Biamp IWA250 VCA PACKAGES User Manual

®

ACCESSORY

IWA250 VCA Packages

Remote Control Options

C +10V

VCA
card

C +10V

VCA
card

C +10V

VCA
card

C +10V

VCA
card

VCA-1

A single VCA Card for remote level control of an individual input or output. The VCA Card
installs onto the IWA250 circuit board, and requires an external potentiometer to control.

C +10V

VCA-4

VCA
card

C +10V

VCA
card

A package of four VCA Cards for remote level control of various inputs and/or
outputs. The VCA Cards install onto the IWA250 circuit board, and require
external potentiometers to control. A single potentiometer may be wired to
multiple VCA Cards for combined control of a group of signals.

RCP-1

A package including a single VCA Card and an RP-L1 remote panel.
The VCA Card installs onto the IWA250 circuit board. The RP-L1 remote
panel provides a 25k ohm linear taper potentiometer mounted on a grey
'decorator' style cover plate, with a single-gang 'cut-in' style PVC

RP-L1

electrical back-box and pre-wired pigtail.

C +10V

RCP-2

VCA
card

C +10V

VCA
card

RP-L2

Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. [phone] www.biamp.com

A package including two VCA Cards and an RP-L2 remote panel. The
VCA Cards install onto the IWA250 circuit board. The RP-L2 remote
panel provides two 25k ohm linear taper potentiometers mounted on a
grey 'decorator' style cover plate, with a single-gang 'cut-in' style PVC
electrical back-box and pre-wired pigtails.

®

C +10V

VCA
card

CH 1

+12V

+10V

GND

-12V

OUT

IN

mixer circuit board channel

IWA250 VCA Card Installation

To install VCA Cards, first remove the jumper wires (between OUT and IN) on the
respective channels/outputs of the mixer circuit board. Then install the two plastic
support/guides (provided with each VCA Card) into the holes provided on the
respective channels/outputs of the mixer circuit board (support/guides must be
properly oriented to accept VCA Card). Once the support/guides are in place, slide
the VCA Cards into the support/guides, making sure all pins on the VCA card slide
fully into the corresponding holes in the mixer circuit board.

Once the VCA Cards have been installed, remote controls (such as RP-L1 & RP-L2)
may be wired up to 2000 feet away, using 2-conductor shielded cable. Controls may
be any 5k~50k ohm linear taper potentiometer and/or switch to provide adjustment
and/or muting of the level. Potentiometers are wired with high-side to "+10V", low­side to "
"C" terminal on multiple VCA Cards, allowing control of a group of signals from a
single potentiometer. Switches simply connect (or disconnect) "+10V" to "C", and
do not require a ground ('
may be used, with the switch in line with either the "C" or "+10V" connection.
NOTE: When a VCA Card is installed, but no control is connected, signal will not
pass. To avoid this circumstance, a jumper wire may be temporarily connected
between "+10V" and "C". Additionally, if VCA Cards are removed, jumper wires
must be re-installed between OUT and IN on the respective channels/outputs of the
mixer circuit board, before signal can pass.

", and wiper to "C". The wiper of one potentiometer may be wired to the

') connection. A combination of potentiometer and switch

flange

Single-Gang Cut-In PVC

Electrical Back-Box for

RP-L1 & RP-L2

w

GND C +10V

knock-outs

flange

RP-L1 & RP-L2 Block Diagram

25kΩ

cwccw

linear

high (cw)

wiper

low (ccw)

Mounting Surface may be from 1/8" to 1" thick.

(3.175mm to 25.4mm)

Mounting Cavity must be exactly 3.6" high,

2.25" wide, and at least 2.75" deep.

(91.44mm H x 57.15mm W x 69.85mm D)

white

red

green

Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. [phone] www.biamp.com

18Dec06