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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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