Overview
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-IR6 |
| Brand | Allen-Bradley |
| Product Type | RTD Analog Input Module |
| Product Line | CompactLogix |
| UPC | 611320314410 |
| Number of Inputs | 6 |
| Input Type | RTD |
| Input Ranges | 0 to 150 Ohms, 0 to 500 Ohms, 0 to 1000 Ohms, or 0 to 3000 Ohms |
| Converter Type | Sigma-Delta |
| Current Draw at 5.1 VDC | 100 mA |
| Current Draw at 24 VDC | 35 mA |
| Maximum Heat Dissipation | 1.5 W |
| Common Mode Voltage | -10 to 10 VDC |
| Maximum Cable Impedance | 25 Ohms |
| Input Impedance | Greater than 10 MOhms |
| Operating Temperature | 0 to 60 deg C (32 to 140 deg F) |
| Storage Temperature | -40 to 85 deg C (-40 to 185 deg F) |
| Relative Humidity | 5% to 95%, non-condensing |
| Weight | 0.28 kg (0.63 lbs) |
RTD Input Configuration
The 1769-IR6 provides six RTD input channels for resistance-based temperature measurement. Each channel supports selectable resistance ranges of 0 to 150 Ohms, 0 to 500 Ohms, 0 to 1000 Ohms, and 0 to 3000 Ohms. Therefore, the selected range should correspond to the connected sensor’s resistance characteristics and measurement requirements.
Signal Conversion and Electrical Characteristics
The module uses a sigma-delta converter to process incoming RTD signals and produce digital measurement values. Its input impedance exceeds 10 MOhms, while the maximum cable impedance is 25 Ohms. These electrical characteristics are relevant when evaluating sensor wiring and signal measurement conditions.
Furthermore, the module draws power from both the 5.1 VDC and 24 VDC backplane supplies. Its maximum heat dissipation is 1.5 W, which should be considered when evaluating the power and thermal requirements of the I/O installation.
Frequently Asked Questions
Q: How many RTD sensors can the 1769-IR6 accommodate?
A: The 1769-IR6 supports up to six RTD input channels, allowing the controller to acquire temperature measurement signals from multiple sensors.
Q: What resistance ranges does the 1769-IR6 support?
A: It supports four selectable resistance ranges: 0 to 150 Ohms, 0 to 500 Ohms, 0 to 1000 Ohms, and 0 to 3000 Ohms. The appropriate range depends on the connected RTD sensor.
Q: What conversion technology does the 1769-IR6 use?
A: The module uses sigma-delta conversion technology to process analog RTD input signals into digital measurement values for controller processing.
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