Service manual

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Functional Description
DCB, DCFCB and DCFCTB Models
#3 is reserved for a 2001AC disconnect option. Relay #4 is reserved for the low
voltage cutoff feature.
Speaker Output
You can use the speaker output at JP2 to monitor received audio, route remote P.A.
or provide signal out when the tone generator option is used. You can adjust speaker
output up 2.0 V
p-p
into an 8-Ohm load using R61.
Monitor Received Audio
When carrier is present, the received audio is routed to the test speaker output at JP2.
Remote Public Address
You need to program the P.A. as a function through the software if it is to be used.
When the P.A. function is activated, the DCFCTB routes the received audio to the
speaker output as long as carrier is detected. If the carrier drops out for more than
15 seconds, the unit goes back to standby mode.
Audio Function Generator Option
To use this feature, you need to program one of the standard signals or a custom
signal through the software. When the audio function is activated, the audio from the
function generator is routed to the speaker output until the function finishes or a
cancel code is sent.
Landline and Local Pushbutton Activation
You can activate the first four (4) pre-programmed functions locally through the
pushbuttons, on the DCFCTB PCB, or remotely by grounding one of the landline
activation inputs at JP12 for at least one second. The remote inputs are protected by
limiting diodes and cannot exceed 5.1 Volt. Each pushbutton is labeled with its
associated function.
The remote inputs on JP10 are identified as follows:
JP10
Pin-out
Pin #1
EXTERNAL AC SENSOR INPUT
Pin #2
common
Pin #3
ROTATOR CURRENT SENSOR INPUT
Pin #4
common
Pin #5
FUNCTION #4
Pin #6
common
Pin #7
FUNCTION #3
Pin #8
common
Pin #9
FUNCTION #2
Pin #10
common