GE 8421-CC-PS

The GE 8421-CC-PS is a power supply module under the General Electric (GE) Bently Nevada 3500 Series, specifically designed for industrial machinery protection systems. It is suitable for monitoring and controlling critical equipment such as gas turbines, steam turbines, and compressors. This module provides stable and isolated DC power to the Bently Nevada 3500 Rack, ensuring the reliable operation of monitoring modules for vibration, temperature, displacement, and more. It serves as a core guarantee for the high availability of the 3500 system.

Product Specifications

Product Model: 8421-CC-PS
Manufacturer: General Electric (GE) / Bently Nevada
Product Type: Power Supply Module
Input Voltage: 120/240V AC (±10%), 50/60Hz (switchable)
Output Voltage: +5V DC, ±15V DC (multiple isolated outputs)
Output Power: 60W (total continuous power)
Load Regulation: ±1% (full load to no load)
Isolation Voltage: 1500V AC (input to output)
Protection Functions: Overcurrent protection (self-recovering), overvoltage protection (latching)
Operating Temperature Range: -30°C to +65°C (-22°F to +149°F)
Protection Class: IP20 (must be installed in a control cabinet)
Installation Method: Insert into the 3500 Rack, occupying 1 slot
Status Indication: LED displays input/output power status and faults
Certification Standards: UL 508, CSA C22.2 No. 14, IEC 61010-1

GE 8421-CC-PS

Structure and Composition

The 8421-CC-PS adopts a modular industrial design, with main components including:

Input Filter Circuit: EMI filter to suppress power grid surges and high-frequency noise.
Rectification and PWM Control: High-frequency switching topology (e.g., flyback type) to improve conversion efficiency (≥85%).
Multiple Output Isolation: Independent transformer windings to generate +5V (for digital circuits) and ±15V (for analog circuits) power supplies.
Monitoring and Protection Circuit: Voltage/current sampling chips to feed back status to the 3500 Frame Interface Module (e.g., 3500/15) in real time.
Heat Dissipation Management: Aluminum substrate + thermal grease, dissipating heat through the rack backplane.
Connectors: Backplane interface for power supply and status signal transmission.

Key Features and Advantages

High-Reliability Power Output
- Multiple isolated outputs to avoid mutual interference between digital and analog circuits.
- ±1% load regulation to ensure voltage stability (even in case of sudden load changes).
Intelligent Monitoring and Protection
- Overcurrent protection (self-recovering) and overvoltage protection (latching, manual reset required).
- Real-time fault reporting (e.g., +5V failure) via LEDs and backplane signals.
Seamless 3500 System Integration
- Natively compatible with the Bently Nevada 3500 Rack (e.g., 3500/15 Frame Interface Module), supporting plug-and-play.
- Hot-swap support (when allowed by the system), eliminating the need for shutdown during maintenance.
Industrial-Grade Durability
- Wide operating temperature range of -30°C to +65°C, adapting to the environment of gas turbine control cabinets.
- Compliance with the UL 508 industrial power supply standard.

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