GM International D1072D 2-Channel Temperature Converter

GM International D1072D 2-Channel Temperature Converter

The GM International D1072D is a compact, dual channel DIN rail mounted temperature signal converter and galvanic isolator for interfacing low level DC signals from hazardous area sensors such as thermocouples, RTDs, millivolts or transmitting potentiometers to safe area control systems. Based on an innovative microprocessor driven design, it offers 3-port galvanic isolation (Input / Output / Supply) to suppress ground loops, prevent control loops from high voltage transients and assure absolute measurement integrity in demanding maritime and industrial automation settings.

The D1072D includes software configurable configuration profiles (via PPC1090 pocket configurator or SWC1090 software) and comprehensive mathematical processing capabilities including signal duplication, addition, subtraction and high/low selection on its dual channels.

Model Details

• Brand Name: GM International
• Product Category: Intrinsically Safe Temperature Transducers / Signal Isolators
• Manufacturer Part Number (MPN): D1072D
• Condition Availability: New – Open Box

Technical Specifications: D1072D

Input/Output Ratings & Terminal Allocations

• Supply Terminals: Powered via terminals (e.g., Pins 13, 14 or standard Power Bus configuration depending on backplane setup; 10–30 Vdc).

Channel 1 Field Inputs (Hazardous Area):

• • RTD / Potentiometer: Terminals configured for Source, Sense, and Return lines (Supports programmable line resistance compensation for 2, 3, and 4-wire configurations)
  • Thermocouple / mV: Connected with automatic or fixed Cold Junction Compensation (CJC)

• Channel 2 Field Inputs (Hazardous Area): Isolated duplicate set for dual-sensor handling or math-block pairings.
• Safe Area Outputs: Dedicated analogue current (0/4–20 mA source) or voltage loops mapped via software configuration parameters.

Compatible Equipment Models

• Configuration Handheld/Adapters: GM International PPC1090 Pocket Portable Configurator, PPC1092 Serial Adapter, SWC1090 Software.
• Associated Power Enclosures / Bus Systems: PPC1090 / PPC1092 accessories, standard DIN-rail power bus connectors.
• Part Number Cross-References: Direct functional alternative/upgrade path for legacy single-channel setups (using D1072S where space allows) or multi-brand intrinsic safety barriers requiring SIL2 temperature translation.

Key Features

1. High-Density Dual Channel Design: Processes two independent sensor inputs within a narrow 22.5 mm enclosure housing footprint, optimizing cabinet space.
2. Versatile Math Functions: Integrated software logic supports signal duplication, addition, subtraction, and high/low channel selection.
3. Complete 3-Port Galvanic Isolation: Eliminates ground-loop interference across power, field sensors, and control outputs.
4. Advanced Sensor Diagnostics: Built-in sensor burnout detection with distinct LED indicators for power state and fault alerts.
5. Completely Jump-less Configuration: Fully software-programmable via pocket configurator or serial interface without physical hardware switches.

Applications

• Marine engine exhaust gas temperature monitoring and turbocharger inlet/outlet tracking.
• Petrochemical refinery distillation column temperature control loops.
• Offshore oil and gas production skid safety instrumented systems (SIS).
• Pharmaceutical bioreactor precision thermal tracking in hazardous zones.
• Power generation turbine bearing temperature signal isolation.

Engineer Expert’s Guide

• Shield Grounding Best Practices: When mounting the D1072D inside engine room automation panels, always terminate the hazardous area signal cable shields strictly at the safe area designated earth bar, ensuring you avoid ground loops across marine hull potentials.
• RTD Line Compensation Check: If utilizing 2-wire RTDs for secondary auxiliary systems, make sure to execute the software-based line resistance balancing via the PPC1090 configurator during commissioning to cancel out line-loss errors caused by long cable runs through ship cable trays.
• Thermal Spacing in Dense Racks: Because the module packs two channels into a slender 22.5 mm width with a power dissipation profile of about 1.5W leave adequate vertical breathing space on high-density DIN rails to optimize convection cooling in tropical engine control rooms.

Frequently Asked Questions

Can the GM International D1072D accept mixed sensor types on its two channels?

Yes, the D1072D is completely independent per channel, allowing you to configure Channel 1 for a Pt100 RTD and Channel 2 for a Type K thermocouple, mapped programmatically through the configuration software.

Is physical jumper reconfiguration required to change output from 4-20 mA to voltage?

No. The D1072D features zero internal jumpers or mechanical dip switches. All output scaling, range selections, and transfer characteristics are handled via software configuration tools

What is the primary advantage of the duplication function?

The duplicator function enables a single hazardous area temperature sensor input to be safely split into two independent, galvanically isolated safe-area outputs, feeding both a local indicator display and a centralized Distributed Control System (DCS) simultaneously without signal degradation.

Is this unit certified for marine bridge and engine room installations?

Yes, its robust EMC build quality, compliance with international safety directives, and high-density isolation make it ideal for marine classification society-regulated automation layouts