Allen-Bradley 1756-IRT8I ControlLogix 8 Channel RTD Module

Product Overview

The Allen-Bradley 1756-IRT8I is a high-performance analog input module. It belongs to the ControlLogix series. This module offers eight isolated channels. It supports RTD, thermocouple, and millivolt signals. The module provides 24-bit resolution for precise measurements. It draws 200 mA at 5.1 Volts and 150 mA at 24 Volts. Maximum power dissipation is 4.6 Watts. This module ensures accurate data conversion. It uses IEEE 32-bit floating point data format. The scan time is just 1 ms. This makes it ideal for demanding industrial applications.

Application Scenarios

This module works well in process control systems. It monitors temperature in chemical plants. It reads data from various sensors in manufacturing lines. It is perfect for oil and gas facilities. The module handles both RTD and thermocouple inputs. This flexibility reduces the need for multiple modules. It fits into ControlLogix chassis seamlessly. Engineers use it for high-speed temperature monitoring. It ensures reliable data acquisition in harsh environments.

Technical Specifications

The 1756-IRT8I supports multiple RTD types. These include 100, 200, 500, and 1000 Ohm platinum with alpha=385. It also supports nickel and copper RTDs. Thermocouple types include B, C, D, E, J, K, N, R, S, T, and TXK/XK (L). Input ranges cover 1 to 500 Ohms up to 4 to 4000 Ohms. The millivolt range is -100 to 100 mV. Continuous isolation voltage is 250 Volts. Backplane current at 5 Volts is 250 mA. Thermal dissipation is 15.7 BTU per hour. The module uses removable terminal blocks 1756-TBNH or 1756-TBS6HI.

Installation & Maintenance Guide

Install the module into a ControlLogix chassis. Ensure the backplane power is off. Slide the module into the slot until it locks. Connect the wiring to the terminal block. Use the correct thermocouple or RTD wires. Tighten screws to secure connections. Power on the system and configure the module in software. For maintenance, check connections periodically. Keep the module free from dust and moisture. Replace the terminal block if damaged.

Packing List

One Allen-Bradley 1756-IRT8I module. One 1756-TBNH terminal block. One 1756-TBS6HI terminal block. No additional accessories are included. Shipping is via Fedex, UPS, or DHL.