS-485
1 Alternatively, the RS-485 port could be used for PC control (instead of RS-232)
