CFSound-II Digital Audio System
Copyright©1992-2006 by ACS, Sarasota, Florida
19
ALL RIGHTS RESERVED
CFSound II Contact I/O 8 Module
This module provides eight contact inputs and eight contact outputs. The contacts are numbered 1
through 8 and are associated with sound files named 01.WAV through 08.WAV. If an S token is present
in the sound filename, the associated output contact and on-board PTT relay will be activated whenever the
sound is played.
The CFSound II Contact I/O 8 Module provides eight opto-isolated current inputs. The Cathodes of
the LEDs in the optocouplers are connected to the Input connector port pins. The Anodes of the LEDs in
the optocouplers are connected to an internal 12VDC power supply, with a 680 ohm current limiting
resistor in series. The output transistor of each optocoupler has a 10K pullup resistor on its collector, with
the emitter connected to ground and is buffered by an inverting gate. The following diagram is
representative of one input:
INPUTx
GROUND
VEE
+5v
680
ohm
10K
ohm
An input is activated by sinking current from the corresponding input pin to ground. A Ground
connection is supplied on pins 1, and 10 of the Inputs connector INP1 for this purpose. The input current
sink requirement is approximately 15 mA.
The Inputs connector INP1 is a 10 pin, 2 piece terminal block pluggable style. The pinout is shown in
the following diagram and table:
IN
P
U
T
8
IN
P
U
T
7
IN
P
U
T
6
IN
P
U
T
5
IN
P
U
T
4
IN
P
U
T
3
IN
P
U
T
2
G
R
O
U
N
D
IN
P
U
T
1
G
R
O
U
N
D
1
2
3
4
5
6
7
8
9
10
INP1
INP1 Pin #
Signal
1
GROUN
D
2
INPUT1
3
INPUT2
4
INPUT3
5
INPUT4
6
INPUT5
7
INPUT6
8
INPUT7
9
INPUT8
10
GROUN
D
The CFSound II Contact I/O 8 Module provides eight normally open (N.O.) relay contact outputs.
Outputs 3, 4, 7 and 8 also provide the normally closed (N.C.) relay contact outputs.
