Part number 3A98764G02 is original Westinghouse WDPF DCS outdoor field duplex multimode fiber optic cable, yellow outer sheath design, matching cabinet indoor orange jumper 3A98763G series to complete Westnet fieldbus optical networking between on-site remote I/O cabinet and central control room DPU workstation. This field optical cable is customized for cross-cabinet and inter-room wiring inside power plant or petrochemical plant, designed to withstand relatively harsh on-site ambient conditions compared with indoor fiber patch cords. Original Emerson has permanently stopped new factory production; available market resources are tested refurbished finished cables and genuine dismantled spare parts for field maintenance and system modification replacement of thermal power and petrochemical DCS projects.

The cable is constructed with standard industrial 62.5/125μm multimode fiber, nominal operating wavelength at 850nm, maximum reliable transmission distance up to 2000 meters for Westnet bus signal transmission. The optical channel works passively without auxiliary power supply, fully compliant with proprietary WDPF Westnet optical communication protocol. Each factory-terminated ST connector features insertion loss no higher than 0.8dB and return loss above 25dB to guarantee stable continuous bus data exchange under long-term field running status. The fiber core is equipped with built-in anti-transient surge protection structure to reduce risks of signal abnormality caused by power grid fluctuation and field lightning induced voltage spike.

High-strength aramid fiber serves as tensile bearing layer surrounding fiber core to improve pull resistance and bending resistance against construction pulling and equipment vibration. Outer layer adopts thickened yellow oil-resistant, flame-retardant and anti-ultraviolet modified PVC jacket which is superior to indoor orange cable sheath for outdoor and inter-cabinet routing. All finished cables are produced with fixed factory preset length to fit standard plant wiring layout without random field cutting. Continuous operating ambient temperature ranges from 0℃ to +55℃ for installed in cabinet trench and cable channel; spare storage temperature covers from -40℃ to +85℃, applicable working relative humidity is between 5% and 95% under non-condensing environment. The whole product meets UL flame retardant certification and CE industrial communication EMC compliance standards.

Compared with early G01 revision, G02 optimizes outer sheath material formula for better anti-aging and crack resistance under long-term sunlight and damp field environment. Both ends adopt reinforced overmolded ST connector sealing structure to prevent rainwater, dust and corrosive industrial gas penetrating into fiber end face and causing increased transmission attenuation. Internal fiber fixed wrapping process is revised to reduce fiber shifting damage from long-distance transportation and on-site wiring bending. Distinct yellow outer jacket forms obvious color differentiation with indoor orange 3A98763G fiber cord, effectively avoiding wrong wiring during construction and maintenance.

This field fiber cable establishes optically isolated Westnet bus data link between field remote I/O cabinets and central control room DPU controller cabinet, cutting off strong electromagnetic interference generated by large-capacity motors, frequency converters and high-voltage power equipment on site so as to prevent system communication drop-off and abnormal offline faults. It realizes bidirectional transmission of field analog/digital acquisition data, control commands and system fault alarm messages across different plant areas for WDPF distributed control system.

It is the dedicated supporting field optical spare part for Westinghouse classic WDPF DCS widely deployed in coal-fired power plant, combined heat and power station and petrochemical refining factory control system reconstruction and daily maintenance. Available supply includes quality guaranteed refurbished cables and inspected original used spare pieces; standard delivery cycle is two to four weeks, expedited supply can be arranged upon customer request, global delivery via DHL, UPS and FedEx international express is supported.