MIV04A-E Okuma
Wake Industrial LLC is not an authorized distributor of this product.
The Okuma MIV04A-E is an inverter unit from the MIV Servo Drives series and supports one axis with an applicable motor capacity of 4 kW. It features a general-purpose detector interface, 24 VDC control supply, and a 300 VDC DC bus supply. The supported motor types include BL and PREX, and the unit weighs 5.0 kilograms.
Internal Product Review
The MIV04A-E is an Okuma inverter unit designed for BL/PREX motors with a 4 kW motor capacity. A 24 VDC control supply paired with a 300 VDC DC bus gives the drive a clean, industrial-ready electrical foundation. Single-axis operation and a general-purpose detector interface make the package especially practical for precise servo integration.
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Product Description:
The MIV04A-E is an inverter unit produced by Okuma for the MIV Servo Drives series. Serving as a servo drive, it transforms power from the shared DC link into accurate three-phase outputs that command brushless motors used in machining centers and automated cells. By controlling current and voltage on a dedicated axis, the device delivers the precise torque and speed regulation required for coordinated motion in industrial automation.
The drive is sized for motors up to 4 kW, so its power stage matches medium-duty spindles and feed axes. It controls one axis, simplifying channel mapping in the CNC control. The control electronics draw power from a separate 24 VDC supply; isolating the low-level circuitry from the bus helps minimize noise during encoder sampling. The power section is energized from a shared DC link at 300 VDC, allowing multiple inverters to return regenerated energy to a common resistor bank. Address selection on the backplane is handled by a 5-bit rotary switch that provides up to thirty-two unique addresses. A general-purpose detector interface accepts incremental or absolute feedback signals for closed-loop position control.
For encoder support, the unit offers dual excitation rails: a 12 VDC high-voltage channel for magnetic pulse generators and a 5 VDC low-voltage channel for TTL or line-driver encoders. This flexibility matches the detector port and lets retrofit applications retain existing sensors. The inverter is optimized for Okuma BL/PREX brushless servomotors, ensuring that its parameter tables align with the motors’ inductance and thermal models. Its installation weight is limited to 5.0 kg, easing cabinet layout and reducing the load on slide-in rails. The inverter integrates through the MIV backplane, allowing the control CPU to exchange alarms, status words, and torque commands without additional field wiring. This backplane connection also centralizes communication between the inverter and the machine control while keeping signal routing separate from the motor power conductors.
