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Connecting the RGBH / Balanced Audio Matrix Switcher
15
5.3 Controlling via RS-485
You can control a
VP-88ETH
unit via an RS-485 controller
1
, for example, a
PC (equipped with an RS-485 interface) or a Master Programmable Remote
Control system, such as the Kramer
RC-3000
2
.
To connect an
RC-3000
to a single
VP-88ETH
unit (see Figure 11):
1. Connect the RS-485 terminal block port on the
RC-3000
to the RS-485
port on the
VP-88ETH
unit, as follows:
Connect the “A” (+) PIN on the RS-485 rear panel port of the
RC-3000
to the “A” (+) PIN on the RS-485 rear panel port of the
VP-88ETH
unit
Connect the “B” (-) PIN on the RS-485 rear panel port of the
RC-3000
to the “B” (-) PIN on the RS-485 rear panel port of the
VP-88ETH
unit
If shielded twisted pair cable is used, the shield may be connected to
the “G” (Ground) PIN on one of the units (for example, on the
RC-3000
)
2. Set the SELF ADDRESS # dipswitches on the
VP-88ETH
unit to a
SELF ADDRESS # between 2 and 8, according to section 5.5.1. Do not
set as SELF ADDRESS # 1 (the Master). Terminate the RS-485 line on
both the
VP-88ETH
unit (set DIP 4 to ON) and on the
RC-3000
3
.
KEYBOARD EXTENSION
REMOTE CONTACT
RS-485
RS-232 IN
RS-232 OUT
12 VDC
1 2
1 2 3 4 5 6 7 8 G
4
6
8
10
3
5
7
9
11 12
14
16
OU
T
13
15
IN
RS-485 PINOUT
G
B
A
_
+
Figure 11: Controlling via RS-485 (for example, using an RC-3000)
1 RS-485 can be used for control even for distances exceeding 1km
2
Previously known as the VS-3000
3 Refer to the RC-3000 user manual for details of how to terminate the RS-485 line