Knoll Systems VC224PM Manuel d'utilisateur télécharger pdf (Page 3)

Cat wires from rooms with more than one VC201 are run from one VC201 to

the other then home run back to the controller.

It is very important to use a top quality RJ45 8/8

crimper tool. We strongly suggest using a cat 5

RJ45 electronic tester to verify the wire conductors.

Connection to Stereo Equipment: Remove the VC224pm orVC226pm green

four-position speaker connector labelled "INPUT". The stereo amplifier or

receiver outputs (left and right) are connected to this VC224pm or VC226pm

connector. Be very careful to observe the correct polarity. This controller

uses independent floating grounds so bridged amplifiers can be used safely.

VC224pm and VC226pm controllers are rated for

use with maximum 120 watt per channel amplifiers.

DO NOT use higher-powered amplifiers with this

product for safety reasons.

The amplifier or receiver must be rated for four ohm speaker use to work

properly with the VC224pm or VC226pm controller. Connect the controller

to the amp or receivers speaker A or speaker B terminals. Wire the VC224pm

or VC226pm connectors labelled “ROOM1", "ROOM2" etc. directly to the

correct room speakers, again strictly observing polarity.

Power Requirements: The VC224pm and VC226pm are shipped with a 12VDC

500mA (or more) power supply (supplies power to the keypads). If possible,

connect the 12vdc power supply to the switched outlet on the rear of the

amplifier or receiver. This wiring causes the VC224pm or VC226pm

controller to reset to its selectable “boot up” every time the receiver or

amplifier is turned on but when the power is off the IR section of the

VC201i will not work. If the IR is required to work all the time, then the

controller power supply must connected to an unswitched outlet.

Installer Selectable “BOOT UP”: The VC224pm and VC226pm allow the

installer to select how the volume control “boots up” in each room when the

controller first receives 12vdc power. For this feature to work, be sure to

plug the 12vdc power supply to the switched AC outlet on the rear of the

receiver or amplifier. Please note #6/12 and S/Mute labels are inverted

on zones 2, 4 and 6 on the version 1.3 board.

To always Start MUTEed make sure the shunt on the right side of the

controller room number labelled “S/MUTE” is in place. Remove this shunt and

this room starts with the music on.

To always start up in a quiet position #6 (of 17) sure the shunt on the right

side of the controller room number labelled “# 6/12” is in place. Remove this

shunt if this room is to start in the louder position #12.

To restore the boot up defaults, replace the appropriate room shunts.

Installation

Installing the digital volume control system should be relatively

easy. With a bit of planning, it will give trouble free service

for years.

Basic System Layout and Pre-Wiring: See “Typical Wiring Diagram” on

the centerfold page. The VC224pm and VC226pm make a noticeable “click”

sound when changing volumes. We suggest mounting it in a low voltage panel,

electrical room, closet, etc. We do not suggest connecting more than one

VC224pm or VC226pm to a single amplifier or receiver, even if it is a high

power model because a variety of power sharing problems can occur.

One or two VC201 keypads can work on a single room or zone but only one

VC201i can be connected to a single VC224pm or VC226pm room or zone.

The VC200 keypad does not work with this system.

Use the standard T568A wiring practices to run a cat 5 or cat 3 wire from

the keypad or controller to the VC224pm or Vc226pm. If more than one

keypad controls a single VC224pm or Vc226pm room, daisy chain the cat

wire from keypad to keypad. If the VC226pmi is not located next to the

stereo, run a single eight-conductor cat 3 or cat 5 wire run and four

speaker wire conductors from the stereo to the controller for the power

supply, the infrared system, future upgrades such as paging override and of

course the steeo speaker sound.

From each speaker run a home run fire rated two-conductor speaker wire

to the VC224pm or VC226pm. To save time and money, most installers run a

four-conductor speaker wire from the VC224pm or VC226pm to the closest

appropriate speaker and then run a short two-conductor speaker wire to

the other speaker. If there is more than one pair of speakers connected to

a single VC224pm or VC226pm zone, the speakers can be wired in series or

parallel whichever makes the impedance closest to 4 or 8 ohms. Do not

attempt to make the final combined speaker impedance less than 4 ohms.

Connecting VC201/VC201i keypads to VC224pm and VC226pm controllers:

Use a single cat5 wire using all eight conductors (usually run inside a wall).

Always use standard T568A Cat 5 wiring practices (shown below). Use the

correct wire pairs. Polarity is VERY important! The stereo signal is not

routed to the keypad, just the digital control signals. Signals from an

infrared receiver (if used) are routed down the same Cat 5 wire. If more

than one keypad (VC201, not VC201i) is to be connected to a VC224pm or

VC226pm controller, the wires to the keypads are paralleled. continued..

brown 8

white/brown 7

orange 6

white/blue 5

blue 4

white/orange 3

green 2

white/green 1

1 2 3 4

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Knoll Systems VC224PM Manuel d'utilisateur Page 3

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