VT-VRPA2-2-11/V0/T5
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The VT-VRPA2-2-11/V0/T5 electric amplifier operates on 24 VDC with a tolerance range and includes analog inputs with a resistance exceeding 100 kΩ and digital outputs delivering over 16 V at 50 mA. Part of the VT-VRPA Electric Amplifiers series by Bosch Rexroth Indramat, it features a compact Euro-card format and weighs 0.15 kg.
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Product Description:
Bosch Rexroth Indramat manufactures the VT-VRPA2-2-11/V0/T5 amplifier. This amplifier is specified to 24 VDC with a +40%/-20% tolerance. For industrial use where the voltage is variable, this range (up to 35 V and down to 18 V) is critical. The amplifier can withstand changes in the power supply because it can operate within this range, will not be damaged, and will function properly. Less than 7 VAS of power is used, which is important for cost and heat reduction. Design your power distribution systems to supply the amplifier without overloading the circuits by the current usage, which is less than 0.3 A. In a large industrial automation setup, these are important for the device’s stability and performance.
High input resistance command values are expected to be received by the analog inputs. Command values 1 to 4 can tolerate input resistances greater than 100 kΩ, and 0 to ±10 V. This high resistance ensures accurate signal transmission and reduces the loading on the signal source. With input resistance greater than 50 kΩ, command value 5 (differential input) has the same advantages as differential signal inputs. Command value 6 (current input) supports 4 to 20 mA with a load resistance of 100 Ω and can use current loop signals (less noisy and less vulnerable to voltage dips over long distances). The analog outputs have ±2% accuracy in voltage (±10 V) and current (4 to 20 mA). The voltage output can drive up to 2 mA, and the current output can drive up to 500 Ω. The amplifier can swap the zero point for the current input and output.
The VT-VRPA2-2-11/V0/T5 provides important status data through its digital outputs. The amplifier’s operational status is indicated by the “Ramp Ready” and “Ready for Operation” outputs, which produce more than 16 V at 50 mA. With a 10 kΩ load, the output falls below 1 V if the amplifier is defective, clearly indicating the problem. This is important for system monitoring and troubleshooting, quick intervention and to prevent equipment damage. Exact control of signal ramp rates is possible through the external ramp time input, which takes 0 to +10 V over a 10 kΩ resistor. The amplitude attenuator (0 to 110%), ramp timings (20 ms to 5 s, switchable to 0.2 to 50 s), step level (0 to 50%), zero adjustments (±30%) and command values (0 to 110%) provides a lot of flexibility to configure the amplifier to your specific application.
Frequently Asked Questions about VT-VRPA2-2-11/V0/T5:
Q: What is the VT-VRPA2-2-11/V0/T5, and what is its primary function?
A: The VT-VRPA2-2-11/V0/T5 is an electric amplifier from Bosch Rexroth Indramat's VT-VRPA series. It is designed to regulate and control electrical signals for industrial automation applications. It operates on a 24 VDC power supply with a tolerance of +40%/-20% and features both analog and digital outputs, making it suitable for precision control tasks.
Q: What is the input resistance of the analog command values?
A: The analog inputs for command values 1 to 4 have an input resistance greater than 100 kΩ, while the differential input (command value 5) has an input resistance greater than 50 kΩ. The current input (command value 6) supports 4 to 20 mA with a load resistance of 100 Ω. These values ensure minimal signal loss and stable operation.
Q: What are the key digital output features of this amplifier?
A: The VT-VRPA2-2-11/V0/T5 includes two digital outputs: a "Ramp Ready" output and a "Ready for Operation" output. Each delivers over 16 V at 50 mA when active. If a fault occurs, the output drops below 1 V with a 10 kΩ load, providing a clear indication of system status and ensuring safe operation.
Q: How does the amplifier handle ramp time adjustments?
A: The amplifier features an external ramp time input that allows precise control over signal adjustments. Ramp times can be set between 20 ms and 5 seconds by default, but this range can be switched to 0.2 seconds up to 50 seconds using jumper J3. This flexibility enables smooth signal transitions and reduces sudden load changes.
Q: What are the dimensions and weight of the VT-VRPA2-2-11/V0/T5?
A: The amplifier follows the standard Euro-card format with dimensions of 100 x 160 mm, conforming to DIN 41494. It has a compact design and weighs only 0.15 kg, making it easy to integrate into various industrial systems without adding significant weight or requiring extensive space.
