VT 1107B-23
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The VT 1107B-23 servo amplifier operates within a voltage range of 21V to 35V, consumes approximately 1.2A current, and adheres to IP20 protection standards. Built as part of the VT Servo Amplifiers series by Bosch Rexroth Indramat, it has a compact design with dimensions of 40 x 79 x 85.5 mm and weighs only 0.16 kg.
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Product Description:
The Bosch Rexroth Indramat manufactured the VT 1107B-23 servo amplifier. It is designed to run on a pretty standard DC voltage range: between 21 and 35 volts. That nominal 24-volt DC is where the amplifier feels most at home—and it can handle variations of up to 40% above that or 10% below. That flexibility ensures the amplifier keeps working as expected, even when it encounters the typical ups and downs of industrial power distribution networks. What really matters is that those internal semiconductors—like bipolar junction transistors, MOSFETs and operational amplifiers—get the stable voltage they need to modulate signal amplification, switching and control tasks smoothly. If the voltage deviates too far from that range, it can cause problems with the charge carrier dynamics in those semiconductors. That leads to non-linear behavior, timing errors or thermal instability—and all of those things degrade the overall performance of the servo control system. The power consumption of the VT 1107B-23 is actually quite manageable. You can expect a peak apparent power draw of 25 VA and a steady-state current demand of about 1.2 amps.
The 1.2 amps is important not just for choosing the right power supply but also for understanding the thermal loading within the amplifier's internal conductors and PCB traces. High currents can cause junction temperatures to rise, increase losses and reduce component lifespan. In servo motor control, that current level also affects the electromagnetic torque generated in the stator windings. So, precise current regulation is essential for predictable acceleration profiles and minimizing overshoot in position control applications. The amplifier's analog signal interface is based on a differential input scheme that accepts ±10-volt command values. It's got an input resistance of 20 kilohms to stop significant current draw from upstream controllers. That differential configuration is vital in environments with a lot of electromagnetic interference. It cancels out noise that appears symmetrically on both input lines, preserving the integrity of the control signal.
The output interface includes a signal-switching circuit capable of delivering up to +6 volts across a 10-kilohm load. That's a status indicator or feedback signal to other nodes in the automation architecture. That voltage level aligns with conventional TTL or CMOS logic thresholds, so you can integrate it directly with digital control systems while keeping signal power dissipation to a minimum. Inside the VT 1107B-23, the clock pulse frequency runs between 170 and 200 Hz. That's with a permitted deviation of ±15%, which governs the sampling and execution rate of its control algorithms. That frequency parameter affects the control loop response time, noise rejection capability and overall bandwidth of the amplifier. In practical terms, a higher clock frequency supports a faster transient response. That lets the servo system react quickly to changes in command signals or disturbances.
Frequently Asked Questions about VT 1107B-23:
Q: How much power does the VT 1107B-23 consume during operation?
A: The amplifier has a maximum power consumption of 25 VA and draws approximately 1.2 A of current under standard operating conditions. This makes it energy-efficient while still capable of delivering precise control for servo motors in industrial environments.
Q: What kind of electrical input signals does the amplifier accept?
A: It accepts command values ranging from 0 to ±10 V through a differential input, with an input resistance of approximately 20 kΩ. It also includes a signal switching output of 0 to +6 V with a load resistance near 10 kΩ, which is standard for interfacing with industrial control systems.
Q: What are the mounting and connection options for the VT 1107B-23?
A: This unit is designed for quick installation using a standard carrier rail (type TH 35–7.5 according to EN 60715). It features 12 screw terminals, providing reliable and secure electrical connections, which simplifies integration with other automation components.
Q: How does the VT 1107B-23 handle industrial operating environments?
A: It has an IP20 protection rating according to EN 60529, which means it's protected against solid objects over 12 mm but not against liquids. It operates safely within a temperature range of 0°C to +50°C, making it suitable for most indoor industrial applications.
Q: What are the physical specifications of the VT 1107B-23 servo amplifier?
A: The amplifier is very compact, measuring just 40 mm wide, 79 mm high, and 85.5 mm deep. Weighing only 0.16 kg, it’s ideal for systems where space and weight are critical factors. Despite its small size, it delivers reliable performance in demanding applications.
