ALSTOM DSI1817 TRVC062335000 CP00003934 Digital Servo Control Board Card

ALSTOM DSI1817 TRVC062335000 CP00003934 Digital Servo Control Board Card

I. Product Description
DSI1817: Hardware main model (Digital Servo Interface board)
TRVC062335000: Original factory complete machine material order number
CP00003934: PCB circuit board silk-screening number, production traceability code
Brand: ALSTOM (Alstom Power, later merged into GE Power)
Compatible system: ALSPA P320 gas turbine / steam turbine control system, used in conjunction with the previously queried CMP1838 main control, MC1AB37 DI/DO board, and CS-TX3-3 adapter board

Product Positioning
A triple redundancy servo drive control board, specially designed for gas turbines and steam turbines for closed-loop regulation of electro-hydraulic servo valves, is the core I/O board for load, fuel valve, and IGV inlet guide vane control in the unit, meeting SIL2 safety level control loop requirements.

Core Hardware Functions
High-precision differential servo output
Output ±10V differential analog servo signals, directly drive electro-hydraulic servo valves, achieving millisecond-level precise positioning and adjustment of fuel regulating valves, inlet guide vanes, and bypass valves.
TMR triple redundancy hardware architecture
Three independent computing circuits within the board, median voting output, eliminating single-point faults, suitable for critical safety control loops of gas turbines.
Valve position feedback acquisition
Synchronously collect LVDT displacement sensor valve position feedback signals, closed-loop PID operation, eliminating valve position drift.
Full-channel fault self-diagnosis
Servo break, LVDT short circuit, output over-limit, inconsistent three-way voting faults are reported to the main control CMP1838 in real time, and panel indicator lights give alarms.
Backplane high-speed bus interaction
Through the rack parallel bus, exchange control instructions, valve positions, and fault status data with the CMP1838 main control in real time.

Key Electrical Parameters
Power supply: Rack backplane 24VDC ±10%
Servo output: ±10V differential signal, drive current ±20mA
Feedback acquisition: Compatible with LVDT linear displacement sensor
Isolation level: 2kV AC electrical isolation between channels, anti-strong electromagnetic interference from power plants
Operating temperature: -20℃ ~ +60℃ (installed in the cabinet room)
Structure: Standard European VME plug-in card, front and rear dual connectors (back end bus, front servo terminals)
Power consumption: ≤12W
Protection: IP20, only for use in the control cabinet

Complete Set of Accessories (your complete ALSPA P320 hardware)
CMP1838 (TRVCO62345000): System main control CPU board
DSI1817 (TRVC062335000): Servo valve regulation dedicated board (this model)
MC1AB37 4022.437.1856: DI/DO analog quantity acquisition output board
CS-TX3-3. 81X2.54-64TW: 64-channel signal transfer terminal board

Application Scenarios
Combined cycle gas turbine (6B/9E/7FA units) combustion control
Large thermal power plant steam turbine regulating valve, bypass valve closed-loop regulation
Hydropower station water turbine governor servo control
Unit SIS safety interlock, load automatic regulation system