D&R Vision Owner's Manual page 25

7.7 In/output connectors.
Every group module has the following connectors at the back of the housing.
The INSERT "A" is on a stereo jack socket.
The ground compensated GROUP output is a stereo 1/4" jack socket:
Note: The default setting on this output is -1 0dB V, a setting of -+ 4dBu can be chosen on the channel (PCB)
boards using jumpers.
The balanced RETURN input is a stereo 1/4" jack socket:
Note: The default setting on this output is -1 0dB V, a setting
of -+ 4dBu can be chosen on the channel (PCB) boards using jumpers.
The "B" section has identical connectors.
7.8 Jumper/connector information
J 4/14=Fader connector
J7/17=ledbar select
J9/19=return input level
J10/20=Aux1 pre/post select
J1 1/21 =Aux2 pre/post select
J25/26= Midi mute connector
Tip = return
Ring = send
Sleeve = shield
Tip = hot
Ring = cold
Sleeve = shield
Tip = hot
Ring = cold
Sleeve = shield
pin1=ground
pin2=wiper
pin3=top
pin1/2=group output
pin3/4=follows return
pin1/2= +4 dBu
pin3/4=- 1 0dBv
pin1/2=pre
pin3/4=post
pin1 /2=pre
pin3/4=post
1=Read
2=write
Vision manual page:25