Core Functions

1. Dual control modes: isochronous mode for single‑unit constant‑speed operation; droop mode for multi‑unit parallel load sharing.

2. Multi‑loop PID control: speed, load, inlet pressure, extraction/admission header pressure regulation, with critical speed avoidance.

3. Supports dual actuator outputs, startup ramp, warm‑up control, load rejection protection and overspeed trip test.

4. On‑panel keypad & 2‑line LED display for local configuration, real‑time monitoring and fault logging.

5. Modbus‑RTU/ASCII communication + 4‑20 mA analog signals for seamless DCS/PLC integration.

Electrical Specifications

• Power Supply: 88‑132 VAC (47‑63 Hz) / 90‑150 VDC, power consumption 143 VA

• Speed Input: Magnetic pickup (MPU), frequency range 0.5–25000 Hz

• I/O Configuration: 2 actuator outputs, 6 analog inputs, 6 analog outputs, 16 discrete inputs, 8 relay outputs

• Communication: RS‑232, RS‑485 dual‑port Modbus protocol

• Control Precision: ±0.25% steady‑state speed regulation accuracy

• Certifications: Class 1 Div 2 Groups A/B/C/D, Class 1 Zone 2 Group IIC, CE, UL certified

Environmental & Mechanical Features

• Operating Temperature: −25 °C ~ +65 °C (NEMA 4X enclosure: −25 °C ~ +55 °C)

• Protection Grade: NEMA 4X / IP56 (front panel), IP20 (rear terminals)

• Mounting: Front panel‑mount

• Dimensions: 355.6 × 279.4 × 101.6 mm (14×11×4 inch)

• Weight: Approx. 4.5 kg (9.11 lbs)

Typical Applications

• Speed‑load & extraction control for industrial steam/gas turbines

• Power plant turbo‑generator governing systems

• Petrochemical & oil‑gas compressor drive turbines

• Marine prime mover turbine safety control systems