Configured for high-accuracy temperature measurement in PLC-5 I/O chassis platforms, the Allen-Bradley 1771-IR/D (1771-IR/D RTD Input Module) provides direct physical/electrical execution.
Hardware Specifications
Parameter
Specification
Model
1771-IR/D
Brand
Allen-Bradley
Origin
USA / Global Manufacturing standard
Weight
1 lbs 7.0 oz (0.7 kg)
Dimensions
6.0" x 2.0" x 11.0" (15.2 cm x 5.1 cm x 27.9 cm)
Operating Temp
0 to 60 deg C (32 to 140 deg F)
Power Consumption
Powered via 1771 I/O chassis backplane
Module Type
Analog RTD Input Module
Number of Inputs
6 RTD input channels
Sensor Compatibility
Resistance Temperature Detector (RTD) sensors
Compatibility
Allen-Bradley PLC-5 and 1771 Series I/O systems
PLC-5 I/O Density Scaling & Backplane Bus Integration
The 1771-IR/D processes signals across 6 independent RTD temperature channels within Allen-Bradley 1771 I/O systems. Converting resistance values into digital data for the controller, the board supports precise analog input scaling across high-density I/O configurations. The module processes field sensor signals with high noise immunity while maintaining deterministic timing, ensuring uninterrupted operation without causing backplane bus communication velocity degradation across the 1771 backplane bus.
Frequently Asked Questions
Q: Does the 1771-IR/D support hot-swapping while the 1771 I/O chassis is energized?
A: No. Chassis power must be disconnected before inserting or removing the 1771-IR/D module to prevent backplane electrical transients and hardware damage.
Q: What sensor types are compatible with the 1771-IR/D module input channels?
A: The module is designed specifically for direct interface with Resistance Temperature Detector (RTD) sensors across all 6 input channels.
Field Installation Guidelines
Turn off main power to the 1771 I/O chassis before installing the module.
Wear a grounded ESD wrist strap to protect sensitive analog circuitry from static discharge.
Align the 1771-IR/D card edges with the designated chassis slot guides and press firmly until fully seated.
Route RTD field sensor wiring using shielded twisted-pair cables, connecting shields to chassis ground at one end only.
Secure the field wiring arm and verify module status via processor I/O configuration settings upon powering up.
