YASKAWA F350587-1 Control Board

Technical Dossier

Product Details And Specifications

YASKAWA F350587 Series: Comprehensive Module Range and Technical Overview

The YASKAWA F350587 series control boards are core printed circuit board assemblies deployed within YASKAWA Varispeed-series AC variable frequency drives, including the VS-616G5, VS-616PC5, and related G-series platforms. These boards are installed across heavy industrial sectors including petrochemical refineries, nuclear auxiliary systems, offshore platforms, pulp and paper mills, and large-scale HVAC infrastructure. The F350587 series functions as the primary control interface layer, managing PWM signal generation, feedback processing, fault logic, and operator interface communication within the drive chassis. Due to the long operational lifecycles typical of process-critical installations—often 15 to 25 years—demand for F350587-series boards as maintenance spares remains active well beyond the original product's commercial availability window.

The Evolution of F350587 Architecture

The F350587 board lineage traces to YASKAWA's mid-generation Varispeed drive platforms introduced in the late 1990s and refined through the mid-2000s. Early revisions (suffix -1) established the baseline analog/digital hybrid control architecture using discrete gate driver logic and optocoupler isolation. Subsequent suffix revisions introduced incremental changes to component tolerances, EEPROM firmware storage, and EMC compliance adjustments to meet evolving IEC and CE directives. The board communicates with the drive's power stage via a dedicated internal bus, and compatibility is strictly revision-dependent—substituting a mismatched suffix revision can result in parameter initialization errors or gate timing faults. As YASKAWA transitioned its drive portfolio toward the A1000 and GA700 platforms, the F350587 series entered end-of-life status, with no direct OEM replacement offered. Facilities operating legacy G5/PC5 drives must source F350587 boards through authorized aftermarket channels or certified repair services to maintain uptime without full drive replacement.

F350587 Full Catalog & Functionalities (SKU List)

The following SKUs represent the documented F350587 control board range and associated interface cards used within the YASKAWA Varispeed G5 and PC5 drive families. Each entry reflects a distinct hardware revision or functional variant:

F350587-1: Primary control PCB for VS-616G5; baseline PWM and fault logic revision.
F350587-2: Revised component layout; updated EMC filtering vs. -1 suffix.
F350587-3: Enhanced thermal management; modified gate driver section.
F350587-4: EEPROM firmware update; parameter map revision for G5 v2 drives.
F350587-5: Conformal coating variant for high-humidity environments.
ETC615823-S1040: Operator interface card compatible with F350587 platform.
ETC615823-S1041: Revised operator card; updated display driver IC.
ETC615823-S1042: Extended temperature operator card variant.
ETC615823-S1050: Communication option card; RS-422/RS-485 interface.
ETC615823-S1060: DeviceNet communication option for G5 series.
ETC615823-S1070: PROFIBUS-DP communication option card.
ETC615823-S1080: Analog I/O expansion card for F350587 platform.
ETC615823-S1090: Digital I/O expansion; 8DI/8DO configuration.
ETC615823-S1100: Encoder feedback card; incremental encoder input.
ETC615823-S1110: Resolver feedback interface card for closed-loop operation.
ETC615823-S1120: PG speed control card; pulse generator input module.
ETC615823-S1130: Braking transistor gate driver board for G5 chassis.
ETC615823-S1140: Power supply board; 24VDC control rail for F350587 system.

Sourcing Hard-to-Find & Obsolete F350587 Parts

Quality Control for the F350587 Range

Each F350587 control board processed by DriveKNMS undergoes a structured inspection and functional test protocol prior to dispatch. Visual inspection covers solder joint integrity, capacitor condition (ESR measurement for electrolytic types), trace continuity, and component seating. Functional testing is performed using a drive chassis test fixture that replicates the G5 backplane bus environment, allowing verification of PWM output signals, fault relay operation, analog reference input response, and serial communication handshake with the operator interface card. Boards with conformal coating (suffix -5) are inspected under UV illumination for coating coverage integrity. All tested units are issued a test report documenting pass criteria and are shipped in ESD-safe packaging with desiccant. Units that fail functional test are either routed to component-level repair or classified as non-serviceable and withheld from sale.