IS420EPDMG3A | GE Electric dual-redundant power supply module
Product Function
The IS420EPDMG3A is a dual-redundant power supply module for GE’s Mark VIe turbine control systems. It delivers conditioned DC power (5V, ±15V) to I/O modules and controllers within the rack, featuring hot-swappable redundancy, real-time fault diagnostics, and voltage monitoring to ensure uninterrupted critical operations.
Product Specifications & Parameters
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Category
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Specification
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Manufacturer
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GE Digital
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Series
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Mark VIe Turbine Control System
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Type
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Power Supply / Distribution Module
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Form Factor
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VME-9U (mounts in IS200VCCCH1D chassis)
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Input Voltage
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24V DC nominal (18–36V DC range)
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Output Voltages
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+5V DC (12A max), +15V DC (1A), -15V DC (1A)
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Redundancy
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Dual-module N+1 (supports hot-swap replacement)
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Efficiency
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>85% @ full load
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Ripple Noise
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<50mV p-p (±15V), <100mV p-p (+5V)
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Overload Protection
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Auto-reset for +5V; latch-off for ±15V
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Operating Temp.
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-40°C to +70°C
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Cooling
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Convection / forced air (via system fans)
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MTBF
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>250,000 hours @ 40°C
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Certifications
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UL 508, CE, IEC 61000-6-2/4, RoHS, ATEX/IECEx Zone 2
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Connection
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Backplane-powered; field input via removable 4-pin terminal
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Series Information
Part of GE’s Mark VIe Power Distribution Series – interoperable with:
- Controllers: IS420UCSxH1x
- Chassis: IS200VCCCH1D, IS200VCRCH1B
- Companion Modules:
- IS420PDIAH1A (Analog Input)
- IS420ESWBH3A (Discrete I/O)
- IS420YDIAS1A (RTD/Thermocouple Input)
Key Features
- Redundant Operation: Automatic failover if primary PSU fails.
- Live Insertion: Hot-swap without rack shutdown.
- Voltage Monitoring: Real-time ±2% accuracy via ToolboxST™.
- Diagnostic LEDs: Per-module status (green=OK, red=fault, amber=standby).
- Surge Protection: 40V DC transient withstand (IEC 61000-4-5).
- Load Balancing: Dynamic current sharing between modules.
Role & Purpose
- Power Conditioning: Filters noise for sensitive control electronics.
- System Reliability: Prevents downtime via redundancy.
- Voltage Stabilization: Ensures ±1% regulation under load swings.
- Fault Reporting: Alerts for undervoltage/overvoltage via controller.
Applications & Use Cases
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Industry
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Application
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Power Plants
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Gas/steam turbine control cabinets
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Compressor Stations
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Critical oil & gas pipeline monitoring systems
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Marine Propulsion
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Shipboard turbine control racks
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Industrial Drives
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High-power motor control centers (MCCs)
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Hydroelectric
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Dam gate control systems
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Cogeneration
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Combined heat/power (CHP) facility controls
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Technical Notes
- Wiring:
- Field Input: TB1 (24V+: pins 1/2, 24V-: pins 3/4)
- Shield: Chassis ground screw (front panel)
- Status Indicators:
- MOD OK (Green): Normal operation
- PWR FLT (Red): Overload/short circuit
- STBY (Amber): Redundant module in standby
- Redundancy Rules:
- Primary module powers rack; secondary activates if primary voltage drops 10%.
- Load imbalance >5% triggers alarm.
- Safety:
- Isolation: 1500V AC input-to-output
- Not for SIL applications (non-safety-rated).
Installation Criticals:
- Max. 2 modules per VME chassis (redundant pair).
- Input wiring: 14–16 AWG twisted pair (max 30m from source).
- Derating: Reduce load by 2.5%/°C above 50°C ambient.
Typical Power Distribution
Mark VIe Rack Configuration:
Slot 1 : IS420EPDMG3A (Primary PSU)
Slot 2 : IS420EPDMG3A (Redundant PSU)
Slot 3 : IS420UCSAH1A (Controller)
Slots 4-10: I/O Modules (e.g., IS420PDIAH1A, IS420ESWBH3A) 
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