Parker Vansco User Manual

User Guide 13
Inputs
3.1.2.1. Analog Input Capabilities
The following table provides specifications for the VMM2404 analog inputs:
Analog Input Specifications
Item
Min
Nom
Max
Unit
Input voltage range
0
-
32
V
Overvoltage
-
-
36
V
Pull-up / down resistance
3.1 k
-
3.5 k
Ω
Input resistance – pull-up/pull-down
disabled
81 k
-
-
Ω
Input capacitance
9
10
11
nF
Cutoff frequency (hardware)
4
-
12
-
kHz
Accuracy
-
-
3
%
Resolution
5
4.375
-
4.422
mV
Analog gain
-
Program-
mable
-
V/V
Reference voltage
2.984
3.0
3.016
V
Leakage current sleep mode
- pin @ 12 V
-
-
4.1
mA
3.1.2.2. Analog Input Configuration Options
If one of the VMM2404’s multi-purpose inputs is configured as an analog input,
the input will be converted by the microprocessor using a 10-bit analog to digital
converter (ADC) that is referenced to 3.0 V.
There are 4 programmable gain and attenuation factors (shown in the table below)
that allow you to optimize the voltage resolution for each analog input, by
converting the maximum external voltage signal expected on an analog input to as
close to 3.0 V as possible.
The attenuation and gain columns in the following table represent the state of the
attenuation transistor and gain transistor on each analog input circuit.
4
Assumes there is a zero ohm impedance from driving source. The actual cutoff in the application will be partially determined
from the source impedance and VMM input capacitance.
5
10 bit ADC at worst case reference voltage, with 0.5 LSB fault.

Parker Vansco Specifications

General

Brand	Parker
Model	Vansco
Category	Control Unit
Language	English