Description
1. Product Overview
Part Number: IS200BICLH1BBA
Manufacturer: GE Vernova
Compatible System: Exclusively designed for GE Speedtronic Mark VI simplex / triple redundant VME rack turbine control system, mandatorily installed only in Rack Slot 5 with no cross-slot mounting. It serves as the signal relay hub between Innovation Series drive main control unit and BPIA/BPIB bridge personality interface boards & SCNV signal conversion boards, undertaking drive command forwarding, temperature monitoring, fan speed regulation, contactor status detection and fault message upload, acting as a core link board for closed-loop control of unit excitation IGBT power modules.Product Definition: BICL series IGBT drive source bridge PCB interface board equipped with a 1024-bit serial ID memory chip for permanent board identity storage. It integrates 4 relays, 3 bridge rectifiers and multiple logic ICs. Dual P1/P2 128-pin VME backplane connectors connect to system bus to realize drive command transmission, 4-channel RTD temperature sampling, PWM fan speed control, MA/MB contact auxiliary contact detection and centralized fault report. No external front wiring terminals or status LEDs are equipped; all data interaction and self-diagnosis are completed solely via backplane bus.
2. Hardware Structure & Six Functional Units
2.1 Dual VME Backplane Bus Interaction Unit
Two independent 128-pin gold-plated VME backplane connectors labeled P1 and P2 are arranged on the rear side. P1 transmits bridge control signals, temperature data, fan speed commands and fault strings; P2 supplies main control logic power and system bus communication. Dual connectors provide redundant backup to maintain basic communication if one path suffers poor contact. It strictly complies with Mark VI VME64 bus timing and automatically executes board ID verification and bus handshake upon power-up.
2.2 IGBT Drive Command Bridging & Relay Unit
It acts as an intermediate conversion link between drive main control board and BPIA/BPIB/SCNV daughter boards. The onboard EPLD programmable logic device parses drive instructions issued by CPU, reorganizes signal level and timing before forwarding to subordinate boards. It galvanically isolates main control low-voltage logic from IGBT high-power drive circuits to prevent interference backflow and chip damage on the master controller side.
2.3 Multi-Channel Status & Analog Acquisition Unit
4-channel RTD platinum resistance temperature inputs monitor the temperature of power bridge modules and cabinet ambient environment. Two MA/MB auxiliary contact detection inputs accept passive contact signals ranging 24~115V AC/DC. Fault signals from lower-level boards are aggregated into standardized fault packets and uploaded to upper diagnostic software to pinpoint abnormal drive branches accurately.
2.4 PWM Fan Speed Regulation & Relay Output Unit
Pulse-width modulation signals are output to adjust cooling fan speed dynamically according to cabinet internal temperature for energy saving and noise reduction. Four dedicated signal relays with schematic diagrams printed on top surfaces are integrated for bridge circuit switching, hard interlock output and loop status latching. Surge absorption circuits are added to relay loops to withstand transient voltage spikes during equipment startup and shutdown.
2.5 Hardware ID Storage & Power-On Self-Test Unit
A non-volatile 1024-bit serial memory chip permanently stores part number, hardware revision and factory serial number with data retention after power loss. The system reads ID information automatically during startup to match configuration parameters and triggers an alarm for ID mismatch, bus failure or open acquisition channels. No onboard fuses, test points, adjustable trimmers or LED indicators are integrated; all diagnostic information is only accessible via upper-level monitoring software.
2.6 Slot Position Limitation & Industrial Conformal Coating Unit
The front panel is clearly marked SLOT 5 ONLY with mechanical positioning limit to avoid pin bending and permanent PCB damage from misinsertion into other slots. Multi-layer gold-plated flame-retardant FR-4 PCB is fully coated with moisture, corrosion and salt-spray resistant conformal coating. Fanless passive cooling via rack air duct supports 24/7 continuous operation under high cabinet temperature, long-term turbine vibration and humid coastal industrial environments.
