FUJI EP Series Modules: EP-3429-C6-Z2

Technical Dossier

Product Details And Specifications

Fuji Electric EP Series: Comprehensive Module Range and Technical Overview

The Fuji Electric EP Series represents a mature, field-proven platform deployed across global heavy industry sectors including petrochemical complexes, nuclear auxiliary systems, steel rolling mills, and offshore refinery installations. The EP Series drive and control modules — including the EP-3429-C6-Z2 brake module — are embedded in critical motion control infrastructure where long service intervals and backward compatibility are non-negotiable engineering requirements. Installed base spans facilities in Japan, Southeast Asia, the Middle East, and Europe, with many sites operating EP Series hardware beyond its original design lifecycle due to the prohibitive cost of full system replacement.

The Evolution of EP Series Architecture

The Fuji Electric EP Series emerged from the FRENIC drive platform lineage, inheriting the modular backplane architecture that Fuji standardized across its industrial automation product families in the late 1980s and through the 1990s. Early EP Series modules used parallel bus communication with proprietary Fuji backplane connectors, limiting interoperability with third-party control systems. Mid-generation revisions introduced optically isolated I/O interfaces and improved EMI shielding to meet IEC 61800-3 Category C3 requirements for variable-speed drive environments.

The C6 sub-designation within the EP-3429 family indicates a sixth-generation control board revision, incorporating improved IGBT gate drive circuitry and thermal protection logic compared to earlier C2 and C4 variants. The Z2 suffix denotes a zinc-plated chassis variant optimized for high-humidity industrial environments. Compatibility between C-series revisions is partial: C6 modules are electrically compatible with C4 backplanes but require firmware alignment. C2 modules are not hot-swap compatible with C6 slots without backplane adapter kits.

As the EP Series has entered its end-of-life phase with Fuji Electric's transition to the FRENIC-Ace and FRENIC-MEGA platforms, procurement of EP Series spares now relies primarily on authorized aftermarket distributors and certified refurbishment channels.

EP Series Full Catalog & Functionalities (SKU List)

Brake & Chopper Modules

• EP-3429-C6-Z2: Dynamic brake chopper module, C6 revision, zinc-plated chassis, 400V class
• EP-3429-C4-Z1: Dynamic brake chopper module, C4 revision, standard chassis, 400V class
• EP-3429-C2: Early-generation brake chopper, parallel bus interface, 380V nominal
• EP-3430-C6: High-capacity brake resistor interface module, 55kW–110kW drives

CPU & Control Modules

• EP-3100-C6: Main CPU module, dual-core DSP, FRENIC EP firmware v6.x compatible
• EP-3101-C4: CPU module, single-core, legacy firmware, 32-bit processing
• EP-3102-C6-Z2: Redundant CPU module, hot-standby capable, zinc-plated enclosure
• EP-3105-C6: Application CPU with onboard PID loop controller, 4 independent channels

Digital Input (DI) Modules

• EP-3210-C6: 16-channel DI module, 24VDC sink/source, optically isolated
• EP-3211-C6-Z2: 32-channel DI module, high-density, zinc-plated, IEC 61131-2 Type 1/3
• EP-3212-C4: 16-channel DI module, C4 revision, 120VAC input compatible

Analog Input (AI) Modules

• EP-3310-C6: 8-channel AI module, 4–20mA / 0–10V selectable, 16-bit resolution
• EP-3311-C6-Z2: 16-channel AI module, differential input, high-noise-rejection, zinc chassis
• EP-3312-C4: 4-channel AI module, thermocouple input, J/K/T/E type

Communication & Network Adapters

• EP-3510-C6: PROFIBUS-DP adapter module, slave mode, 12Mbps max
• EP-3511-C6: DeviceNet adapter, Group 2 Only server, 500kbps
• EP-3512-C6-Z2: Modbus RTU/TCP gateway module, dual-port Ethernet, zinc chassis

Power Supply Modules

• EP-3600-C6: 24VDC backplane power supply, 10A output, redundancy-capable
• EP-3601-C4: 24VDC power module, 5A, single-rail, non-redundant

Sourcing Hard-to-Find & Obsolete EP Series Parts

Fuji Electric officially discontinued active production of the EP Series control modules, with end-of-life notices issued progressively from 2015 onward. However, the installed base remains substantial, and facilities operating EP Series hardware face a defined procurement challenge: OEM channels no longer stock these modules, and system replacement projects carry capital expenditure timelines measured in years, not months.

DriveKNMS maintains a dedicated inventory program for EP Series lifecycle extension. This includes stocked units of high-demand modules such as the EP-3429-C6-Z2, EP-3100-C6, and EP-3210-C6, sourced through verified industrial surplus channels and decommissioned equipment recovery. All units undergo condition grading prior to listing. For modules not in current stock, DriveKNMS operates a global sourcing network with typical lead times of 5–15 business days for confirmed availability.

Customers requiring long-term maintenance agreements for EP Series infrastructure can contact DriveKNMS to discuss annual supply contracts covering critical spare modules, with priority allocation and price-lock provisions.

Quality Control for the EP Series Range

EP Series modules present specific test challenges due to their proprietary backplane bus architecture and multi-layer PCB construction. DriveKNMS applies a structured verification protocol for all EP Series units processed through its facility:

• Visual inspection: Component-level examination for capacitor bulge, PCB delamination, solder joint fatigue, and connector pin corrosion — common failure modes in modules recovered from high-temperature environments.
• Backplane bus continuity test: All edge connector pins verified against Fuji EP Series backplane pinout specifications. Brake modules such as the EP-3429-C6-Z2 are tested for IGBT gate signal integrity and chopper switching response at rated voltage.
• Functional load test: CPU and I/O modules are powered on a compatible EP Series test rack and exercised through standard diagnostic routines. AI modules are calibrated against traceable reference signals. DI modules are verified for threshold response across the full input voltage range.
• Communication adapter validation: Network modules are tested for protocol handshake, data throughput, and error frame rate on live fieldbus test segments.
• Thermal cycling: Modules flagged for refurbishment undergo 10-cycle thermal stress testing (−10°C to +70°C) to identify latent component failures before shipment.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.