A.3.3 B Module Process Input Type – Pulse
The B module (or E/D module) is required when connecting to digital densitometers. With the B
module, Analog Output #2 is never available, because the periodic time function uses the internal
timer counter that is normally used to generate the second analog output.
To configure a B module for Pulse Inputs, set the jumpers according to these instructions.
Configure Inputs 1 and 2 for one of three analog signal types:
• For 1-5 VDC Input, remove both RTD and 4-20 jumpers.
• For 4-20 mA Input, install the 4-20 jumper.
• For RTD Input, install the RTD jumper.
Configure Input 3 for pulse signal types:
• Remove all four “A” jumpers and install the two “P” jumpers.
• Remove the 4-20 jumper.
Configure Input 4 for pulse signal types:
• Remove all four “A” jumpers and install the two “P” jumpers.
• Signal coupling is instrument dependent.
− For AC coupled, install the two AC jumpers.
− For DC coupled, install the DC jumper.
• Signal threshold is instrument dependent:
− For a 1.5v threshold, remove the HI jumper.
− For a 3.5v threshold, install the HI jumper.
• Remove the 4-20 jumper.
Refer to Figure A-4 for default input and output jumper settings: Inputs Ch1 = 4-20mA,
Ch2 = 4-20mA, Ch3 = 4-20mA, Ch4 = AC coupled Pulse and Output Ch2 = RTD2.
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