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UPC10885630245420
BrandAllen-Bradley
Inputs8 Isolated Channels
SeriesControlLogix
UNSPSC32151705
Resolution24 bits 0…510 ?: 0.06 m?/count 0…1020 ?: 0.12 m?/count 0…2040 ?: 0.25 m?/count 0…4080 ?: 0.50 m?/count -101…101 mV: 0.01 ?V/count
Data FormatIEEE 32-bit floating point
Input Range1…500 ? 2…1000 ? 4…2000 ? 8…4000 ? -100…100 mV
Module TypeAnalog RTD / Thermocouple / milivolt Module
ManufacturerIndustrial Automation
No. of InputsEight (8) Point Isolated RTD / Thermocouple / milivolt
Module Scan Time1 ms
Isolation Voltage250 Volts Continuous
Compatible RTD Type100, 200, 500, 1000 ? Platinum, alpha=385 100, 200, 500, 1000 ? Platinum, alpha=3916 120 ? Nickel, alpha=672 100, 120, 200, 500 ? Nickel, alpha=618 10 ? Copper, alpha=427
Thermal Dissipation15.7 BTU per hour
Programming SoftwareRSLogix 5000; Studio 5000 Logix Designer
RSLogix 5000 SoftwareVerson 8.02.00 or later
Current Draw (24 Volts)150 milliamps
Part Number/Catalog No.1756-IRT8I
Power Dissipation (Max)4.6 W
Current Draw (5.1 Volts)200 milliamps
Removable Terminal Blocks1756-TBNH, 1756-TBS6H
Backplane Current (5Volts)250 mA
Power Dissipation (Maximum)4.6 Watts
Backplane Current (24 Volts)150 mA
Backplane Current at 24 Volts2 milliamps
Compatible Thermocouple TypesB, C, D, E, J, K, N, R, S, T, TXK/XK (L)
Allen-Bradley

1756-IRT8I

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Ready to ShipPLCsControlLogix 1756

The Allen-Bradley 1756-IRT8I is a ControlLogix module with eight isolated analog RTD, thermocouple, and millivolt input channels. Compatible with a variety of RTD and thermocouple types, it offers 24-bit resolution and requires RSLogix 5000 software version 8.02.00 or later for programming.

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Overview of Allen-Bradley 1756-IRT8I

The Allen-Bradley 1756-IRT8i is an 8-channel isolated thermocouple/mV input module that belongs to the ControlLogix line of controllers. It is designed to monitor and control process temperatures, making it an essential component in various industrial applications such as heating, ventilation, air conditioning, and refrigeration systems. The module provides high precision temperature measurements by directly connecting to thermocouple sensors.

Key Features

The 1756-IRT8I boasts several key features that ensure accurate and reliable performance. Among these are its isolated inputs which prevent signal interference between channels, high-resolution data with 16 bits of resolution, and an onboard Cold Junction Compensation (CJC) for each channel. It also supports a wide range of thermocouple types, including J, K, T, E, R, S, B, and N, which offers flexibility in terms of various temperature measurement needs.

Integration and Compatibility

Designed for seamless integration with Allen-Bradley's ControlLogix system, the 1756-IRT8I module utilizes the 1756 backplane for communication. The module can be easily configured using the Studio 5000 Logix Designer application. It is compatible with other modules in the ControlLogix family, allowing it to be integrated into a comprehensive control system solution.

Performance and Diagnostics

This input module is geared to provide both high performance and reliability. It includes diagnostic features that help in the detection of sensor failures, over-range and under-range alarms, and module health status. These diagnostics assist maintenance personnel in identifying and troubleshooting issues quickly, thereby minimizing downtime.

Safety and Environmental Specifications

The Allen-Bradley 1756-IRT8I is designed to operate within a specific range of temperatures and environmental conditions. Adherence to these specifications ensures the longevity and reliability of the module. Users must also observe safety measures to protect the module from electrical hazards and to guarantee secure operation within their industrial systems.

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