Owner manual
Installation and Quick Start Guide
Rio Rancho, NM
13
RS-232 Serial Port Wiring
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
DCD
RX
TX
DTR
GND
DSR
RTS
CTS
RI
TX
RX
GND
Host 
Serial 
Port 
(PC)
ASPEN 
RS-232 
Port
Wiring Diagram
ASPEN Device to PC
DTE pin 
functions
Female 
connector
Male 
connector
DCE pin 
functions
Female 
jack
Male jack
Crestron
®
 RS-232 Port Wiring
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
RX
TX
GND
TX
RX
GND
Crestron 
RS-232 
Port
ASPEN 
RS-232 
Port
Wiring Diagram
Female 
connector
Male 
connector
Female jack
Male jack
Programmable Inputs
Programmable inputs are provided to enable external 
control over a variety of parameters. Each input can 
respond to a contact closure, a DC voltage source, 
or the variable voltage output from a potentiometer. 
The following illustrates common connections to the 
programmable input pins.
10K Linear Potentiometer
CCW
CW
+5V
To  Programmable Input Pin
Gnd
Contact Closure as Programmable Input
To  Programmable Input Pin
Gnd
DC Voltage Source as Programmable Input
To  Programmable Input Pin
0VDC (Off) to +5VDC (On)
Gnd
Potentiometer Connection for
Analog Control of Gain
Programmable
Inputs
Programmable
Outputs
Ground
+5VDC
Programmable Outputs
Programmable outputs are used for several purposes:
• indicatethecurrentstateofaprogrammableinput
• monitoractivityonaudioinputchannels
• monitoractivepresetchanges
Each programmable output is the electrical equivalent 
of a contact closure to ground. When a programmable 
output is “active” it conducts current to ground. When 
the programmable output is “inactive,” no current flows 
to ground. The maximum usable voltage for the pro-
grammable outputs is 40 V and they will safely conduct 
up to 100 mA DC continuous.
Both LEDs and 5V relay coils can be powered by the 
+5 V DC pins on the programmable input connector, as 
long as the maximum combined current for all LEDS 
and relay coils does not exceed 100 mA.
380 Ohms 
Pro gr amma b le Output Pi n 
380 Ohms 
Programmable Output Pin
1N4001 
or equi v . 
Exte r na l 
DC V oltag e
Source 
(<40VDC) 
Rel a y Coi l 
Coil current <100mA 
Pro gr amma b le Output Pi n 
Relay is on when the programmable output is active
+5VDC
+5VDC
GND
LED is ON when the programmable output is active
GND
LED is OFF when the programmable output is active
Note: The diagram above shows an external DC source 
powering the relay coil. This is necessary whenever coil volt-
ages exceed 5 volts.
LED
380 TO 
500 OHM
10K 
LINEAR 
POT
CW
CCW
IN 1
IN 3
ON
OFF
LOGIC OUTPUTS
GROUND
5VDC
LOGIC INPUTS
LOGIC 
OUT 7
LOGIC IN 3
ANODE CATHODE
Cathode
Anode










