Moore Industries HIMHART2AO24DC

Product Name HART Interface Module with 2 Analog Outputs

Product Description The HIMHART2AO24DC is a HART loop interface module from Moore Industries. It polls HART-enabled field instruments, extracts process variables and converts them into isolated 4–20 mA analog signals for integration with DCS, PLC and SCADA systems.

Category:
Description

Technical Specifications

  • Input: HART digital protocol (field instrument side)
  • Output: 2 independent channels of 4–20 mA analog with HART pass-through
  • Power supply: 24 V DC (4-wire operation)
  • Output accuracy: ±0.015% of full span (20 mA)
  • Output response time: <120 ms (10–90% step change)
  • Isolation: 500 Vrms channel-to-channel; 1000 Vrms between case, inputs, outputs and power
  • Maximum load resistance: 1100 ohms per output
  • Operating temperature: -40 °C to +85 °C
  • Enclosure rating: IP20
  • Dimensions: 22.5 × 99 × 114 mm
  • Weight: 100 g

Functional Features

  • Maps HART dynamic variables to configurable analog outputs
  • User-configurable fail-safe modes: fail high, fail low, hold last value, hold then fail
  • Full electrical isolation protects control systems from field side faults
  • Low output ripple for stable control signal transmission
  • Built-in transient voltage protection on all outputs
  • PC configurable via USB connection

Application Scenarios

  • Process control system DCS and PLC integration
  • HART field device signal conversion for legacy analog systems
  • Oil and gas production and refining automation
  • Chemical and petrochemical plant process monitoring
  • Power generation and water treatment control systems

Installation Requirements

  • Mount on standard DIN rail inside a control cabinet
  • Use shielded twisted-pair cable for all field signal wiring
  • Connect cable shield at the module end only to avoid ground loops
  • Observe correct polarity for 24 V DC power and output connections

Operating Notes

  • Do not exceed maximum load resistance on analog outputs
  • Select fail mode appropriate to process safety requirements
  • Perform periodic calibration checks to maintain output accuracy
  • Store configuration files for backup and replacement purposes
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