User guide

P/N: 021-00154, Rev. A.6 - updated for V4.7 Tools Page | 32

3.11 Analog Inputs

Voltage conditioning for Analog Inputs

All inputs on the DVCs are rated for a Maximum of +/-32 Volts. The working voltage on the universal and analog

inputs for the dvc7/10/710 is 0 to +5 Volts (optional +/- 1, 0 to +10 volts for the DVC10/710). The signal will

need to be clamped positive or negative that exceeds 32 Volts. Suggest clamping to 28 Volts.

Analog inputs are 0-5V level reading inputs. There are 2 such inputs on the DVC5 and DVC7. The DVC10 has

3 Analog inputs. Analog inputs return the value of the voltage at an input pin to the application as a percentage

of the calibrated voltage range represented by a ten-bit value (0 (0%) ->1023 (100%) decimal). The resolution is

to the nearest tenth of a percent.

New with the 4.7 release each Analog input can be configured as a digital input by selecting the Active High or

Active Low button in the lower right hand corner of the configuration window. When one of these is selected the

Ana_1 name will be set to true when the voltage input exceeds 2.5 volts for Active High and false for Active

Low. NOTE: Analog Inputs are internally pulled High through a 1M Ohm resistor. Therefore, if selected to be

used as an Active High Digital Input, the input may not be allowed to float when not in use. An external 2K

resistor between the input pin and ground may be used to Pull down the input pin.

On the DVC5/10 controllers each Analog input has a corresponding reference output to make the wiring of

potentiometers easier. Each Analog input can be configured to only sense the input voltage or to supply power

to the circuit using the reference output pin and sense the input. The DVC7 has one common reference output

that can be used by several Analog input circuits as long as the total current load of 500ma is not exceeded.

to DVC5/10 Analog In Pin

0 to ~4.55 volts

To DVC7 Analo

In Pin 0 to 5volts

DVC POT REF Pin

(1K ohm resistor connected to

+5v

Or +5V regulated 500ma

output)

Potentiometer -10k ohm