Signal Conditioning and Processing

Supported Signal Types

Analog I/O: 4–20 mA input and output

Position feedback: LVDT displacement signals

Temperature: Thermocouple inputs

Dynamic signals: Vibration measurement inputs

Actuator outputs: Servo valve drive signals

Discrete signals: Relay inputs/outputs

Jumper and Switch Configuration

J1 / J2: Milliampere output circuit selection

J5 / J6: Output current range selection (20 mA / 200 mA)

J7: RS-232 test interface enable

J8: Oscillator control

Multiple onboard DIP switch blocks provide flexible selection of signal type, range, and operating mode.

Signal Processing Hardware

Integrates precision signal amplifiers, filtering, and isolation circuits.

Ensures high measurement accuracy, stability, and strong immunity to electrical noise, making it suitable for harsh industrial electromagnetic environments.

Key Interfaces and Connections

Backplane Communication

VME bus via P1 connector, occupying one VME slot.

Provides high-speed data exchange with the Mark V main control processor.

External Interfaces

40-pin connector to the TCQA terminal board for field signal input/output.

3PL interface connection to the STCA board.

JE interface to the TCQC board for transmission of generator and line measurement signals.

Status Indication

Onboard RUN/STATUS LED for rapid identification of:

Power supply faults

Communication failures

Signal conditioning abnormalities

Physical Characteristics and Power Requirements

Form factor: Standard Mark V VME board

Dimensions: Approximately 160 mm × 100 mm × 40 mm

Weight: Approximately 0.9–1.1 kg

Power supply: 24 VDC, with built-in surge and overvoltage protection

Operating temperature: –40 °C to +70 °C

Core Functions and Typical Applications

Signal Acquisition and Conditioning

Scales, filters, and isolates 4–20 mA, LVDT, thermocouple, and related signals received via the TCQA terminal board.

Outputs standardized, noise-immune signals to the Mark V main control card.

Actuator and Drive Output

Generates servo valve drive signals to control actuators.

Supports turbine fuel system and inlet guide vane control loops.

System Communication and Coordination

Exchanges I/O data and control commands with SDCC, LDCC, and other Mark V control cards over the VME bus.

Ensures synchronized operation across the turbine control system.

Diagnostics and Fault Detection

Combined LED indication and system alarm reporting enable rapid identification of:

Signal open-circuit conditions

Range configuration errors

Power supply abnormalities

Typical Applications

GE Mark V gas and steam turbine control systems.

Commonly paired with DS200SDCCG4AFD (drive control card) and DS200LDCCH1A (communication board).

Used in fuel control, speed regulation, and vibration monitoring functions.