The basic i/o 1 – I-O Display Systems Basic I/O Product User Manual

Page 7

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The Basic I/O 1

1-2(Vol.1)

A notable feature of the BASIC I/O is its ability to gather data and perform ranging and
statistical operations on raw data before it is sent to the Host. The Host can thus spend less
time manipulating data and more time gathering it. The following sections discuss the
different signals the BASIC I/O can handle.

ANALOG INPUTS:
duTec analog input modules are 100% isolated and accept a wide range of voltages, currents,
the outputs of thermocouples, RTDs, and 590 type temperature probes.

BASIC I/O instructions provide linearized thermocouple and RTD sensor data. Engineering
unit conversion is performed by the host software, such as duTec’s EASYIO program
generator.

The BASIC I/O samples individual analog inputs at the constant rate of samples per second.
The effective sample rate per channel is determined by the total number of channels to be
sampled.

Analog input instruction types are:

Input Value

Determines signal levels, with 12 bit (1 part in 4096) resolution

Offsets

Input values can be software offset or “Zeroed” with 12 bit (1 part in
4096) resolution over the module’s specified range.

Gain/Slope

The amplitude of input values can be software multiplied by factors
ranging from 0.25 to 4.0.

Range Limits

The occurrence of input values falling out of user defined upper or
lower limits can be flagged.

Minimums

The minimum level of input values can be captured.

Maximum

The maximum level of input values can be captured.

Averages

Can calculate average input amplitude for 1-65,535 samples.

Temperature

Provides linear temperature in C for thermocouples, RTD and type
590 temperature probes.

Thermocouple modules provide cold reference junction compensation

.

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