VT 1600-31/1E
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The VT 1600-31/1E servo amplifier features an output current of ±60 mA or ±100 mA, a dither current of 3 mApp at 340 Hz, and internal control voltage ranging from 0 to ±10V. As part of the VT 1600 Servo Amplifiers series by Bosch Rexroth Indramat, it operates with a power supply voltage of ±22 to ±28V and weighs approximately 0.15 kg.
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Product Description:
Bosch Rexroth Indramat manufactures the VT 1600-31/1E. The amplifier can only work with servo valves that have an output current of ±60 mA or ±100 mA. The direct correlation between this current and the force or torque applied by the valve allows for accurate control of hydraulic or electromechanical actuators. Flexibility is given by choosing between these two current levels to match different valve sizes and operating conditions. In servo valves, the dither current (3 mApp at 340 Hz) is needed to overcome stiction or static friction. Stiction is a condition where some effort is needed to start moving from a motionless position. The valve spool is essentially kept from being static by the dither current, which adds a small high-frequency oscillation to the control signal. Even with very small amplitudes this constant oscillation ensures the valve is always ready and improves accuracy and reaction time. To properly mitigate stiction and not interfere with the main control signal, the frequency of 340 Hz was chosen.
The input signal the amplifier can accept is defined by the internal control voltage range of 0 to ±10V. This voltage signal is usually generated by a control system and is converted into the matching output current that drives the servo valve. The linear relationship between input voltage and output current ensures proportional control. This is due to the amplifier’s electrical circuitry that maintains linearity while amplifying the input voltage signal to the required current level. The electrical power required by the amplifier is determined by the power supply voltage, which is ±22 to ±28V when voltage regulators are fitted (E1) or ±15V when regulators are removed (E0). The ability to operate at different voltage levels gives installation flexibility to match different industrial power supply arrangements. Voltage regulation components in the amplifier’s internal circuitry ensure a stable and reliable working voltage even if the external power source fluctuates. The amplifier’s power consumption, which is important for the whole power distribution system, is less than 200 mA.
The internal relay functions that are used for safety interlocks or status indication are related to the relay coil voltage (22 to 28 V), relay duty cycle (1 ms), and relay coil resistance (2000 Ω nominal). The physical form factor of the amplifier is defined by the front plate measurements, which are height (3U) and width (8 HP) and the Euro card dimensions, which are 100 x 160 mm according to DIN 41 494. Installation and maintenance are made easier by these standard dimensions, which ensures compatibility with mounting solutions and industrial control cabinets. Control panels’ small and standardized form factor makes efficient use of available space, which is crucial in an industrial environment where space is often limited. Installation and handling is made easier by the weight of around 0.15 kg.
Frequently Asked Questions about VT 1600-31/1E:
Q: What is the Bosch Rexroth Indramat VT 1600-31/1E servo amplifier used for?
A: The VT 1600-31/1E servo amplifier is designed for industrial automation applications that require precise current control for servo valves. It provides stable and adjustable output currents, ensuring optimal performance in hydraulic and electromechanical systems.
Q: What are the output current options available for this servo amplifier?
A: The VT 1600-31/1E offers two selectable output current options: ±60 mA or ±100 mA. These options provide flexibility for various applications, allowing users to choose the appropriate setting based on their system's requirements.
Q: What power supply voltage does this servo amplifier require?
A: The power supply voltage depends on whether voltage regulators are installed. When installed (E1 configuration), the unit requires ±22 to ±28V. Without the regulators (E0 configuration), it operates at ±15V. This design ensures adaptability in different power environments.
Q: What are the physical dimensions of the VT 1600-31/1E?
A: The amplifier follows the Euro card form factor with dimensions of 100 x 160 mm, making it compatible with standard DIN 41 494 mounting systems. Its front plate measures 3U (5.05 inches or 128 mm) in height, with a total width of 8 HP. This standardized size allows easy integration into industrial control panels.
Q: What is the function of the dither current in this amplifier?
A: The VT 1600-31/1E includes a typical dither current of 3 mApp at 340 Hz. This feature helps prevent static friction (stiction) in servo valves by continuously oscillating the control signal, improving response time and accuracy in hydraulic control applications.
