Module Function Overview
The 1756-IRT8I is an RTD input module for ControlLogix systems, specifically designed to acquire precise temperature data from resistance temperature detectors. This module converts RTD resistance changes into digital temperature values, enabling accurate thermal monitoring in industrial control environments.
This module is typically used in applications where temperature stability and measurement accuracy are critical, such as process control, power systems, and equipment protection.
Key Operating Characteristics
8-channel isolated RTD inputs
Direct temperature measurement without external signal conditioners
High-resolution conversion ensures stable temperature feedback
Integrated diagnostics detect sensor open/short conditions
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Allen-Bradley |
| Product Family | ControlLogix |
| Model Number | 1756-IRT8I |
| Module Type | RTD Input Module |
| Input Channels | 8 |
| Available Input | -100…100 mV |
| Temperature Range (Pt100) | approx. -200…+850 °C |
| Resolution | 0.1 °C |
| Accuracy | ±0.3 °C (typical, Pt100) |
| Channel Isolation | Channel-to-backplane |
| Number of Bits | 24 bits |
| Update Rate | Configurable |
| Backplane Current | approx. 0.8 A @ 5 V DC |
| Operating Temperature | 0…60 °C |
| Storage Temperature | -40…85 °C |
| Mounting | ControlLogix chassis |
| Status Indication | Module and channel diagnostics |
Installation Notes
Direct installation into ControlLogix chassis slots
Shielded RTD wiring for enhanced interference resistance
Correct wiring configuration (2/3/4-wire) must match module settings
Configured via RSLogix/Studio 5000
Product-Focused FAQ
Common Problem
Which temperature sensors are compatible with the 1756-IRT8I?
It supports common industrial RTDs, including Pt100, Pt1000, nickel (Ni), and copper (Cu) types.
How many temperature points can a single module handle?
Each module supports up to 8 independent RTD inputs.
Is external signal conditioning required?
No, RTD signals are processed directly by the module.
Can different RTD types be used on different channels?
Yes, each channel can be configured independently.
Our Background
competitive price – PLC Export
Industrial Automation Reliability
Leveraging a mature global supply chain, ControlLogix modules (such as the 1756-IRT8I) consistently meet routine replacement and emergency maintenance needs, effectively reducing the risk of unexpected downtime.
Focused System Solutions
Procuring ControlLogix temperature control modules, I/O modules, and controller modules through a single channel significantly enhances system integration efficiency and long-term maintenance predictability.
Message Us Anytime
| Contact Method | Details |
|---|---|
| sales3@mooreplc.com | |
| WhatsApp / Phone | +86 180 2071 4662 |
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