Allenheath MIXWIZARD3 20S User Manual download pdf (Page 29)

20S User Guide 29

AUX master balance option The 6 aux

outputs are impedance balanced as standard

operating at nominal -2dBu and with +21dBu

maximum drive. They provide similar interference

rejection to electronically balanced outputs when

connected to balanced equipment inputs. An

electronically balanced option is available if you

require nominal +4dBu and higher output drive up to

+26dBu over very long cable runs. However, it is not

usually necessary to fit this option as the impedance

balanced drive satisfies most applications. Check

that you really need the option before fitting it.

There are two balanced driver ICs which may be

used. Either is suitable. These are available from

Allen & Heath or most electronic component

suppliers. The Allen & Heath part number is shown

below:

SSM2142P A&H Part AE0302

DRV134 A&H Part AE5725

For each aux master, snip the legs of the two zero

ohm resistor links as shown. This removes them

from the circuit. Now simply plug the option IC into

the socket. Observe the correct IC pin1 orientation

and make sure its legs are correctly aligned with the

socket. Test the output once the work is complete.

You should measure the same level but opposite

polarity signal between + (hot) and ground, and –

(cold) and ground.

Sys-Link II output option A blank plate is

fitted here as standard. This may be replaced with

an optional card which provides a 37way D

connector for linking the outputs to other Allen &

Heath consoles already fitted with Sys-Link II. The

20S can become input channel expanders for

other consoles.

IMPORTANT: The option does not include the Sys-

Link II input. Therefore the WZ

20S cannot be used

as the master in a linked system, nor can two of

these models be linked together. You need to

connect these to a console that does include the

Sys-Link II input connection, for example the

14:4:2 or ML3000 with the option already fitted.

Also note that you need an adapter cable if you are

connecting Sys-Link II (Version 2) to the older Sys-

Link I (Version 1) standard.

A 37way shielded multi-core cable carries the

MixWizard balanced mix signals and PFL system to

the master console.

For full details please refer to the Sys-Link option

Applications Note AP5736 and Fitting Instructions

AP5735.

AUX MASTER - BALANCED OUTPUT OPTION

U12 U11 U10 U9 U8 U7

AUX6 AUX5 AUX4 AUX3 AUX2 AUX1

CUT OUT 2x 0 OHM RESISTOR LINKS

PLUG IN SSM2142 or DRV134 IC

SLAVE CONSOLE

SYS-LINK II OUTPUT

WZ320S

SYS-LINK II INPUT

WZ314:4:2 OR OTHER A&H CONSOLE

SYS-LINK II OUTPUT

MASTER CONSOLE

37WAY CABLE

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Allenheath MIXWIZARD3 20S User Manual Page 29

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