VT-VRRA 1-527-20/V0 Bosch Rexroth Indramat
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MPN: 811405060
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The Bosch Rexroth Indramat VT-VRRA 1-527-20/V0 is part of the VT-VRPA Electric Amplifiers series and features a printed circuit board design with a 32-pin connector plug. It supports an analog signal input of 0 to 10 V, operates at 24 VDC supply voltage, and is compatible with the 4WRPH6.L-2X valve. The amplifier weighs 0.36 kg and is designed to control one solenoid.
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Product Description:
The VT-VRRA 1-527-20/V0 is an electronic amplifier card produced by Bosch Rexroth Indramat for the VT-VRPA Electric Amplifiers series. Installed in a control cabinet or rack, the module converts low-level command voltages into proportional current for a single directional valve coil, letting automated machinery modulate hydraulic flow with repeatable accuracy. Within an industrial automation loop, the board sits between the motion controller and a proportional valve, bridging digital control logic and hydraulic actuation. This arrangement allows the control system to command smooth hydraulic changes without driving the valve coil directly.
The card accepts a command signal of 0 to 10 V, so a PLC or analog motion card can vary spool position over the full operating stroke. Internal regulators shape this reference into controlled output that is powered from a dedicated 24 VDC supply, isolating the drive stage from upstream electronics. Processing is based on an analog signal path, which avoids conversion delay when fast hydraulic response is needed. Because the board is designed for a single coil, the solenoid count is 1, which simplifies adjustment of the output stage and avoids interaction between multiple channels. Field wiring terminates on a 32-pin connector plug, form F, so the card can be removed without rewiring the fixed cabinet harness.
The amplifier is matched to the proportional valve type 4WRPH6.L-2X, and its gain, dither, and ramp components are scaled so the valve can reach rated flow with minimal adjustment. Total mass is only 0.36 kg, so the module places little mechanical load on card guides and supports dense rack layouts. Its printed circuit board construction supports layered signal routing that helps keep electrical noise low in crowded cabinets. The compact board format also fits applications that need stable analog valve control in limited enclosure space.
Frequently Asked Questions about VT-VRRA 1-527-20/V0:
Q: What is the command input voltage range for the VT-VRRA 1-527-20/V0?
A: The VT-VRRA 1-527-20/V0 amplifier takes a command input signal in the range of 0 to 10 V.
Q: Which valves are compatible with the VT-VRRA 1-527-20/V0 amplifier?
A: This amplifier is designed for use with 4WRPH6.L-2X series valves.
Q: What type of electrical connector is used on the VT-VRRA 1-527-20/V0?
A: It uses a 32-pin connector plug in form F for electrical connections.
Q: What is the supply voltage requirement for the VT-VRRA 1-527-20/V0?
A: The VT-VRRA 1-527-20/V0 is powered by a 24 VDC supply voltage.
Q: How many solenoids can the VT-VRRA 1-527-20/V0 amplifier operate?
A: This model has one solenoid channel for controlling a single valve solenoid.
