Description
GE WESCOM D200 VME 0517-01230D
Model: WESCOM D200 VME | Part Number: 0517-01230D
Product Introduction: A 6U VME bus master backplane/chassis motherboard of GE WESCOM D200 series. It serves as the core foundation for D20ME/D200 SCADA substation monitoring & power telecontrol systems, accommodating CPU boards, analog input modules, digital I/O cards and communication VME plug-in modules. It is an essential spare part for RTU equipment in power grid substations, auxiliary control of power plants and technical renovation of legacy GE D20 systems.
Brand: GE (Formerly WESCOM, under GE Power Automation Division) | Origin: USAProduct Type: 6U VME Eurocard chassis backplane for standard 19-inch rack mounting.
Compatibility: D20ME-II master CPU card, full-series D20 AI/DI/DO I/O modules, DSX1 communication card, T1 digital carrier board, GE SCADA upper configuration software, IEC60870-5 based substation telecontrol system and auxiliary DCS control system for power plants.
Mounting Specification: Standard 19-inch cabinet rack installation; Overall dimensions: 265(L)×233(W)×160(H) mm, Net Weight ≈2.7kg. Constructed with full steel chassis and gold-plated VME bus backplane equipped with multi-slot VME connectors. The PCB is fully coated with three-proof conformal coating to resist moisture, dust and harmonic corrosion, suitable for operating environments of substation master control rooms and power plant control buildings.
Configuration: Multi-slot VME32 parallel bus backplane, centralized power distribution circuit, onboard power filter and lightning protection, external terminal blocks on backplane for digital/analog field wiring, alarm relay terminals, T1/DS1 carrier interface sockets and dedicated D.20 Link backplane bus connectors.
II. Technical Specifications
(1) Bus & Slot Parameters
Bus Standard: VME32 (IEEE1014) 32-bit parallel VME bus with native data/address bus routed on backplane; proprietary embedded D.20 Link high-speed internal bus based on HDLC protocol for D20 local I/O communication.
Slot Allocation: Factory-configured with 8~12 universal 6U VME slots supporting mixed installation of D20 CPU, analog acquisition, digital I/O and T1 carrier modules. Maximum backplane throughput reaches 40MB/S to satisfy high-speed real-time data exchange for power monitoring applications.
(2) Electrical Power Specifications
Power Distribution: Standard VME DC +5V & ±12V power fed from wide-range AC85~264V external switching power supply. The backplane integrates graded overcurrent fuses, EMI power filtering and surge suppression with independent per-slot current limiting, ensuring a faulty single module cannot disrupt power supply for the entire unit.
Isolation: Optocoupler isolation ≥1500VAC between analog terminal area and digital VME bus to block high-voltage field interference and protect master CPU boards.
(3) Communication Terminal Specifications
External Backplane Interfaces: 7×RS232/RS485 serial terminals for telecontrol, on-site debugging and host communication; 2×DSX-1/T1 carrier terminal blocks for 1.544Mbps digital trunk used in conventional telecom & power carrier networking; D20 internal HDLC backplane bus and passive dry-contact fault alarm output terminals.
(4) Environmental Specifications
Continuous Operating Temperature: -40℃ ~ +70℃; Storage Temperature: -45℃ ~ +85℃.Humidity: 5%~95% RH non-condensing. Complies with Level 4 IEC61000 industrial EMC standards to withstand electromagnetic interference from substation instrument transformers and high-voltage switchgear, conforming to environmental requirements specified in IEC60870 for power automation equipment.
III. Key Features
Integrated VME Backplane & Centralized Power Allocation
Unified VME bus signal routing and centralized power distribution eliminate messy discrete field wiring and reduce potential fault points; all plug-in modules of D20 system share the backplane bus and power supply.
Embedded Native High-Speed D.20 Link Internal Bus
Dedicated HDLC-based internal bus enables the master CPU to poll all I/O modules at high speed, realizing millisecond-level acquisition of analog measurements and binary status data, forming the core bus architecture of D20 power RTU products.
Graded Hardware Fault Isolation Design
Independent current-limiting fuse fitted for each slot; short-circuit or damage of one I/O module only cuts off power to its corresponding slot without affecting the master controller and other functional slots, ensuring uninterrupted substation monitoring operation.
Full Backward Compatibility with Entire D20 Module Series
Compatible with all generations of D20ME Gen1/Gen2 CPU boards, legacy analog acquisition cards and traditional T1 digital carrier modules. It can be directly drop-in installed during renovation or spare replacement of aged D20 substation systems without cabinet rewiring modification.
Centralized Fault Alarm via Backplane Terminals
System power loss, bus malfunction and individual slot faults are aggregated to backplane dry-contact alarm terminals, which connect to audible/visual alarm units on substation telecontrol panels and upload fault information to upper SCADA system.
External AC power input → Filtering and voltage regulation via backplane power circuit → Split distribution of +5V/±12V to all VME slots;
Downlink Control Flow: Remote control commands issued by upper SCADA → Transmitted through D20ME CPU via VME backplane and D.20 Link bus → Delivered to DI/DO output modules to drive on-site circuit breakers and disconnecting switches;
Uplink Data Collection Flow: PT/CT analog signals and passive switch status contacts → Feed into backplane via field terminals → Sampled by I/O modules → Aggregated to CPU over backplane bus → CPU encapsulates data into IEC60870 protocol frames → Uploaded to dispatch master station via serial port or T1 carrier;
Fault Handling Logic: Short-circuit on any slot triggers corresponding slot fuse blowout for isolation; backplane activates dry-contact alarm and pops up fault alert on host SCADA software.
- Power Substations: Main chassis backplane for D20-series RTU telecontrol devices deployed at 110kV/220kV substations, core component of telemetry, telesignalling and remote control monitoring systems;
- Thermal & Hydropower Plants: Original backplane for unit auxiliary control and station service monitoring D20 systems, replacement spare for overhaul of outdated GE D20 installations;
- Power Grid Dispatching Retrofit: Replacement spare for substation upgrading projects using conventional T1 carrier networking and legacy SCADA modernization with retained D20 monitoring units;
- Rail Transit Power Distribution Stations: Original motherboard for D20 RTU remote monitoring chassis at railway traction power supply substations.
![]()
