Product Overview
The Allen-Bradley 1762-IR4 is a four-channel RTD and resistance input module designed for the MicroLogix family of programmable controllers. This module enables precise temperature measurement and resistance monitoring in a compact, DIN-rail or panel-mount package. It supports a wide range of RTD types, including platinum, copper, and nickel elements, making it a versatile choice for industrial automation applications.
Key Features & Benefits
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Four input channels for simultaneous RTD or resistance measurements
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Wide RTD compatibility: 100Ω, 200Ω, 500Ω, 1000Ω platinum (385 and 3916 curves), 10Ω copper, 120Ω nickel, and 604Ω nickel-iron
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Flexible wiring: Supports 2-, 3-, and 4-wire RTD connections
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Multiple resistance ranges: 0-150Ω, 0-500Ω, 0-1000Ω, 0-3000Ω
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Selectable input filters: 10 Hz, 50 Hz, 60 Hz, 250 Hz, 500 Hz, 1 kHz
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Delta-Sigma conversion for accurate analog-to-digital conversion
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Low heat dissipation of 1.5 Watts
- Compatible with MicroLogix 1100, 1200, and 1400
Technical Specifications
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Function |
Resistance Module |
| Part Number / Catalog No. |
1762-IR4 |
| Converter Type |
Sigma-Delta |
| Product Family |
MicroLogix |
| Inputs |
4 |
| Heat Dissipation |
1.5 Watts |
| Product Type |
RTD / Resistance Input Module |
| No. of Inputs |
Four (4) |
| UPC |
10611320861676 |
| Compatible RTD Sensors |
100Ω Platinum 385, 200Ω Platinum 385, 500Ω Platinum 385, 1000Ω Platinum 385, 100Ω Platinum 3916, 200Ω Platinum 3916, 500Ω Platinum 3916, 1000Ω Platinum 3916, 10Ω Copper 426, 120Ω Nickel 672, 120Ω Nickel 618, 604Ω Nickel-Iron 518 RTD; 2-Wire, 3-Wire, 4-Wire RTD |
| Compatible Resistance Signals |
0 to 150Ω, 0 to 500Ω, 0 to 1000Ω, 0 to 3000Ω |
| Compatible Controllers |
MicroLogix 1100 / 1200 / 1400 |
| Data Formats |
Raw/proportional, engineering units x1, engineering units x10, scaled-for-PID, percent full scale |
| Input Filters |
10 Hz, 50 Hz, 60 Hz, 250 Hz, 500 Hz, 1 kHz |
| Resolution |
Input filter and configuration dependent |
| Conversion Method |
Delta-Sigma |
Industry Applications
The 1762-IR4 excels in temperature monitoring applications across various industries. In process control, it provides accurate readings for ovens, furnaces, and heat treatment equipment. In HVAC systems, it monitors duct temperatures to optimize energy efficiency. The module also supports displacement measurement using resistance-based sensors, making it useful for position feedback in hydraulic cylinders and clamping mechanisms.
Installation & Setup
Mount the 1762-IR4 on a DIN rail or panel using the built-in mounting slots. Connect the RTD or resistance sensors to the terminal block following the wiring diagram for 2-, 3-, or 4-wire configurations. Use a finger-safe cover to protect the terminals. After installation, configure each channel's input filter, data format, and calibration settings via the MicroLogix programming software. The module auto-calibrates on channel enable, but you can also schedule calibration every 5 minutes if needed.
Maintenance & Reliability
The 1762-IR4 requires minimal maintenance. Periodically inspect the terminal connections for tightness and check the diagnostic LED for status or fault indications. Keep the module clean and dry, and avoid exposure to electrical noise or excessive heat. The module performs self-diagnostics on both module and channel levels, helping you identify issues quickly. With proper care, this module delivers reliable service for years, reducing downtime and maintenance costs.
Compatibility & Integration
This module is designed for seamless integration with MicroLogix 1100, 1200, and 1400 controllers. It connects via the 1762 bus interface, which supplies 5V and 24V DC power. The module uses 6 input words and 5 configuration words, allowing straightforward data exchange with the PLC. You can configure data formats as raw/proportional, engineering units, scaled-for-PID, or percent full scale to match your application requirements.
Buying Guide
When purchasing the 1762-IR4, verify that your controller is a MicroLogix 1100, 1200, or 1400 and that you have the necessary RTD or resistance sensors. Ensure the sensor types and resistance ranges match the module's specifications. PLC Source PRO offers genuine Allen-Bradley 1762-IR4 modules with fast shipping and reliable support. Order today to enhance your automation system's temperature measurement capabilities.