VT-MRPA1-1-10/V0/0 Bosch Rexroth Indramat
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MPN: R901094750
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The Bosch Rexroth Indramat VT-MRPA1-1-10/V0/0 is a proportional amplifier in the VT-VSPA Proportional Amplifiers series, weighing 0.14 kilograms and measuring 40 x 79 x 85.5 millimeters. It operates at 24 VDC with a maximum output current of 1.85 Amps and features IP20 protection class. The device includes 12 screw terminals for connection and supports an oscillator frequency of 5.6 kHz.
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Product Description:
The VT-MRPA1-1-10/V0/0 is a proportional amplifier card produced by Bosch Rexroth Indramat for the VT-VSPA Proportional Amplifiers series. Mounted on a DIN rail inside a control cabinet, it translates a reference signal from a PLC or analog controller into a controlled current that drives hydraulic directional or pressure valves, enabling closed-loop motion or force regulation in industrial automation. Its compact form allows several cards to be placed side by side when multiple axes must be managed in the same panel. This arrangement conserves cabinet space while keeping the individual amplifier channels accessible for wiring and adjustment.
Electrical operation centers on a nominal supply of 24 VDC; the circuitry remains functional down to the 18 V lower limit and up to 35 V on machine power buses. The enable input accepts at least 8.5 V to switch the output on and deactivates if the level falls below 6.5 V, preventing false toggling around the threshold. Once enabled, the power stage supplies up to 1.85 A to the valve coil, while the card itself draws less than 2 A and consumes under 24 VA. A command channel with more than 50 kΩ of resistance protects upstream analog outputs from loading effects. Wiring is completed through twelve screw terminals arranged along the front edge for straightforward installation and access inside the cabinet.
The internal ramp generator allows the current rise or decay time to be extended to 5 s for gentle actuator movement or reduced to 20 ms when fast positioning is required. Pulse-width modulation occurs at a carrier frequency of 5.6 kHz ±10%, providing controlled current delivery to the connected hydraulic valve coil. The card carries an IP20 protection rating, so it must be installed inside an enclosure and does not require additional sealing under suitable cabinet conditions. Its physical dimensions are 40 × 79 × 85.5 mm, allowing the card to fit into compact control assemblies. A weight of 0.14 kg adds little mass to the mounting rail, while the compact housing supports dense placement of multiple amplifier channels.
