VM 50/B-TC 3/PE Bosch Rexroth Indramat
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The Bosch Rexroth Indramat VM 50/B-TC 3/PE is part of the VM Amplifier Drives series. It features a 3-phase plus PE input, runs on an AC supply voltage of 380 V at 50 Hz, and has a rated current of 50 A. The drive uses a control voltage of 24 V and has a DC bus voltage of 520 V with a fault contact that opens on fault.
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Product Description:
The Bosch Rexroth Indramat VM 50/B-TC 3/PE is an amplifier drive unit in the VM Amplifier Drives series. The module conditions three-phase line power and supplies a regulated DC bus that feeds downstream servo inverters, while also providing status contacts that can be wired into machine safety circuits. By handling power conversion and basic monitoring, it simplifies the integration of high-power motion axes in automated production lines.
The power section accepts a three-phase input with PE at AC 380 V and operates on a utility frequency of 50 Hz. These lines connect to an internal terminal set that links to a heat sink, while the protective conductor diverts fault currents safely. Control wiring enters through the X31 plug, which provides 6 low-level signal pins. A stabilized control voltage of 24 V energizes the logic circuits and relay coils, and its return path can share the Faston shield connection to maintain reference potential and minimize noise. The input arrangement allows the amplifier to sit near drives without excessive cable lengths, and it separates high-energy conductors from sensitive command signals for predictable electromagnetic compatibility.
Inside the module, the rectifier and filter build a bus voltage of DC 520 V, and an undervoltage monitor trips when the level falls below 400 V to prevent drive misfires. The output path is dimensioned for a continuous current of 50 A, enabling parallel operation of several inverters from the same supply rail. Thermal supervision is implemented with a sensor in the heat sink that changes state above 100 °C. When any limit is exceeded, the fault relay opens, and the separate BTB ready relay drops, removing the run permissive to the machine controller. Because no visual indicators are fitted, system status must be read from these contacts or the host control software.
Frequently Asked Questions about VM 50/B-TC 3/PE:
Q: What is the rated current specification for the VM 50/B-TC 3/PE amplifier drive?
A: The VM 50/B-TC 3/PE amplifier drive has a rated current of 50 A.
Q: What type of input phases does the VM 50/B-TC 3/PE support?
A: This model is designed for use with a 3-phase input plus protective earth (PE).
Q: What supply voltage does the VM 50/B-TC 3/PE require for operation?
A: The VM 50/B-TC 3/PE operates at a supply voltage of AC 380 V.
Q: What is the behavior of the fault contact on the VM 50/B-TC 3/PE in a fault situation?
A: If a fault occurs, the fault contact on the VM 50/B-TC 3/PE will open.
Q: What is the maximum allowed heatsink temperature for the VM 50/B-TC 3/PE drive?
A: The heatsink on this drive is limited to temperatures over 100 °C.
