Product Description:

The KMS02.1B-A018-P-D7-ET-ENH-L3-WN-FW is a near-motor servo drive from Bosch Rexroth Indramat’s KMS Electronic Drives series. As a drive that mounts close to the motor, it minimizes cable length between power electronics and the actuator, reducing electromagnetic emissions in distributed automation cells. The unit belongs to design version 1 of the series and is classified at the Basic performance level. Multi-Ethernet master communication and a Hiperface encoder interface allow the controller to exchange real-time position and torque data with higher-level PLCs while keeping wiring simple. Natural convection provides cooling, avoiding forced-air components and making the drive suitable for sealed machine zones that require an IP65 protection rating. Safe Torque Off is provided for immediate energy isolation during safety events.

Under continuous operation at a 4 kHz switching frequency, the drive supplies 5.8 A of output current, which indicates the continuous thermal load supported for connected servomotors. For transient acceleration or deceleration, it can deliver a maximum of 17.7 A, giving additional peak torque without exceeding semiconductor limits. The rated input side draws 7.3 A from the DC bus, so upstream power supplies and cabling can be sized accordingly. A regulated internal link maintains 750 V DC, providing the necessary headroom for high-speed axis control while remaining below insulation class limits. The housing has an IP65 rating, which helps protect internal components from dust and low-pressure water jets so cabinet-free mounting on moving axes is possible.

During bypass events, the unit can accommodate up to 25.0 A without triggering protective trips, and its internal electronics dissipate only 50.00 W, reducing enclosure temperature rise. Energy storage on the DC link is provided by a capacitance of 0.02 mF, which smooths intermediate-circuit voltage during regenerative cycles. With a cable length of 7.5 m, the inverter’s switching pattern produces a voltage rise of 5.00 kV/µs, a figure that is important for motor insulation qualification and EMI countermeasures, and the unit has a 42 kA short-circuit current rating for coordination with upstream protection.