8EI8X8HWD10.0400-1 by B & R Automation

The 8EI8X8HWD10.0400-1 is a servo drive module manufactured by B&R Automation and belongs to the 8EI Servo Drives series. It regulates two motor axes inside distributed automation cabinets, providing controlled current output and a safety-rated torque-off channel for each motor. By converting a three-phase mains supply into conditioned AC, the unit executes position, velocity, and torque commands that originate from the PLC layer. Because both axes are handled in the same enclosure, shared cabinet space can be used efficiently in multi-axis machines. The module is intended for systems where accurate speed regulation and repeatable positioning are required across separate motor channels.

Electrically, the drive accepts a supply of 3x 200-480 VAC, covering common low-voltage industrial grids. With a continuous current rating of 8.8 Aeff per axis, the module sustains torque production in mid-frame synchronous motors without overheating. An integrated internal braking resistor dissipates regenerative energy during deceleration and often removes the need for an external resistor. For functional safety, the device incorporates hardwired STO safety technology with an encoder, cutting motor power within a defined reaction time when the external safety circuit is triggered. Its mechanical interface uses wall mounting, so the housing fastens directly to the cabinet plate and uses the enclosure as a thermal path. This layout supports dense cabinet installation while keeping power and safety functions in the same unit.

The model is delivered as a 2-axis module, so one housing controls two servo channels from the same mounting location. It is identified as an ACOPOS P3 8EI servo drive, which places it within B&R's modular servo platform for motion control and diagnostics. Electrical terminations use connector set 1 (1-row) for power and encoder connections, keeping the interface compact. The compact connection format helps keep encoder and power routing organized at the drive face. The unit uses the standard module option and does not include a plug-in module or front cover.