Yaskawa CIMR-P5C43P7 400V 3.7kW AC Inverter (P5 Series)
The Yaskawa CIMR-P5C43P7 is a compact, high-performance AC drive belonging to the P5 (or Varispeed P5) series. Designed for three-phase 400V input, it delivers 3.7kW (5 HP) output to standard induction motors. The drive is optimized for variable torque loads such as fans, pumps, and blowers, but also handles constant torque applications like conveyors and mixers. Its built-in PID controller, energy-saving algorithms, and robust PLC I/O interface make it a versatile solution for industrial automation.
Electrical and Power Specifications
Rated Motor Power: 3.7 kW (5 HP)
Rated Output Current: 9.2 A (constant torque) / 11 A (variable torque)
Input Voltage: Three-phase 380–480V AC ±10%, 50/60Hz ±5%
Output Frequency Range: 0.1–400 Hz
Overload Capacity: 120% for 60 seconds (constant torque), 110% for 60 seconds (variable torque)
Carrier Frequency: 2–15 kHz (adjustable, derating above 8 kHz)
Control Methods and Performance
The CIMR-P5C43P7 supports three control modes: V/f control (linear or square), V/f with PG feedback (optional encoder), and sensorless vector control for improved low-speed torque. Sensorless vector provides 150% starting torque at 0.5 Hz. Speed regulation is ±0.5% of base speed with slip compensation enabled. The drive includes an automatic torque boost that adjusts voltage at low frequencies to overcome static friction.
Built-in PID Control
A dedicated PID controller is integrated, accepting feedback from a 4-20mA or 0-10V transducer (pressure, flow, temperature). The PID setpoint can come from an analog input or a PLC via serial communication. The drive features sleep and wake-up functions to save energy during low demand (e.g., pump systems). PID output limits, anti-windup, and direct/reverse action are programmable.
I/O and PLC Integration
The drive provides: 7 digital inputs (24V DC, programmable for run/stop, multi-speed, JOG, fault reset, PID enable), 3 relay outputs (250V AC, 2A) for run status, fault, and frequency agree; 2 analog inputs (0–10V or 4-20mA selectable) for speed reference and PID feedback; 2 analog outputs (0–10V) for output frequency and current monitoring. A built-in RS-485 port supports Modbus RTU and Yaskawa's MEMOBUS protocol, allowing a PLC to read/write all parameters, start/stop the drive, and monitor real-time data such as frequency, current, and power.
Energy Saving Features
The CIMR-P5C43P7 includes an energy-saving algorithm that reduces motor voltage based on load torque, achieving up to 30% energy savings compared to fixed speed operation. For variable torque loads (fans/pumps), the square V/f profile matches the motor's cubic torque curve, further reducing losses. A built-in energy monitor displays cumulative power consumption (kWh) and CO₂ reduction estimates, which can be read by a PLC for energy management systems.
Protection and Reliability
Protections include: overcurrent (instantaneous and time-delayed), overvoltage (DC bus > 800V), undervoltage (< 380V), motor overload (electronic thermal), drive overload, ground fault, output short circuit, and heatsink overtemperature (thermistor). The drive also features a stall prevention function that automatically reduces frequency during excessive current or voltage. An optional braking transistor is built-in for models up to 3.7kW, with an external braking resistor available for high-inertia loads.
Mechanical Dimensions and Installation
Dimensions: 250mm (H) × 140mm (W) × 155mm (D). Weight 3.2 kg. Mounting by four M5 screws on a vertical panel. Ambient temperature range: -10°C to +50°C (derate above 40°C at 2.5%/°C). Humidity: 20–90% non-condensing. Altitude up to 1000m without derating. Enclosure IP20 (open type) requires installation in a pollution degree 2 environment.
Applications in PLC-Controlled Systems
Common applications include: HVAC fans and pumps controlled by building automation PLCs, conveyor belt drives with speed changes via analog output from a PLC, and extruder drives requiring precise speed regulation. The drive's multi-speed function (up to 16 preset speeds via digital inputs) allows a simple PLC with only digital outputs to select speeds without analog modules. The built-in PID is often used to control pump discharge pressure using a PLC as a supervisory setpoint generator.
Standards and Compliance
The CIMR-P5C43P7 complies with CE (EMC Directive EN 61800-3, Low Voltage Directive EN 61800-5-1), UL 508C, cUL, and RoHS. It meets the harmonic standard EN 61000-3-2 with optional input filter. The drive is rated for pollution degree 2 and overvoltage category III.
Conclusion
The Yaskawa CIMR-P5C43P7 400V 3.7kW inverter delivers reliable motor control with energy-saving features, flexible I/O, and easy PLC integration. Its robust design and protection suite make it a cost-effective choice for fan, pump, and light industrial conveyor applications.
