1794-IE8H 8-Channel HART Module Allen-Bradley

Allen-Bradley 1794-IE8H Flex I/O HART Analog Input Module

HART Communication and Advanced Features

• HART Protocol Support: The 1794-IE8H fully supports the Highway Addressable Remote Transducer (HART) protocol. This open protocol enables digital communication over traditional 4-20 mA analog instrumentation loops, allowing access to additional device data and operational status.
• Intelligent Diagnostics: The built-in local microprocessor provides advanced capabilities including remote transmitter alarms, lead breakage detection, and overrange/underrange alarms. Users can independently program data ranges in channel groups for flexible configuration.
• Status Indicators: The module features comprehensive visual feedback with 8 red fault indicators, 8 yellow channel indicators, and 1 green power indicator. These LEDs help operators quickly identify channel status and system health at a glance.

Technical Specifications and Performance

• Input Channels: The 1794-IE8H offers eight (8) single-ended, non-isolated inputs that support 0-20 mA and 4-20 mA analog signal ranges. The default input range is 0 to 20 mA for immediate deployment.
• High Resolution: This module delivers exceptional precision with 16-bit resolution for unipolar operation and 15-bit resolution for bipolar configuration. This high resolution ensures accurate monitoring of critical process variables.
• Accuracy: It maintains an absolute accuracy of 0.1% of full scale at 20 °C (68 °F). The accuracy drift with temperature remains within 0.05% of full scale across the entire 0 °C to 55 °C (32 to 131 °F) operating range.
• Response Time: The step response to reach 99% of the final value is 80 milliseconds. This rapid response allows for timely detection of process changes and alarms.
• Configurable Features: Users can easily configure the input filter cutoff frequency, fault mode, data format, high/low error levels, and remote transmitter error correction. All configurations are software-selectable without physical switches or jumpers.
• Power Requirements: The module draws 80 mA from the 5V DC FlexBus and 190 mA from the 24V DC external supply. It requires an external DC supply voltage range of 19.0 to 31.2V DC (including 5% AC ripple) with a nominal 24V DC.
• Functional Data Range: The 1794-IE8H maintains a functional data range greater than 23V at 0 mA and greater than 17V at 22 mA, ensuring reliable operation across the full signal spectrum.
• Environmental Specifications: It operates in temperatures from -20 to 55 °C (-4 to 131 °F) and withstands vibration of 2g at 10 to 500 Hz. The module handles operating and non-operating shock of 15g.
• Power Dissipation: Maximum power dissipation is 3.9W at 31.2V DC, with thermal dissipation of 13.5 BTU/hour under the same conditions.
• Isolation: While there is no isolation between individual channels, the module provides 50V continuous isolation voltage between the field side and system. It features basic insulation type routinely tested at 850V DC for 1 second.

Frequently Asked Questions (FAQ)

• Is the Allen-Bradley 1794-IE8H a genuine new product?
  Yes, we supply the 1794-IE8H as a brand new, original Allen-Bradley product in factory-sealed condition. We never provide used or counterfeit items.
• What terminal bases work with the 1794-IE8H module?
  The 1794-IE8H requires either the 1794-TB3G or 1794-TB3GS terminal base. These bases provide the necessary connections for HART communication and analog input wiring.
• Can I use this module without HART functionality?
  Yes, the 1794-IE8H functions as a standard analog input module when you do not need HART communication. It reads 0-20 mA and 4-20 mA signals with exceptional 16-bit resolution even without using the HART protocol.
• How do I configure the input filter and alarms?
  All configuration for the 1794-IE8H is software-selectable through your control system. You can program the input filter cutoff, fault mode, data format, and error levels without opening the panel or adjusting physical switches.
• What is the lead breakage detection feature?
  The 1794-IE8H continuously monitors field wiring integrity. If it detects a broken lead, it triggers an alarm through the red fault indicators and reports the condition to your control system for immediate operator attention.
• Do you have the 1794-IE8H in stock?
  Yes, we maintain inventory of the 1794-IE8H module. We typically process and ship orders within 5 business days using DHL, UPS, or FedEx based on your location and preference.
• What is your return policy?
  We offer a 30-day return window for the 1794-IE8H provided the item remains in its original, unused condition with all packaging intact.
• Does this module work with Profibus networks?
  Yes, the 1794-IE8H works with Profibus networks but requires the specific Profibus adapter with catalog number 1794-APBDV1 only. Other adapters may not support HART functionality with this module.

Contact Information Inquiries: sales@nex-auto.com , +86 153 9242 9628

Partner NexAuto Technology Limited : https://www.nex-auto.com/