Studio Technologies 58 2000 - Manual (Page 19)

Issue 4, December 2000 Model 58/59 User Guide
Page 20 Studio Technologies, Inc.
for Surround
Control Console converts its performance
to logarithmic.) Any high-quality pot with a
nominal “coil” resistance of between 1k
and 25k ohms should work fine. Simply
connect the D-sub to the pot in this fash-
ion: Pin 7 to counterclockwise, pin 8 to
wiper, and pin 9 to clockwise. As very little
current (amps) travels through the wiring
and pot, there is really no practical maxi-
mum cable length. Be aware that the
longer the cable run, the more chance that
an accidental short circuit could take
place. This is a serious issue, as a short
circuit could cause the monitor output level
to go to maximum.
Warning: Connecting to the remote
level control input requires very careful
attention to wiring and potentiometer
connections. Shorting pin 8 of the 9-pin
D-sub connector to common will raise
the monitor output level to maximum!
To address hearing safety issues, the
Model 59 is default configured to dis-
able the remote level control input. A
safe and reliable installation must be
completed prior to enabling the input.
Connecting the Model 59 to a
Model 58
A cable with 9-pin D-sub plugs (males)
on each end is used to interconnect a
Model 59 Control Console with a Model 58
Central Controller. A 20-foot (6.1m) cable
is provided with each Model 58/Model 59
base configuration. Should a cable of
different length be required it should be
wired in a one-to-one fashion for all 9 pins.
Pin 1 carries power supply common, and
must be interconnected using a conductor.
A cable shield connection should be con-
nected to pin 1 at one, or both, ends.
For best performance the cable generally
should not exceed 50 feet (15.3m) in
length. The reality is that a cable much
longer in length should work, as long as
an excellent-quality cable is utilized. We
define “excellent” as extensive shielding
along with very low capacitance. The low
cable capacitance limits the amount of
data-signal waveform distortion. As far
as the maximum length, go ahead and
try it—if it works, it works!
Each Model 58 contains a 9-pin D-sub,
labeled TO/FROM CONTROL CONSOLE.
Select one of these for connection to the
Model 59. While it doesn’t technically
Pin Signal Direction
1 Power Supply Common, Model 58 units to
Cable Shield Model 59
2 +15Vdc Model 58 units to
Model 59
3 Data Model 59 to
Model 58 units
4 Data Common Model 59 to
Model 58 units
5 Contact Input 1 Remote Contact to
Model 59
6 Contact Input 2 Remote Contact to
Model 59
7 CCW Remote Level
Potentiometer to Model 59
8 Wiper Remote Level
Potentiometer to Model 59
9 CW Remote Level
Potentiometer to Model 59
Notes: 1) Connector type on Model 58 is 9-pin D-subminiature
female. Connector uses 4-40 threaded inserts for
locking with mating plug.
Figure 10. Connections for Control Console
and Remote Control Inputs
Level
Control