3. Detailed Technical Specifications
(1) Core Hardware & Interface Parameters
| Item | Specification |
|---|---|
| Model | IS200BICLH1BBA Mark VI BICL Bridge Interface Board |
| Platform | GE Speedtronic Mark VI VME Rack Gas & Steam Turbine Control System |
| Mandatory Mounting Slot | Fixed Slot 5 only; cross-slot installation prohibited |
| Backplane Interfaces | Dual P1/P2 128-pin gold-plated VME connectors; no external front terminals |
| Onboard Components | 4 signal relays, 3 bridge rectifiers, 1024-bit serial ID chip, EPLD logic array |
| Acquisition Channels | 4×RTD temperature inputs; 2×MA/MB contact detection inputs (24~115V AC/DC) |
| Output Functions | PWM fan speed control signal; interlock relay dry contact output |
| Onboard Auxiliary Parts | No fuses, test points, LED indicators or adjustable hardware |
| Identification Mode | Automatic board ID reading and configuration comparison during power-on |
(2) Electrical & Communication Parameters
- Power Supply: Multi-channel standard DC power fed from Mark VI VME rack backplane
- Contact Sensing Range: 24V~115V AC/DC universal, sampling current 4~10mA
- Bus Protocol: Native Mark VI VME parallel backplane bus with no extra protocol converter
- Fault Upload Mode: Fault data is transmitted as character strings to CPU and SCADA HMI via backplane bus
- Hot Swap Regulation: Hot plugging while rack is energized is strictly forbidden, which causes backplane short-circuit and permanent burnout of logic & memory chips.
(3) Environmental Operating Parameters
- Operating Temperature: -20℃ ~ +65℃
- Storage & Transport Temperature: -40℃ ~ +70℃
- Humidity: 5%~95%RH non-condensing, no corrosive gas or salt fog deposition
- Ingress Rating: IP20 for installation inside sealed industrial control cabinets only
(4) Mechanical Mounting Dimensions
- Mounting Method: Horizontal plug-in into single VME rack slot, secured with two front panel locking screws
- Net Weight: Approx. 0.75kg
- PCB Finish: Anti-oxidation gold plating on traces and backplane contacts for repeated maintenance plugging
- Structure: Integrated single-piece VME standard width board with no detachable subassemblies
4. Product Advantages
- Hierarchical isolation of drive loops prevents EMI interference from high-power IGBT circuits from infiltrating the main control CPU, eliminating system spurious trips and master board hardware damage at the hardware level.
- All-in-one monitoring of temperature, contactor status, fan operation and subordinate board faults enables direct fault location via upper diagnostic software without on-site wiring disassembly, drastically shortening unit outage troubleshooting duration.
- Physical and printed dual slot restriction eliminates configuration mismatch errors caused by human misinstallation, avoiding drive command loss and power device runaway safety hazards.
- Factory preprogrammed board ID eliminates on-site configuration modification during spare part replacement; the system automatically matches project parameters after power-on with no program download or address reconfiguration required.
- Wear-free component-free design requires only annual screw tightening inspection during unit overhaul cycles with minimal routine maintenance workload.
- Native triple redundant architecture support enables fault tolerance for large generating units; two redundant boards can take over control logic if one unit fails to prevent immediate unit shutdown.
5. Application Scenarios
Combined-Cycle Thermal Power Gas Turbine Main Control System
Serves as the core bridging control board for Mark VI IGBT excitation units and variable-frequency startup loops, transmitting excitation regulation and grid connection start/stop commands, monitoring power bridge temperature and cabinet fan conditions, and reporting drive loop faults, being a critical link for grid-connected power generation load adjustment.
Petrochemical Large Process Compressor Control System
Deployed in Mark VI control systems of cracking gas compressors and process drive turbines for command forwarding of high-power IGBT variable-frequency modules, overheat protection and contactor loop monitoring to guarantee stable signal transmission for continuous chemical production and prevent process interruption from interlock misoperation.
Legacy Mark VI System Retrofit & Spare Part Replacement
Direct in-situ replacement for aging BICL boards suffering from pin oxidation, ID recognition failure and channel damage; additional installation for expanding drive channels when adding new IGBT power branches.
Preventive Spare Part Inventory for Power Plants
Stocked as critical automation spare parts to respond to sudden board hardware failure and avoid unit load reduction, unplanned shutdown or power module explosion due to loss of excitation drive communication.
