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Chapter 1, Module Overview
User’s Manual Pub. 0300322-01 Rev. B
measurements. The module supports:
•
Eight analog input channels for the 2085-IT8-SC.
•
Sixteen analog input channels for the 2085-IT16-SC
•
The modules measure either voltage or provide data measurements of
temperature using thermocouple and CJ sensor voltage inputs for each
channel.
•
Direct voltage measurements. The low-drift precision resistor is not used,
and the channel accepts the voltage source directly.
•
Direct thermocouple. For both modules, two cold junction sensors are
available to be placed at the top and bottom of each terminal block. The
module measures thermocouple and CJ Sensors voltages and converts
the results to a temperature reading.
•
Two physical Cold Junction Compensation sensors (one at top, one at the
bottom of each terminal block), and two CJC profiles (averaged and
distributed) are supplied.
•
Four data formats.
•
Four filter frequency selections.
•
Real-time Terminal Block temperature updating when the channel is
enabled.
•
Range scaling of input data.
•
Alarm notification on each channel’s status:
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Over or under range detection (from user-defined values).
-
Open circuit detection for current measurement on the 4-20 mA
range, voltage, and thermocouple measurements.
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ADC Communication fault detection.
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Channel bias adjustments for each channel.
-
An option to disable open-wire detection for volt, millivolt, and
thermocouple measurements.
All inputs have fault tolerance and ESD protection to avoid damage to circuitry
on the board. The modules use 50 VAC working Reinforced Insulation between
the inputs and the backplane, and low-level (10 VDC) channel-to-channel
isolation.
The 2085-IT8-SC module uses a 20-bit Sigma-Delta analog-to-digital converter
to achieve a 16-bit resolution. The 2085-IT16-SC module uses two 20-bit Sigma-
Delta analog-to-digital converters to achieve a 20-bit resolution. However, some
of the formats display the result in 16-bit resolution. The modules measure
thermocouple and CJ Sensors voltages and convert the results to a temperature
reading.
Each input channel is individually configurable via Rockwell-provided
Connected Component Workbench (CCW) software for the Micro850 and
Micro870 family controllers or with the Module Configuration Converter (MCC)
utility from Spectrum Controls, Inc.
The module is factory calibrated and tested before shipping. After installation,
the modules begin operation in a default, usable condition. During power startup,
all inputs are disabled and off until a valid configuration has been received.
