Product Overview
The 12F5A1D-3A0A is a KEB drive from the F5 Combivert Axis Drive Series. It is a panel-mount unit built for three-phase 400 VAC operation and delivers 4 kW of motor power. KEB designed this drive for industrial motion and process control, and it carries a 24V DC power supply along with sensor inputs for thermocouples and RTDs. A 4-digit LED display gives operators local feedback, while relay and 4-20 mA outputs support control-loop integration. Note that the manufacturer has discontinued this model, so availability depends on remaining stock and specialist suppliers.
Technical Specifications
Power and Motor Ratings
The drive runs on a three-phase 400 VAC supply and provides 4 kW of output power. It is rated at 6.6 kVA with an 8 kHz switching frequency. These figures suit moderate-duty motor control in industrial settings where stable speed and torque matter.
Control and I/O
A PID control type lets the drive manage closed-loop processes such as temperature or flow regulation. Sensor inputs accept thermocouples and RTDs, and the measured range spans -50°C to 150°C with 0.1°C resolution. Outputs include a relay contact and a 4-20 mA analog signal. The 24V DC power supply feeds the control electronics.
Communication and Display
RS485 Modbus RTU handles serial communication, which allows integration with supervisory systems and PLC networks. A 4-digit LED display shows parameters and fault codes at the panel. The unit mounts on a panel and reaches 98% efficiency, with a maximum heat sink temperature of 90°C (194°F).
Where This Drive Fits
Process Skids and Pump Control
Oil and gas process skids often need closed-loop control of pumps or fans. The PID function and RTD input on the 12F5A1D-3A0A support temperature-based regulation without a separate controller.
Replacement in Existing F5 Systems
Because the F5 Combivert platform is well known, this drive often serves as a drop-in replacement when an existing unit fails. Matching the 400 VAC, 4 kW rating and the RS485 Modbus RTU interface keeps commissioning straightforward.
Panel-Mount Automation Cabinets
With panel mounting and a 4-digit LED display, the drive suits compact cabinets where operators need local visibility. The 24V DC supply and relay output simplify wiring into existing control panels.
Integration Notes
RS485 Modbus RTU is a serial protocol, so wiring into a modern Ethernet-based network may require an external gateway or protocol converter. Confirm cable types, termination, and any gateway needs with your supplier before installation. The 4-20 mA output can feed analog inputs on a PLC or recorder, while the relay output handles simple interlock or alarm signals.
Buyer’s Checklist
Before you commit, verify the motor’s voltage and power match the 400 VAC and 4 kW ratings. Check that your control system can use RS485 Modbus RTU, or plan for a gateway. Confirm the sensor type you intend to connect is a thermocouple or RTD within the -50°C to 150°C range. Because KEB has discontinued this model, confirm stock and lead time with Oil AutoTech before ordering. Their team can help match the drive to your application and arrange fast dispatch, worldwide.
Reliability and Maintenance
Keep the heat sink clear of dust so it can stay below the 90°C maximum. Inspect panel connections periodically and check the LED display for fault codes during routine rounds. The 98% efficiency rating means low waste heat, which helps cabinet thermal management. For a discontinued drive, keeping a spare on hand reduces downtime risk. Contact Oil AutoTech today for pricing and availability.
