Cloud LM-2 Series User's Guide download pdf (Page 19)

Z4-8MK3 Installation and User Guide 19

RL-1 Series and RSL-6 Series remote control plates – general considerations

Cloud RL-1 Series and RSL-6 Series remote control plates are available in three form factors, two t single-gang UK or American

electrical back boxes respectively; the third is a 50 x 50 mm “Media” module, suitable for “Euro-module” mounting frames

available in most European countries. Back boxes of either the recessed type or surface-mounting type may be used, providing

they are at least 25 mm deep.

The plates should be connected to the REMOTE SOURCE+LEVEL port of the relevant zone using single- or twin-core screened

cable as described at page 14. The plate terminations are conventional screw terminals and the REMOTE SOURCE+LEVEL

port on the mixer is a 3-pin 5 mm-pitch screw terminal connector.

The remote control plates are passive and thus do not draw any current from the mixer.

Control of music source and level via external DC

It may be necessary in some installations to adjust the music level and select music source in one or more zones from an

external control system (e.g., Crestron, AMX, etc.). If the REMOTE SOURCE+LEVEL ports are not required for RL-1/RSL-6

Series remote control plates, they may be used to receive DC voltages from the external system to effect these adjustments.

Both music source selection and level can be controlled over their full ranges with a DC voltage of 0 to +10 V. The pinout of the

REMOTE SOURCE+LEVEL port is as follows:

PIN USE

1 0 V ref.

2 Music level control (0 to +10 V)

3 Music source selection (0 to +10 V)

REMOTE

SOURCE+LEVEL

PORT

+15 V

0 V

MUSIC VCA

MUSIC SOURCE

SELECT

4k7

15k

CONTROL

SYSTEM

0 V REF

LEVEL CONTROL

SOURCE CONTROL

Z4MK3/Z8MK3

NOTE: If the control voltage source is not isolated from the power earth, there is a small risk of creating a ‘ground loop’ by

linking the mixer technical ground (0 V) to the ground (0 V) of the equipment supplying the control voltages. To minimise this

risk, we suggest that all pieces of equipment be in close proximity, and supplied from the same power outlet.

Music level

Music level in a zone may be varied over its full range by applying a DC voltage of between 0 and +10 V to pin 2, the 0 V reference

being connected to Pin 1. 0 V on pin 2 corresponds to maximum level and +10 V will produce 60 dB of attenuation. The rate of

attenuation is approximately 165 mV/dB.

Note that there is an internal 4k7 “pull-up” resistor between pin 2 and the internal +15 V rail. If pin 2 is left “oating”, this pull-

up will result in full attenuation. The output impedance of the control voltage source should be low enough to overcome the

effect of this resistor.

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Cloud LM-2 Series User's Guide Page 19

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