Description
1. At-A-Glance Executive Brief
- Model: D1080D
- Brand: G.M. International
- Part Type: Dual Channel Intrinsically Safe Repeater Power Supply / Isolator
- Lifecycle Status: Active / Current Production Tier
- System Compatibility: Hazardous area instrumentation and safety PLC loops
- Core Protocol: 4-20 mA HART transparent signal transmission
2. Technical Introduction
Ground faults and hazardous area overvoltages can compromise sensitive control loops and trip safety instrumented systems across process plants.
The G.M. International D1080D operates as a dual-channel intrinsically safe repeater power supply designed to interface 2-wire 4-20 mA transmitters located in explosive atmospheres with safe-area control systems. It provides galvanic isolation between input, output, and power supply circuits while delivering transparent bidirectional digital communication for HART-enabled field devices.
- Best Suited For:
- Hazardous area petrochemical and refinery instrumentation loops
- Safety Instrumented Systems (SIS) requiring galvanic loop isolation
- Direct replacement in standard DIN-rail safety barrier cabinets
3. Core Technical Specifications
| Parameter | Value |
| Number of Channels | 2 independent channels |
| Input Signal | 4 to 20 mA from hazardous area field transmitters |
| Output Signal | 4 to 20 mA (sink or source) to safe-area control system |
| Supply Voltage | 24 V DC nominal (20 to 30 V DC range) |
| Galvanic Isolation | Full 3-port isolation (Input / Output / Supply) |
| Mounting Style | DIN-rail mount (compatible with standard EN 50022 enclosures) |
| Operating Temperature | -20 °C to +60 °C (-4 °F to +140 °F) |
4. Field Engineer’s Tech Notes
- Loop Power and Voltage Drop: Verify that the 24 V DC supply rail can maintain adequate voltage under maximum transmitter current draw. Insufficient supply voltage combined with barrier resistance will cause loop saturation and signal clipping below 20 mA span limits.
- HART Communication Impedance: Ensure the control system loop resistance meets minimum requirements (typically 250 ohms) to allow proper superposition of digital HART communication packets without attenuating the carrier signal.
5. Adaptive QA & Testing Protocol
Each unit undergoes precision signal simulation across both channels using calibrated 4-20 mA current sources to verify span linearity, isolation barrier breakdown thresholds, and repeater accuracy. Technicians validate dual-channel HART transparency, 24 V DC power regulation, and LED status indicator responsiveness under load. Complete test logs and verification videos are available upon request prior to dispatch.
6. Buyer’s FAQ
- What operational condition is this safety isolator supplied in?Inventory is maintained in factory-sealed New Surplus (NSFP) and thoroughly bench-tested refurbished conditions, backed by a standard operational warranty.
- What is the typical shipping lead time for urgent site requirements?Standard stock orders dispatch within 1 to 2 business days via global priority couriers to minimize process downtime during unexpected safety system faults.
- Is this exact model directly interchangeable with older G.M. International revisions?Yes, the D1080D maintains form-factor and terminal pinout compatibility with standard D-series DIN-rail enclosures, ensuring a drop-in replacement fit.
