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Description
GE DS200LDCCH1AJA Drive Control CPU Board
Configured for executing LCI drive control algorithms and motor starting logic in GE Mark IV LCI systems, the GE DS200LDCCH1AJA (DS200LDCCH1A) Drive Control CPU Board provides direct physical execution of SCR firing angle calculations and system coordination.
Hardware Specifications
Parameter
Specification
Model
DS200LDCCH1AJA
Brand
GE
Origin
USA
Weight
0.85 kg
Dimensions
243.8 x 172.7 x 38.1 mm
Operating Temp
0 to 50 deg C
Power Consumption
24 VDC bus input
Microcontroller
32-bit, 50 MHz clock speed
Program Memory
1 MB Flash
Data Memory
512 KB SRAM
Bus Architecture
MARK IV/QDII bus
Digital I/O
16 Inputs (24 VDC), 16 Outputs (24 VDC, 0.5 A)
Analog I/O
8 Inputs (4-20 mA), 4 Outputs (0-10 V)
Communication Interfaces
QDII bus, CANbus, RS-485
Deterministic Control & Backplane Bus Execution
The board leverages high-speed backplane bus communication velocity to execute real-time SCR firing angle calculations based on motor speed feedback and torque demand limits. Operating across deterministically managed QDII bus and CANbus networks, it achieves synchronized execution across peripheral signal distribution and acquisition cards. The 32-bit microcontroller maintains rigid cyclic control execution without bus arbitration latency, ensuring phase angle alignment and system stability during high-torque turbine starting cycles.
Frequently Asked Questions
Q: What precautions should be observed regarding on-board capacitor energy storage during maintenance?
A: On-board filtering and backup capacitors (220 uF and 100 uF) retain residual electrical energy after main power disengagement. Allow a minimum discharge dwell time before removing the board from the bus frame or handling exposed solder traces.
Q: How are parameter retainage settings preserved across control power cycles?
A: Static setup parameters and operational logs reside within battery-backed SRAM. Ensure the local battery retention circuit maintains nominal voltage prior to prolonged power interruptions to prevent non-volatile parameter corruption.
Field Installation Guidelines
Electrostatic Discharge (ESD) Protection: Always wear a grounded wrist strap attached to unpainted cabinet metal before touching card edges or setting jumpers on the CPU board.
Bus Edge Alignment: Align the card edges precisely with the MARK IV chassis card guides. Apply uniform pressure to fully seat edge connectors into the backplane, ensuring zero mechanical binding.
Cable Strain Relief: Ensure RS-485 and CANbus shield wires are tied directly to local frame ground points. Route low-voltage signal lines away from high-power SCR gate drive wiring to prevent inductive cross-coupling.
