VT-MRPA1-151-11/V0/0 Bosch Rexroth Indramat
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MPN: R901080966
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The Bosch Rexroth Indramat VT-MRPA1-151-11/V0/0 is part of the VT-VSPA Proportional Amplifiers series. This amplifier operates at a nominal voltage of 24 VDC with a current consumption of less than 2 A and a maximum output current of 1.85 A. It is mounted on a TH 35-7.5 rail, uses 12 screw terminals for connections, and has dimensions of 40 mm width, 79 mm height, and 85.5 mm depth.
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Product Description:
The VT-MRPA1-151-11/V0/0 proportional amplifier is produced by Bosch Rexroth Indramat within the VT-VSPA Proportional Amplifiers series. Installed on a DIN rail close to hydraulic valves, the module converts a 24 VDC supply into controlled coil currents so that a motion controller can modulate pressure or flow in an industrial hydraulic circuit. Its circuitry is housed in a compact enclosure that measures 40 mm wide. The module receives command signals through screw terminals and delivers regulated output current to proportional solenoids without requiring separate power stages.
It accepts a nominal supply of 24 VDC, and operation continues at voltages as low as 18 V. Operation is cut off above 35 V to protect onboard components from excessive voltage. Under normal load, the electronics draw less than 2 A, keeping total input demand below the stated power ceiling of 24 VA. The housing carries an IP20 rating, so it is intended for closed electrical cabinets where protection against accidental finger contact is sufficient. The amplifier mounts on a TH 35-7.5 rail for secure placement inside the cabinet. Its enclosure measures 40 mm in width, 85.5 mm in depth, and 79 mm in height, allowing dense placement beside adjacent control modules while leaving room for wiring to the twelve screw terminals.
For valve actuation, the amplifier can deliver up to 1.85 A of controlled output current. Each output is excited by an internal oscillator that provides a carrier current of 10 mA per output at a frequency of 5.6 kHz. This dither helps reduce hysteresis in proportional valve spools, supporting smoother response to changing command signals. The oscillator signal has an amplitude of approximately 2 V, providing high-resolution modulation without excessive coil heating. The unit weighs 0.14 kg, so its installation does not require additional panel support hardware.
