8I74T400400.0P-000
The B & R Automation 8I74T400400.0P-000 inverter is a robust member of the 8I7 ACOPOS Inverters series designed for precision industrial motor control. This frequency inverter delivers a nominal motor power of 4 kW and handles three-phase input voltages ranging from 380 VAC to 500 VAC, making it suitable for a wide variety of heavy-duty applications. Its galvanized steel housing, with a coating thickness of 50 μm and compliance to DIN EN ISO 1461, ensures durability in harsh environments. At a compact size of 60 × 317 × 245 mm and weighing 2.176 kg, the unit balances high power density with space-saving installation. Integrated safety and EMI management features streamline system design and reduce ancillary component requirements.
The technical architecture of the 8I74T400400.0P-000 showcases a nominal output current of 9.5 A with an overload capacity up to 14.3 A for 60 seconds. It supports an output frequency span from 0.1 Hz to 599 Hz with an internal clock frequency of 4 kHz. The drive incorporates six 24 VDC digital inputs (7 mA, 3.5 kΩ) and two relay outputs rated 5 A at 250 VAC/30 VDC, alongside a dedicated Safe Torque Off (STO) input for functional safety. Peak electrical characteristics include a maximum inrush current of 10 A and a maximum assumed short-circuit current of 5 kA. Thermal and mechanical parameters feature a tensile strength of 350 MPa, thickness of 4 mm, and a hole diameter of 14 mm across its four mounting holes in a 40 mm width steel profile.
Operationally, the inverter dissipates 125 W at nominal load while driving motors over cable runs up to 50 m (shielded). It maintains full performance in ambient temperatures from -10 °C to 50 °C without derating, applying a 1%/100 m elevation derating factor above 1000 m. Protection is rated IP20 per EN 60529, safeguarding internal electronics against solid intrusion. The built-in EMC filter and brake chopper, capable of providing up to 170% nominal motor torque for dynamic stopping, minimize external filtration needs and reduce braking times. Sample times for digital inputs are precise at 8 ms ±0.7 ms, supporting tight control loops and responsive safety reactions.
System integration leverages the POWERLINK interface type 2 for high-speed communication in distributed architectures. Its galvanized surface treatment and wide temperature range of -40 °C to +120 °C allow deployment in extreme industrial climates, from manufacturing floors to outdoor installations. The inverter’s compatibility with standard motor cables and safety circuits makes it an ideal solution for conveyor systems, packaging machinery, and process automation where reliable torque control and functional safety are essential.
