GE IC693PWR331C
GE IC693PWR331C - Image 2

GE IC693PWR331C

  • Product Introduction: This is a specialized 5VDC power supply module for the GE Fanuc Series 90-30 PLC platform. Unlike the 25VDC bus power modules (PWR322), the PWR331C provides a clean, regulated 5VDC output specifically designed to power the CPU, memory modules, and communication cards that require 5V logic power. The “C” suffix indicates a specific variant, often related to connector type or current capacity. This module is essential in systems where the CPU and backplane require separate 5V power in addition to the 25V bus power. It ensures that the processor and its associated memory have a stable, low-noise power source, which is critical for reliable program execution and data retention.
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Category: SKU: GE IC693PWR331C

Description

GE IC693PWR331C

  • Technical Specifications:
    • Output Voltage: 5VDC nominal (±2% regulation)
    • Output Current: 3A maximum (15W total power)
    • Input Voltage: 120VAC or 240VAC (selectable)
    • Input Frequency: 47-63Hz
    • Voltage Regulation: ±2% over full load
    • Ripple and Noise: <50mV p-p
    • Isolation: 1500V RMS between AC input and DC output
    • Protection: Overcurrent, overvoltage, short circuit
    • Operating Temperature: 0°C to 60°C
    • Dimensions: IC693 standard form factor
    • Weight: ~0.4 kg
  • Functional Features:
    • Dedicated 5V Logic Power: Powers CPU, memory, and communication modules requiring 5V
    • Low Noise Output: <50mV ripple ensures stable CPU operation
    • Separate from 25V Bus: Works alongside PWR322/PWR322E to provide dual-rail power
    • Backplane Delivery: 5V is delivered via backplane connector to CPU/memory slots
    • Power Good Monitoring: LED indicates when 5V is within spec
    • Compact Design: Fits in standard IC693 slot
  • Application Scenarios:
    • CPU power supply in 90-30 PLC racks with high-speed processors
    • Memory-intensive applications requiring stable 5V for RAM retention
    • Communication-heavy systems (Ethernet, Serial) needing clean 5V
    • Redundant CPU configurations where both CPUs need independent 5V
    • Legacy 90-30 systems upgraded with newer CPUs requiring 5V
  • Performance Parameters:
    • Output Ripple: <50mV p-p (very clean for logic power)
    • Transient Response: <5ms from 0 to 3A load step
    • Line Regulation: ±0.5% for 120VAC to 240VAC change
    • Load Regulation: ±1% from 0 to 3A
    • Efficiency: ~60% at full load
    • MTBF: >80,000 hours
  • Material Composition:
    • Housing: UL94 V-0 polycarbonate/ABS
    • PCB: 4-layer FR-4, conformal coated
    • Regulator IC: High-precision LDO or switching regulator with low dropout
    • Output Capacitors: Low-ESR solid polymer capacitors for minimal ripple
    • Connectors: Gold-plated backplane edge connector
  • Structural Features:
    • Standard IC693 module size
    • Power Good LED (green) on front panel
    • Fault LED (red) on front panel
    • AC input terminal block
    • DIN-rail mountable
  • Working Principle:
    • AC mains is rectified and filtered, then fed into a high-frequency switching regulator. The regulator uses pulse-width modulation (PWM) to maintain a constant 5VDC output. A precision voltage reference (typically 1.25V bandgap) is compared with a divided sample of the 5V output. The error signal drives the PWM controller to adjust the switch duty cycle. The 5V is delivered to the backplane bus, powering the CPU and memory slots directly. A separate power good comparator monitors the 5V rail and disables the CPU if voltage drops below 4.75V.
  • Installation Requirements:
    • Install in IC693 or IC695 chassis alongside a PWR322 module
    • Connect AC mains to input terminal
    • Ensure both 25V (PWR322) and 5V (PWR331C) are present before inserting CPU
    • Do not exceed 3A total on the 5V rail
    • Keep away from high-heat modules
  • Usage Precautions:
    • This module is required for CPUs that need 5V — do not omit it
    • Do not connect 5V output to 25V bus slots — they are separate rails
    • Verify 5V Power Good LED is on before inserting CPU
    • If CPU fails to start, check both 25V and 5V rails
    • Do not hot-swap without proper sequencing — 5V must come up before CPU

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