Digital inputs CN, Mode Function | Micro Technic 1800 Series

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:

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

The input circuitry looks like this:

1#+@5=&6

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:

Mode Function

0Disabled

1Increment on rising edges on DI #0

2Increment on falling edges on DI #0

3DI #0 and DI #1 act as a quadrature counter

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The software interface is explained in section PV-1800 register interface.

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Digital inputs (CN 1)

Pin no

￿￿1#+￿@￿5￿￿￿￿=&￿6

Counter inputs

Mode Function

1#+@5=&6