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Digital inputs (CN 1)
All models, except PV-1830 and PV-1730 has 8 isolated digital inputs connected to a 10-pin box
header (CN1). All the inputs have ac-couplers with a common ground reference. Because of the ac-
couplers, the inputs can be activated with positive as well as negative input voltages. The table
shows the connector layout:
The input circuitry looks like this:
Counter inputs
The digital input section includes a 16-bit counter. Besides acting as normal digital inputs, input #0
and #1 can also be used as counter inputs.
• Input #0: counter input for the 16-bit counter.
• Input #0 together with input #1: counter inputs for a 16-bit quadrature counter.
The counter function can be software programmed to be in one of four modes.
The counter modes are shown here:
The software interface is explained in section PV-1800 register interface.
Pin no Name Pin no CDB-9F
1 Digital input #0 1
2 Digital input #1 6
3 Digital input #2 2
4 Digital input #3 7
5 Digital input #4 3
6 Digital input #5 8
7 Digital input #6 4
8 Digital input #7 9
9 GND 5
10 NC
Mode Function
0 Disabled
1 Increment on rising edges on DI #0
2 Increment on falling edges on DI #0
3 DI #0 and DI #1 act as a quadrature counter
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