YOKOGAWA VF701

Description

1. Product Description

2. Product Parameters

Parameter	Specification
Model	VF701
Brand	YOKOGAWA
Product Type	Variable Frequency Drive (VFD)
Power Range	0.4–7.5 kW (1.0–18.0 A)
Voltage Input	– Single-phase: 200–240V (50/60 Hz) – Three-phase: 200–240V, 380–480V (50/60 Hz)
Control Method	Vector control (sensorless), V/f control
Output Frequency	0.1–400 Hz (resolution: 0.01 Hz)
Protection Features	Overload (150% for 60 seconds), overvoltage, undervoltage, short circuit, thermal
Communication	Built-in RS-485 (Modbus RTU); optional Ethernet/Fieldbus (Profibus, DeviceNet)
Dimensions (W×H×D)	Compact design (varies by power: e.g., 7.5 kW: 190 × 330 × 200 mm)
Weight	2.5–12 kg (varies by power)
Environment	Operating: -10°C to +50°C (derate above 40°C); Storage: -20°C to +65°C

YOKOGAWA VF701

3. Advantages and Features

• Precision Control: Sensorless vector control for high torque at low speeds (150% torque at 0.5 Hz).
• Energy Efficiency: Auto-tuning and energy optimization modes reduce power consumption by up to 30%.
• Reliability: Heavy-duty design with IP20/IP54 enclosures (optional) for harsh environments.
• Flexible I/O: Multiple digital/analog inputs/outputs (4–20 mA, 0–10V) for integration with PLCs and sensors.
• Safety Compliance: STO (EN 61800-5-2) and CE/UL/cUL certifications.
• User Interface: Backlit LCD display with parameter copy function (via USB or keypad cloning).

4. Application Areas and Use Cases

• Industries: HVAC (fans/pumps), conveyor systems, compressors, machine tools, food processing.
• 典型应用场景:
  • HVAC: Optimizing fan speed in smart buildings to reduce energy costs.
  • Manufacturing: Controlling conveyor belts with precise torque for material handling.
  • Water Treatment: Adjusting pump speed based on water demand (variable pressure control).

5. Competitor Comparison

Feature	YOKOGAWA VF701	Competitor (e.g., ABB ACS580/Siemens G120)
Vector Control	Sensorless (standard)	Sensorless (optional in some models)
Energy Saving	Built-in auto-tuning + Eco mode	Similar features but higher cost
Modular Design	Easy-to-replace parts (e.g., cooling fans)	Less modular; requires full unit replacement
Communication	Built-in Modbus RTU (optional Ethernet)	Similar but higher configuration complexity
Cost	Competitive pricing (10–15% lower than peers)	Premium pricing for equivalent specs

YOKOGAWA VF701

6. Selection Recommendations

• Power Requirements: Match the VFD power (kW) to the motor rating (e.g., 7.5 kW for a 10 HP motor).
• Voltage Type: Choose single-phase (200–240V) for small motors (≤2.2 kW) or three-phase for larger systems.
• Environment: Select IP54 enclosure for dusty/wet environments (e.g., water treatment plants).
• Communication: Add optional Ethernet/Fieldbus modules for integration with Yokogawa’s DCS (e.g., Centum VP).

7. Precautions

• Installation:
  • Ensure proper ventilation (vertical mounting recommended).
  • Use shielded cables for motor wiring (≤50 m for 400 V class).
• Motor Matching: Perform auto-tuning (motor parameter setup) before operation.
• Safety:
  • Disable power for 5 minutes before servicing (capacitor discharge).
  • Ground the VFD and motor per local codes (safety earth: ≥4 mm²).
• Software: Update firmware regularly via Yokogawa’s V-SFT software (free download).

8. Related Models & Accessories

• Models:
  • VF700 Series: VF700 (base model), VF701 (enhanced with LCD), VF702 (with built-in PLC).
  • High-Power: VF800 series (7.5–500 kW).
• Accessories:
  • Line reactors (reduces harmonics), DC chokes, braking units, remote keypads.