WZ3  SYS-LINK Applications Note  AP5736                                                        1 
 
SYS-LINK explained 
SYS-LINK (system link) is the Allen & Heath connection  standard for linking two consoles together to 
expand the number of input channels feeding the mixes.  One becomes the ‘slave’ to the other ‘master’ 
console.  All the slave console mix busses including main LR, groups and auxes connect directly to the 
master  console  mix  busses  without  using  up  valuable  input  channels.    The  PFL/AFL  system  is  also 
linked so that all channels can be monitored using the master console headphones and meters.  The 
slave  console  master  section  is  not  used  as  its  signals  are  taken  before  the  mix  inserts  and  output 
faders.    Both  consoles  must  have  the  SYS-LINK  option  fitted.    A  single  multiway  cable  is  all  that  is 
required to link the WZ3 to another Allen & Heath console fitted with SYS-LINK. 
 
SYS-LINK versions 1 and 2 
The MixWizard WZ3 uses the more recent SYS-LINK Version 2 standard.  This benefits from balanced 
interconnections  which  allow  longer  cable  length  with  less  chance  of  noise  and  interference  pickup 
than the earlier, unbalanced SYS-LINK Version 1.  Both versions operate at -2dBu line level.  V1 uses 
the 25way D-type connector.  V2 uses the 37way D-type connector.  Two consoles fitted with SYS-LINK 
V2  can  be  linked  using  a  36-core  shielded  cable  wired  one  to  one  to  two  37way  male  D-type 
connectors.    It  is  also  possible  to  connect  between  SYS-LINK  V2  and  V1.    This  requires  a  37way  to 
25way  adapter  cable  wired  to  unbalance  the  connections.    Wiring  details  are  provided  later.    The 
interconnecting cable is not included in the kit and should be sourced elsewhere or ordered separately 
from Allen & Heath. 
 
WZ316:2 / WZ312:2 / WZ320S SYS-LINK V2 output option 
Option kit  W312/16-SLV2  is available from Allen & Heath.  This can 
be installed in the WZ316:2, WZ312:2 or WZ320S console to provide 
a SYS-LINK V2 output connection.  Note that an input connection is 
not  provided.    These  consoles  may  be  used  as  ‘slave’  channel 
expanders  only.    For  information  on  fitting  the  option  refer  to 
document AP5735. 
 
WZ314:4:2 SYS-LINK V2 input and output option 
Option  kit  W31442-SLV2  is  available  from 
Allen  &  Heath.    This  can  be  installed  in  the 
WZ314:4:2 console to provide both SYS-LINK 
V2  input  and  output.    The  console  may  be 
used  as  either  a  ‘slave’  or  a  ‘master’.    For 
information  on  fitting  the  option  refer  to 
document AP5737. 
ALLEN&HEATH           WZ3 SYS-LINK V2              AP5736 issue 3 
Applications Note