3A98720G18
Part No.3A98720G18 is original dedicated green external outgoing cable for Westinghouse WDPF WEStation Sparc VME workstation chassis, matching the same series SCSI wiring harness including 3A98688G02/G03/G04, exclusively configured for front panel external signal extension of SUN Sparc based operator station and engineering station. Differentiated from black SCSI storage cable series, this product adopts customized green outer sheath for easy field wiring identification, mainly used to lead out serial communication, auxiliary monitoring signal and peripheral equipment connecting circuit from VME chassis front cavity to cabinet external terminals, realizing docking with field printer, trackball, external debugging terminal and on-site secondary monitoring accessory. It is original factory fixed-length finished cable designed according to standard WEStation cabinet layout, Emerson-Westinghouse has terminated new original production permanently, current market supply mainly consists of tested dismantled original spare parts and qualified refurbished spare for thermal power, petrochemical DCS routine overhaul replacement.
Description
Product Introduction
Part No.3A98720G18 is original dedicated green external outgoing cable for Westinghouse WDPF WEStation Sparc VME workstation chassis, matching the same series SCSI wiring harness including 3A98688G02/G03/G04, exclusively configured for front panel external signal extension of SUN Sparc based operator station and engineering station. Differentiated from black SCSI storage cable series, this product adopts customized green outer sheath for easy field wiring identification, mainly used to lead out serial communication, auxiliary monitoring signal and peripheral equipment connecting circuit from VME chassis front cavity to cabinet external terminals, realizing docking with field printer, trackball, external debugging terminal and on-site secondary monitoring accessory. It is original factory fixed-length finished cable designed according to standard WEStation cabinet layout, Emerson-Westinghouse has terminated new original production permanently, current market supply mainly consists of tested dismantled original spare parts and qualified refurbished spare for thermal power, petrochemical DCS routine overhaul replacement.
Technical Specification
Electrical Parameters
The cable integrates multi-core composite wire grouping including serial signal core and low-voltage auxiliary power core, rated signal working voltage DC0~5V, auxiliary power withstand voltage maximum 12VDC, serial communication supports standard RS232 asynchronous transmission with maximum baud rate up to 115200bps, matching built-in serial port chip of Sparc mainboard inside VME rack. Overall structure adopts single-layer aluminum foil full wrap shielding plus braided copper net auxiliary shielding design, contact electrostatic protection reaches ±12kV level, effectively restrain cabinet internal frequency converter and power loop electromagnetic interference to avoid communication dropout and signal drift during long-time continuous running.
Mechanical & Environmental Features
Core conductor adopts high-purity tinned copper stranded wire, insulation layer is high-temperature resistant crosslinked PE material, outer jacket uses distinctive oil-proof flame retardant green modified PVC which is wear-resistant and anti-aging, convenient for field classification arrangement to distinguish with conventional black SCSI cables. Total cable length complies with original factory fixed dimension for standard VME cabinet front outgoing installation without random cutting. Continuous operating ambient temperature ranges from 0℃ to +55℃ inside closed control cabinet, spare part storage temperature is -40℃~+85℃, applicable working humidity 5%~95%RH under non-condensing environment, passes CE industrial wiring safety certification and relevant UL flame retardant certification standard.
Structural & Application Advantages
Custom green outer sheath realizes quick on-site line checking and troubleshooting to reduce wrong wiring risk during maintenance; connector terminals adopt crimped and overmolded integrated forming process with good sealing performance to block cabinet dust and damp gas from corroding internal contacts; internal core wire is fixed by positioning wrapping to avoid wire breakage caused by long-term cabinet equipment vibration; integrated signal and power hybrid wiring reduces independent wiring quantity inside cabinet and optimizes internal wiring space layout of VME workstation.
Core Product Functions
Firstly, realize external extension of Sparc mainboard serial communication interface inside WEStation VME chassis, complete data transmission between workstation and external field printer, debugging handheld terminal and peripheral auxiliary monitoring equipment; secondly, transmit low-voltage auxiliary power supply from internal backplane to front external socket for powering peripheral small-sized accessory; thirdly, transmit partial cabinet status monitoring signal outward to realize real-time state collection of front panel peripheral accessories via external terminal.
Application & Supply Description
Specially matched spare cable for Westinghouse WDPF distributed control system operator station, engineering station and historical data server VME cabinet, widely applied in overhaul and spare replacement of coal-fired power plant, cogeneration unit and petrochemical refining production line DCS system. Available products include inspected original dismantled spare parts and warranty-attached refurbished finished cables; standard delivery cycle is 2~4 weeks, urgent expedited supply is acceptable, global delivery can be realized via DHL, UPS or Fedex international express.
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