3A98688G04
Part number 3A98688G04 is the latest upgraded revision based on 3A98688G03, belonging to the exclusive front-panel SCSI connecting cable series for Westinghouse classic WDPF WEStation VME DCS cabinet, specially configured for original standard workstation rack layout. This cable works as the physical connecting medium between front-mounted built-in storage hard disk module and internal VME backplane main control board inside the cabinet, undertaking real-time transmission of DCS system configuration parameters, historical operation trend data, equipment fault alarm records, and low-voltage auxiliary power supply for front panel status indicator circuits. Compared with G02 and G03 predecessors, G04 optimizes internal conductor layout, connector full sealing treatment and outer sheath raw material formulation, greatly lifting resistance against high temperature ageing, mechanical vibration and corrosive dust inside industrial control cabinet, and is tailored for ultra-harsh on-site operating environment of thermal power, cogeneration and petrochemical DCS control system. Original OEM bulk production of this model has been permanently discontinued by Emerson-Westinghouse factory; available supply in market mainly covers factory-tested refurbished finished cables and disassembled original used spare parts for field equipment maintenance and replacement.
Description
Product Introduction
Part number 3A98688G04 is the latest upgraded revision based on 3A98688G03, belonging to the exclusive front-panel SCSI connecting cable series for Westinghouse classic WDPF WEStation VME DCS cabinet, specially configured for original standard workstation rack layout. This cable works as the physical connecting medium between front-mounted built-in storage hard disk module and internal VME backplane main control board inside the cabinet, undertaking real-time transmission of DCS system configuration parameters, historical operation trend data, equipment fault alarm records, and low-voltage auxiliary power supply for front panel status indicator circuits. Compared with G02 and G03 predecessors, G04 optimizes internal conductor layout, connector full sealing treatment and outer sheath raw material formulation, greatly lifting resistance against high temperature ageing, mechanical vibration and corrosive dust inside industrial control cabinet, and is tailored for ultra-harsh on-site operating environment of thermal power, cogeneration and petrochemical DCS control system. Original OEM bulk production of this model has been permanently discontinued by Emerson-Westinghouse factory; available supply in market mainly covers factory-tested refurbished finished cables and disassembled original used spare parts for field equipment maintenance and replacement.
Technical Specification
Electrical Performance Parameters
The product adopts industrial wide SCSI dual-lock anti-drop molded connector with fully encapsulated seal structure, standard signal working voltage ranges from DC 0V to DC 5V, with maximum instantaneous transient overvoltage withstand capacity no higher than 18V, matching original WEStation onboard storage module to realize rated synchronous SCSI transmission speed at 20MB/s. The whole cable applies double-layer shielding structure consisting of inner aluminum foil wrapping plus outer full dense braided copper mesh, achieving ±15kV contact ESD protection level and outstanding anti-electromagnetic interference capability against cabinet internal frequency converter harmonic interference and peripheral strong magnetic field signal disturbance, effectively avoiding signal distortion or data loss during long-term continuous operation.
Mechanical & Environmental Characteristics
Internal wiring adopts multi-group paired twisted high-purity tinned copper core wire, outer jacket uses newly upgraded flame-retardant, oil-proof and low-smoke modified special PVC material superior to G03 ordinary outer sheath, effectively slowing insulation aging under long-time high-temperature working condition. Cable overall length follows original factory fixed size matched with standard WEStation VME cabinet installation space without customized cutting. Rated continuous operating ambient temperature covers 0℃ to +60℃ inside closed control cabinet, storage temperature spans from -40℃ to +85℃ for spare part preservation, applicable working humidity scope is 5% to 95% relative humidity under non-condensing environment, and the whole product passes CE EMC industrial electromagnetic certification and UL industrial control wiring safety certification to meet global mainstream industrial access standards.
Core Upgrade Advantages against G03 Version
G04 upgrades connector tail end integral silicone sealing ring design on the basis of G03 sealed joint, blocking fine dust and humid corrosive gas inside cabinet from invading terminal crimping position and preventing long-term terminal oxidation and poor contact failure. Internal wire sorting technology is optimized with fixed limit wrapping to reduce wire mutual friction damage caused by long-period cabinet equipment running vibration. Core wire insulation layer material is upgraded with high heat-resistant compound to expand upper limit of sustainable working temperature, realizing stable running performance in poorly heat-dissipated closed cabinet space where G03 version cannot adapt steadily. Besides, partial wire diameter specification is moderately optimized to lower loop impedance and further promote the stability of low-speed auxiliary power transmission for indicator circuits.
Core Functional Description
First, build stable SCSI high-speed physical data channel between cabinet front storage unit and VME backplane master control board of WEStation engineering station, operator station and historical data server, ensuring bidirectional uploading and downloading of system configuration files, historical curve data and all-level equipment fault event logs to local hard disk storage medium. Second, provide stable small-power DC auxiliary power output for front panel storage running indicator and matching peripheral auxiliary circuit, guarantee normal status display of front hard disk module. Third, restrain stray signal interference generated in cabinet wiring space via full shielding design, improving overall system data storage reliability for WDPF distributed control system.
Application Range & Supply Instruction
This cable is dedicated original spare accessory for Westinghouse WDPF series DCS VME chassis, widely applied to daily maintenance, component replacement and system overhaul projects of coal-fired power plant, combined heat and power unit, oil refining and chemical production line distributed control system. Available supply includes qualified remanufactured tested goods and used original dismantled spare parts with formal quality warranty; standard maintenance cycle is 2 to 4 weeks and urgent rush maintenance service is optional upon customer requirement, global consignment can be arranged via DHL, UPS or Fedex international express delivery as requested.
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