1794-IE8 Flex I/O Analog Input Module
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Product Description
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Flex IO High Density Analog Input Module
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Number of Inputs
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Eight (8) Single Ended
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Input Type
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0 to 20 mA; 4 to 20 mA; +/- 10VDC; 0 to 10 VDC
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Conversion Type
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Successive Approximation
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Data Format
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16 bit 2’s complement, left justified
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Resolution
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12 bits unipolar; Voltage: 11 bits plus sign bipolar 2.56mV/cnt unipolar; Current: 5.13mV/cnt bipolar 5.13µA/cnt
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Absolute Accuracy
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0.20% full scale @ 25 °C
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Accuracy Drift with Temperature
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Voltage Terminal - 0.00428% Full Scale/°C; Current Terminal - 0.00407% Full Scale/°C
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Terminal Base
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1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS
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Indicators
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1 green/red power/status indicator
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External DC Supply (Nominal)
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24V DC
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The 1794-IE8 is part of the Flex I/O series, designed as an analog input module for distributed I/O systems. This module operates alongside communication adapters and terminal bases to create flexible and efficient input/output architectures.
With eight (8) single-ended, non-isolated channels that can be user-configured to receive input signals of 0 to 20 mA, 4 to 20 mA, +/- 10 VDC, or 0 to 10 VDC, the 1794-IE8 is suitable for interfacing a wide variety of field devices. These include instruments like transmitters, analog indicators, recorders, and process controllers that generate compatible signal ranges.
The module features a resolution of 12 bits in unipolar mode and 11 bits plus sign in bipolar mode. It utilizes a successive approximation conversion method, storing the resulting data in a left-justified, 16-bit 2’s complement format. The conversion rate is 256 µs across all channels. It offers absolute accuracy of 0.20% full scale at 25°C and an accuracy drift of -0.00428% full scale/°C for voltage inputs and 0.00407% full scale/°C for current inputs. The module is factory-calibrated and does not require additional calibration.
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