VT 11131-12a
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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.
Frequently Asked Questions about VT 11131-12a:
Q: What is the power and current consumption of the VT 11131-12a unit?
A: The amplifier consumes approximately 30 VA of power and draws less than 1.3 A of current during operation. Its low power and current requirements contribute to higher energy efficiency and minimal heat generation, reducing stress on the electrical infrastructure.
Q: What are the physical dimensions and weight of the VT 11131-12a?
A: The unit measures 40 mm in width, 79 mm in height, and 85.5 mm in depth. It weighs only 0.16 kg, making it a compact and lightweight option for tight spaces and distributed automation systems where space efficiency is crucial.
Q: What input signal specifications does the servo amplifier support?
A: The amplifier accepts a command input voltage ranging from 0 to ±10 V, with an input impedance greater than 50 kΩ. This allows it to work well with various signal sources in control systems, maintaining accuracy and stability in motion control applications.
Q: How adjustable is the ramp time and what is the significance of this feature?
A: The ramp time can be adjusted from approximately 50 milliseconds to 5 seconds. This feature helps in controlling acceleration and deceleration smoothly, reducing mechanical stress and improving precision in positioning and motion sequences.
Q: What kind of installation and connection options are provided by the VT 11131-12a?
A: The unit includes 12 screw terminals for straightforward wiring and is compatible with TH 35–7.5 carrier rail mounting per EN 60715 standards. This simplifies installation, ensures secure electrical connections, and supports standardized industrial setup protocols.
