Interfacing the assign 28, Expression pedal – Speck Electronics SSM User Manual
Page 23

Chapter 3 Installation Section
Expander pin assignment
The following chart represents the audio and power connections vailable 
at the 38 pin interface connector at the rear of the SSM. 
 
 
 
 
 
 
 
 
 
 
 
The Assign 28 is a self contained, 8 output assign/subgroup module 
designed to operate in conjunction with the Model SSM and SSM 
Expander. The Assign 28 receives its signals from the 1/4" direct output 
jacks at the rear of the SSM and SSM Expander. There are no special 
requirements for installation and interface to the Assign 28 except to use 
reasonable care in the layout of the audio cables. 
 
It it recommended that the Assign 28 be installed directly above or 
below the Model SSM. This will keep the cable lengths short, thereby 
reducing the susceptibility to hums and buzzes caused by EMI 
emissions. 
 
A 1/4" T.S. (tip, sleeve) to 1/4" T.S. cable is required for each "direct 
out" to "assign in" connection. If your mixer has 24 direct outputs (12 
stereo pairs), this would require 24 cables for connection to the Assign 
28. 
 
The Assign 28 also provides 8 stereo effects returns that may be 
interconnected to the 8 effects returns of the Model SSM. This would 
require 16 cables. It is recommended that multipair harnesses be used in 
lieu of numerous single cables. 
 
For more complete installation details, refer to the documentation that is 
supplied with the Assign 28. 
 
If you have decided to use the expression pedal feature on the SSM, it 
will be necessary to connect the cable and pedal to the system. 
 
The optional interface cable is wired with a 6 pin DIN connector on one 
end and four 1/4" plugs on the other end. The 6 pin DIN connector must 
be plugged into the female expression pedal connector located at the rear 
of the SSM. The four 1/4" phone plugs will be inserted into the 
corresponding jacks on any standard passive stereo volume pedal. 
PIN A 
PIN B 
PIN C 
PIN L 
PIN M 
PIN N 
PIN P 
PIN R 
PIN S 
COMMON 
PLUS 16.25 VDC 
MINUS 16.25 VDC 
EFFECT SEND 1 
EFFECT SEND 2 
EFFECT SEND 3 
EFFECT SEND 4 
EFFECT SEND 5 
EFFECT SEND 6 
PIN T 
PIN U 
PIN JJ 
PIN KK 
PIN LL 
PIN MM 
PIN NN 
PIN PP 
PIN RR 
EFFECT SEND 7 
EFFECT SEND 8 
PFL SIGNAL 
PFL SENSE 
SOLO SENSE 
SOLO SIGNAL-LEFT 
SOLO SIGNAL-RIGHT 
PROGRAM-RIGHT 
PROGRAM-LEFT 
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Interfacing the
Assign 28
Mounting location
Expression Pedal
Connecting the Assign 28
Connecting the Cable
18
