8400 motec/protec — decentralised frequency converters 0.37–7.5 kW

8400 motec/protec — decentralised frequency converters 0.37–7.5 kW

Country: Germany · Model: 8400 motec / 8400 protec

The decentralised frequency converters 8400 motec for 0.37–7.5 kW and 8400 protec for 0.75–7.5 kW are installed outside the control cabinet, on the motor or on the wall next to the machine. The supply is 3×400 V or 3×480 V, and the enclosure is IP65. They are used for travel drives and conveyors in intralogistics, pumps and fans.

Power: 8400 motec: 0.37–7.5 kW; 8400 protec: 0.75–7.5 kW
Mains: 3×400 V, 3×480 V
Mounting: on the motor or on the wall
Inputs/outputs: motec: 1 digital input, 2/5/8 digital outputs, 1 analogue input; protec: 4–6 digital inputs, 0–2 digital outputs, 1 analogue input

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Technical specifications

Power	8400 motec: 0.37–7.5 kW; 8400 protec: 0.75–7.5 kW
Mains	3×400 V, 3×480 V
Mounting	on the motor or on the wall
Inputs/outputs	motec: 1 digital input, 2/5/8 digital outputs, 1 analogue input; protec: 4–6 digital inputs, 0–2 digital outputs, 1 analogue input

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026.

Description

Placing the converter near the motor shortens the motor cables, and a complex machine is easier to split into modules. Both models are connected with plugs on the 'plug and drive' principle, which simplifies installation and commissioning. 8400 motec is mounted on the motor or on the wall, and a maintenance switch is provided for the wall version. The enclosure is IP65, and IP54 with the switch unit. Switches and potentiometers on the unit set the configuration, speed and acceleration time. The motec inputs and outputs include 1 digital input, 2, 5 or 8 digital outputs depending on the version, 1 analogue input and 0–2 analogue outputs, plus a changeover relay and motor temperature monitoring. 8400 protec is intended for wall mounting, has an IP65 enclosure, an LED display, 4 or 6 digital inputs, 0 or 2 digital outputs, 1 analogue input and a 3×400/480 V supply. Both models meet the requirements of the Ecodesign Directive and the EN IEC 61800-9-2 standard.

How to choose

The choice starts with the mounting place. If the converter sits on the motor or next to it and a maintenance switch is needed, motec is used, and for wall mounting next to the machine with a display and from 0.75 kW, protec is suitable. Next look at the industrial network, because motec supports AS-Interface, EtherCAT and POWERLINK, while protec supports only CANopen, EtherNet/IP, PROFIBUS and PROFINET. 8400 motec was also supplied as part of g500 geared motors with m500 motors. For new projects the manufacturer offers the successors i550 motec, i650 motec and i550 protec, and the series remains relevant for servicing existing lines. For a cabinet at 0.25–45 kW, look at 8400 BaseLine, StateLine, HighLine and TopLine.

Request a price and lead time

8400 motec/protec — decentralised frequency converters 0.37–7.5 kW. We reply within one business day.

Or email office@usk.ua or call +38 (044) 339-50-20.

FAQ

What is the difference between 8400 motec and 8400 protec?

motec is mounted on the motor or on the wall, with a power of 0.37–7.5 kW. protec is intended for the wall, with a power of 0.75–7.5 kW, and has an LED display.

What protection degree does 8400 motec have?

The enclosure is IP65, and IP54 with the switch unit.

What is the supply voltage of 8400 motec/protec converters?

3×400 V or 3×480 V.

Which industrial networks does 8400 protec support?

CANopen, EtherNet/IP, PROFIBUS and PROFINET. For EtherCAT, POWERLINK or AS-Interface you need 8400 motec.