Basler DECS-200-1L

Technical Specifications

• Rated power stage output: 1A continuous DC excitation current
• Input sensing voltage: 3-phase AC generator terminal voltage
• Power supply: 85V to 265V AC / 90V to 300V DC wide range input
• Communication interface: RS-485 port supporting Modbus protocol

Functional Features

• Automatic Voltage Regulation with high steady-state accuracy
• Support for power factor control and VAR control modes
• Built-in generator protection including overexcitation, underexcitation and overvoltage
• Auto-tuning PID function for fast system commissioning
• Programmable logic for custom application logic

Application Scenarios

• Standby diesel generator sets
• Small hydroelectric power generation systems
• Marine generator excitation control
• Industrial co-generation power units

Performance Parameters

• Voltage regulation accuracy: ±0.25% of rated voltage under steady state
• Response time: less than 100ms for 100% step load change
• Operating temperature range: -40°C to +70°C
• Isolation withstand voltage: 2500V AC between power and signal circuits

Material Composition

• Enclosure: flame-retardant ABS engineering plastic
• Internal circuit board: FR-4 grade PCB with conformal coating
• Power components: MOSFET power devices
• Connectors: industrial-grade screw terminals with nickel plating

Structural Features

• DIN rail mountable or panel mountable design
• Front-facing user interface with LED indicators and operation buttons
• Plug-in terminal blocks for quick wiring and replacement
• Compact form factor to save cabinet space

Working Principle The controller samples the generator terminal voltage and current signals, compares the actual voltage with the reference setpoint, and adjusts the excitation current output through the PWM power stage. By changing the excitation current of the generator rotor, it regulates the generator terminal voltage and reactive power output, maintaining stable generator operation under varying load and speed conditions.

Installation Requirements

• Install on standard 35mm DIN rail or fix with mounting screws
• Ensure the ambient temperature is within the operating range and well ventilated
• Use twisted shielded cables for voltage and current sensing wiring
• Separate excitation power cables from low-voltage signal cables
• Reliable grounding is required for both the controller housing and shielding layer

Usage Precautions

• Verify the correct connection of sensing voltage and current phases before power-on
• Do not adjust excitation parameters arbitrarily without professional guidance
• Regularly check the tightness of wiring terminals to avoid poor contact
• The excitation output circuit must be equipped with overcurrent protection fuses
• When performing maintenance, fully discharge the excitation circuit to prevent induced voltage hazards