YASKAWA CIMR-G5A4011 – 400 V, 11 kW General‑Purpose AC Drive for Reliable Motor Control

The YASKAWA CIMR-G5A4011 belongs to the Varispeed G5 series, a proven workhorse for 400 V class motors. From my experience, this model is typically used as a 11 kW (about 15 HP) inverter in general-purpose applications—think conveyors, pumps, fans, mixers, and packaging lines where smooth speed control and durable operation matter more than fancy add-ons. One thing I appreciate is how the G5 series balances straightforward parameterization with stable torque at low speed, which keeps retrofit projects predictable and downtime low.

Company’s Order Placement Process and Guarantees

• Warranty period: 365 days
• Delivery time: typically 1 week for in‑stock; no more than one month at the latest
• Payment terms: 50% advance payment; full payment before delivery
• Express delivery methods: FedEx, UPS, DHL

Key Features

• 400 V class, 11 kW rating – Well-suited for 15 HP motors in standard industrial duty.
• V/f and sensorless vector control – Typically offers steady torque and smooth acceleration without an encoder.
• Wide frequency range – Usually supports 0.1–400 Hz, handy for variable speed processes.
• Flexible I/O – Commonly includes analog 0–10 V or 4–20 mA and multiple programmable digital inputs/outputs for quick integration.
• Panel/cabinet mounting – IP20 open-chassis design with optional NEMA 1 kit for enclosed installs.
• Fieldbus expandability – RS‑485 Modbus/Mechatrolink and popular networks (DeviceNet, Profibus‑DP, CC‑Link) via option cards in many cases.
• Legacy drop‑in replacement – Appears to be a direct fit for existing G5 installations, reducing rewiring effort.

Technical Specifications

Application Fields

This model fits well in maintenance replacements and mid‑power new builds across:

• Material handling: belt conveyors, indexers, shuttle drives where soft start and speed trim cut mechanical wear.
• HVAC and utilities: process fans and centrifugal pumps, with energy savings at partial loads.
• Food & packaging: mixers, form-fill-seal lines, and feed systems that benefit from stable low‑speed torque.
• General factory automation: winders, extruders, machine tools where a robust general‑purpose VFD is preferred.

A maintenance lead at a packaging plant told us they swapped a faulty CIMR-G5A4011 for a like‑for‑like unit and had the line running again in under two hours—no PLC rework, just parameter copy and I/O check. That’s the practical upside of staying within the G5 family.

Advantages & Value

• Reliability – G5 series drives are known to run for years in tough environments with routine maintenance.
• Compatibility – Usually drop‑in compatible with existing G5 wiring and parameter sets, reducing retrofit time.
• Cost Control – Keeps total installed cost down by reusing cabinets, wiring, and existing network architecture.
• Support & Spares – From my experience, spares and option cards are still widely available, which simplifies lifecycle management.

Installation & Maintenance

• Cabinet & ventilation – Mount in a clean, dry panel with forced ventilation. Allow clearance above/below the heat sink for airflow and derating margins if the ambient is warm.
• Wiring – Use properly sized shielded motor cable; ground at the drive end. Keep control wiring separated from power cables to minimize noise.
• EMC & line quality – In many cases, adding a line reactor or EMC filter helps meet site requirements and protect upstream equipment.
• Safety – Lockout/tagout before service. Verify discharge of DC bus capacitors per the manual’s wait time.
• Routine care – Dust cleaning, fan inspection, and periodic torque checks on terminals. Parameter backup is recommended after commissioning.

Quality & Certifications

YASKAWA G5 series units are commonly marked with CE and UL/cUL on most variants. Exact markings depend on the specific sub-model and enclosure option. Manufacturer warranty support is typically available via our 365‑day coverage.

Recommended Accessories & Supporting Components

• Braking resistor – For rapid deceleration on high‑inertia loads; protects the DC bus from overvoltage trips.
• Input line reactor – Helps with harmonic mitigation and protects the rectifier against line transients.
• EMC/RFI filter – Useful where conducted emissions limits apply or the control cabinet hosts sensitive electronics.
• Fieldbus option cards – DeviceNet, Profibus‑DP, CC‑Link, or RS‑485 Modbus to integrate with existing PLC networks.
• NEMA 1 kit – Upgrades IP20 open chassis for enclosed, dust‑reduced installations.