VT 11131-12a Bosch Rexroth Indramat
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The Bosch Rexroth Indramat VT 11131-12a is part of the VT Servo Amplifiers series and operates on a voltage of 24 VDC with a tolerance of +40% / -10%. The unit's power consumption is approximately 30 VA, with a current consumption below 1.3 A. It measures 40mm by 79mm by 85.5mm and weighs just 0.16 kg.
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Product Description:
Bosch Rexroth Indramat manufactured the VT 11131-12a servo amplifier. Although the VT 11131-12a servo amplifier is designed to work with a wide voltage range of 21 V to 35 V, it runs on a nominal 24 V DC. With a voltage tolerance of +40% to -10%, this is a pretty wide range and means it’s designed for unstable power conditions. Transient voltage dips and spikes caused by inductive loads or shifting network conditions are common in heavy-duty automation setups. The internal power regulation circuitry is very robust so that the device can run without an external power stabilizer. This means continuous automation operation without control failure under varying power conditions and more system uptime. The power profile of the amplifier with a peak current of less than 1.3 A and a total consumption of around 30 VA is also essential. Although perceived power, a key parameter for AC-to-DC conversion, is reflected in the VA rating, the low current is what really matters. A lower current means less conductor heating and more energy efficiency because, in terms of Joule heating, the power loss across conductors grows with the square of the current (P_loss = I²R).
The VT 11131-12a is mechanically designed to be mounted in small automation systems. Its 40 mm x 79 mm x 85.5 mm size and 0.16 kg weight make it perfect for high-density mounting on DIN rails that meet EN 60715 (TH 35–7.5) requirements. Because of these dimensions, it can be used in applications like mobile automation units or modular manufacturing lines where space is critical. During deployment or maintenance, the lightweight design speeds up installation and reduces physical stress on mounting brackets. Overall, industrial control systems’ scalability and maintainability are supported by their physical compactness and ease of installation, especially when many units are mounted in a small area.
A clock-pulse frequency input range of 170–200 Hz (±15%), an analog command voltage of ±10 V and an input impedance more significant than 50 kΩ define the amplifier’s control logic from the signal interface perspective. In analog transmission lines, the high impedance keeps the signal accurate and clean by reducing the load on upstream controllers. The ±10 V range is compatible with current and old motion controllers as it’s a widely recognized industry standard. The amplifier can stay in sync with the overall control system timing architecture by accepting clock-pulse frequencies within a defined band. With the ramp time adjustable between 50 ms and 5 seconds, these characteristics and the amplifier can provide fast dynamic response and seamless transitions when needed.
