3A98764G03
3A98764G03 is upgraded field duplex multimode fiber cable belonging to Westinghouse original WDPF DCS 3A98764 series, revised based on former G02 version with thick yellow outdoor dedicated outer jacket. It pairs with indoor orange patch cord 3A98763G series to build complete Westnet bus optical link between field remote I/O cabinets and central control DPU racks across workshop and plant areas. Designed for harsh on-site trench and overhead routing environment different from indoor short-distance fiber, this finished pre-terminated fiber assembly is originally customized for power and petrochemical DCS networking. Emerson has permanently ceased original new production; available market stock consists of fully function-tested refurbished cables and verified original pulled spare cables used for site maintenance and equipment replacement of thermal power and refining plants.
Description
1. Product Overview
3A98764G03 is upgraded field duplex multimode fiber cable belonging to Westinghouse original WDPF DCS 3A98764 series, revised based on former G02 version with thick yellow outdoor dedicated outer jacket. It pairs with indoor orange patch cord 3A98763G series to build complete Westnet bus optical link between field remote I/O cabinets and central control DPU racks across workshop and plant areas. Designed for harsh on-site trench and overhead routing environment different from indoor short-distance fiber, this finished pre-terminated fiber assembly is originally customized for power and petrochemical DCS networking. Emerson has permanently ceased original new production; available market stock consists of fully function-tested refurbished cables and verified original pulled spare cables used for site maintenance and equipment replacement of thermal power and refining plants.
2. Technical Specifications
2.1 Optical Parameter
Adopts standard industrial 62.5/125μm multimode fiber core, operating wavelength at 850nm matching proprietary WDPF Westnet bus communication specification, maximum effective transmission distance reaches 2000 meters for field bus signal. Optical transmission runs in passive status without extra power feed; pre-assembled ST connectors on both ends maintain insertion loss below 0.8dB and return loss higher than 25dB for stable long-term continuous data transmission. Built-in structure restrains transient surge interference induced by grid fluctuation and site lightning induction to avoid abnormal optical attenuation.
2.2 Mechanical & Environmental Parameter
High-strength aramid fiber surrounds fiber core as tensile reinforcement to improve pull resistance and anti-bending performance during field laying and long-term equipment vibration. The G03 model upgrades yellow outer sheath compound formulation compared with G02 for enhanced ultraviolet resistance, moisture resistance and anti-cracking property suitable for outdoor and cable trench layout. Each finished cable keeps factory fixed specified length according to standard plant wiring layout without random field cutting. Continuous working ambient temperature ranges from 0℃ to +55℃ under installed environment; spare storage temperature covers -40℃ to +85℃ with applicable relative humidity between 5% and 95% in non-condensing condition. The whole cable complies with UL flame retardant requirement and CE industrial EMC certification standards.
2.3 G03 Upgrade Advantages versus G02
Connector overmolded sealing structure is reinforced with extra anti-dust and moisture-proof rubber ring to prevent corrosive gas and trench damp from eroding fiber end face and raising signal loss. Internal fiber positioning wrapping technology is optimized to reduce core shifting damage caused by frequent bending and long-distance transportation. Outer jacket anti-ageing performance is improved to slow down material deterioration under long-term sunlight exposure and damp field environment. Consistent yellow appearance keeps obvious color separation with indoor orange 3A98763G patch cords to prevent misconnection during field wiring and maintenance work.
3. Core Function
Construct optically isolated Westnet fieldbus data channel between site remote I/O cabinet and central control room DPU cabinet, isolating strong electromagnetic interference from on-site large motors, frequency converters and high voltage equipment to avoid system communication interruption or offline failure. Realize bidirectional delivery of field collected analog/digital process data, master control instructions and equipment fault alarm information for WDPF distributed control system.
4. Application & Supply Information
Specially matching field optical spare part for classic Westinghouse WDPF DCS system applied in coal-fired power plant, cogeneration unit and petrochemical refinery control system overhaul and modification. Available goods include warranty-provided refurbished finished cables and inspected original dismantled spares; standard delivery lead time is two to four weeks, expedited order is available upon request, global shipment can be arranged via DHL, UPS and FedEx international courier.
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