Extron electronics RAC 104 User Manual page 6

Quick Start Guide — RAC 104, cont'd
Step 4
If the RAC 104 is to be connected to a computer or host controller for
remote control, connect the host's RS-232 cable to the RAC 104's
3-pole captive screw RS-232 connector. Wire the connector as shown
below. See chapter 3 for more information on remote control.
Transmit (Tx)
Receive (Rx)
Ground (Gnd, )
Step 5
Set the line level selector DIP switches to -10 dBV
(unbalanced, consumer line level) or +4 dBu (balanced,
professional line level).
Step 6
Connect power cords. Wire the RAC 104's power connector as
shown below.
CAUTION
Smooth
Ridges
A A
Power Supply
Output Cord
Step 7
Turn all the equipment on.
Step 8
Set volume, bass, and treble levels using the front panel controls,
Simple Instruction Set commands, or the Extron Audio Products
Control Program. See chapters 2 and 3 for more information.
QS-2 RAC 104 • Quick Start Guide
Pin RS-232 function
1
2
3
When connecting the power supply, voltage polarity is
extremely important. Applying power with incorrect
voltage polarity could damage the power supply and the
RAC 104. Identify the power cord negative lead by the
ridges on the side of the cord or a black heat shrink
wrapping around it.
SECTION A–A
The two power cord wires must be kept separate while the
power supply is plugged in. Remove power before
wiring.
Description
Tx Transmit data
Rx Receive data
Gnd Signal ground
IN OUT
A B A B
ON
+4 dBu
-10 dBV
LINE LEVEL
Tie Wrap
Orange Captive Screw
Connector