Product Overview

The 1794-IE8H is an 8-channel analog input module from Allen-Bradley. It uses the HART communication protocol. This module accepts 0-20 mA and 4-20 mA signals. It has 16-bit resolution with 0.1% accuracy. The module fits into Flex I/O systems. It works with controlNet, Ethernet, and ProfiBus adapters. You can configure the input filter cutoff. You can also set fault mode, data format, and error levels. The module detects lead breakage and over/under range alarms. It has a remote transmitter alarm feature.

Application Scenarios

The 1794-IE8H suits process control environments. It monitors pressure, temperature, and flow. It works well in chemical plants and refineries. The HART protocol allows smart instrument communication. You can access device diagnostics and calibration data. The module supports high-speed data updates. It is ideal for critical loops that need accuracy.

Technical Specifications

Inputs: 8 single-ended, non-isolated. Input range: 0-20 mA. Voltage rating: 19.2 to 31.2 Volts DC. Functional data range: >23 V at 0 mA, >17 V at 22 mA. External DC supply current: 295 mA at 24 V DC. FlexBus current: 5 V DC @ 80 mA, 24 V DC @ 190 mA. Absolute accuracy: 0.1% full scale at 20 °C. Accuracy drift: 0.05% full scale over 0-55 °C. Step response to 99%: 80 ms. Isolation: 50 V continuous. Max power dissipation: 3.9 W at 31.2 V DC. Thermal dissipation: 13.5 BTU/hr. Operating temp: -20 to 55 °C. Non-operating temp: -40 to 85 °C. Vibration: 2 g at 10-500 Hz. Shock: 15 g. Indicators: 8 red fault, 8 yellow channel, 1 green power.

Installation & Maintenance Guide

Mount the module on a DIN rail. Use terminal base 1794-TB3G or 1794-TB3GS. Wire the field signals to the base. Connect the communication adapter. The module needs no switches or jumpers. Set the data format in software. Check the fault indicators for alarms. Keep the module free from dust. Use a dry cloth for cleaning. Do not touch the circuit board. Follow the Flex I/O manual for wiring diagrams. We ship via FedEx, UPS, or DHL for fast delivery.

Packing List

Your order includes one 1794-IE8H module. It also includes a quick start guide. The module is packed in anti-static foam. Ensure the box is intact upon receipt. Contact us if any item is missing.