VM60/EB-TA Bosch Rexroth Indramat
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The Bosch Rexroth Indramat VM60/EB-TA is part of the VM Amplifier Drives series and features a rated current of 60 Amps at 45 degrees Celsius and a peak current of 150 Amps. Operating on a 3 x 400 VAC mains supply, it offers a continuous braking power of 1.0 kW and requires a blower supply of 24 VDC with a current of 100 milliamps. This drive supports a maximum cabinet air temperature of 55 degrees Celsius and has a power loss of 150 Watts.
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Product Description:
The VM60/EB-TA is an amplifier drive module produced by Bosch Rexroth Indramat for the VM Amplifier Drives series. It is intended for panel-mounted power conversion, where it connects the plant’s three-phase supply to servo axes that require rapid energy exchange during braking and acceleration. The module maintains regulated auxiliary power rails for its interface and analog electronics. Forced-air cooling removes heat from the power components, supporting stable operation when several motion channels are active in an industrial automation system.
The drive connects to a nominal mains supply of 3 × 400 VAC and provides a rated output current of 60 A at a cabinet air temperature of 45 °C. During short duty peaks, the current can rise to 150 A. The power stage can also tolerate extreme current transients of up to 850 A without device damage. Mechanical energy returned by decelerating motors is continuously absorbed at 1.0 kW through the integrated braking circuit. A +5 V logic rail supplies the interface electronics, while a -15 V auxiliary rail powers analog control stages. When the cabinet temperature reaches 55 °C, the rated current is reduced to 30 A to protect the semiconductor junctions. Operation above this temperature requires additional external cooling.
Forced ventilation delivers 80 m³/h of airflow through the heat sink fins. The blower draws 100 mA from a 24 VDC supply. The cabinet must provide 100 mm of vertical clearance so that air can move freely through the cooling path. Total power dissipated by the chassis does not exceed 150 W, which must be considered when arranging cabinet ventilation. The busbar screws require a tightening torque of 3.7 Nm to maintain secure electrical connections. The reset signal must remain active for at least 20 ms to provide a clean restart after a fault or interruption. Correct busbar spacing must also be maintained to prevent interference between adjacent conductors and preserve the required electrical clearances.
