VT-VSPA2-525-10/V0/RTP Bosch Rexroth Indramat
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MPN: 811405080
The Bosch Rexroth Indramat VT-VSPA2-525-10/V0/RTP is a proportional amplifier card in the VT-VSPA Proportional Amplifiers series, featuring a Eurocard form factor with a front plate and measuring 100 x 160 x 35 mm. It offers a supply voltage of 24 VDC, one-channel current up to 1.5 A, and a maximum two-channel power of 65 VA. The amplifier uses a DIN 41612-F32 connector and has a solenoid rating of 2.5 A.
Internal Product Review
The VT-VSPA2-525-10/V0/RTP is a Bosch Rexroth Indramat proportional amplifier with a clocked output stage and 24 VDC supply voltage. Fast 50 ms positioning time and 1.5 A maximum one-channel current support precise, responsive solenoid control. The Eurocard form factor with front plate and DIN 41612-F32 connector support straightforward cabinet integration, making the amplifier a strong choice for stable proportional control.
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Product Description:
The VT-VSPA2-525-10/V0/RTP is a plug-in proportional amplifier card from Bosch Rexroth Indramat that belongs to the VT-VSPA Proportional Amplifiers series. Designed for industrial automation, the board conditions command signals and delivers controlled current to proportional solenoid valves, allowing precise positioning and pressure regulation in electrohydraulic systems. Using the Eurocard form factor, it slots directly into standardized 19-inch control racks used on presses, test rigs, and other motion platforms.
It operates from a supply voltage of 24 VDC, a level common to machine control cabinets, so no dedicated power converter is required. For single-axis operation, the output stage can deliver a maximum current of 1.5 A and a maximum apparent power of 35 VA to a connected valve while maintaining linear control. Connections to the controller backplane are made through a DIN 41612-F32 plug, and a front plate marked 7 TE preserves slot spacing in the rack. Internally, the amplifier relies on a clocked output stage, meaning the solenoid current is generated with high-frequency pulse modulation that reduces thermal loss in the drivers. Manual adjustments are provided by a 1 kΩ signal potentiometer, and auxiliary references of +10 V at 50 mA and -10 V at 20 mA are available for external setpoint circuits. The card measures 100 × 160 × 35 mm, allowing it to fit the designated Eurocard rack space without requiring a separate enclosure.
With both channels active, the amplifier supplies a maximum combined current of 2.8 A, and its output is limited to a maximum apparent power of 65 VA to protect parallel solenoids against thermal overload. The internal loop settles at its setpoint within 50 ms, allowing precise valve shifts during high-speed hydraulic cycles. The board weighs only 0.25 kg, reducing mechanical strain on card rails and rack supports. Integrated temperature monitoring keeps the driver transistors within safe operating limits during continuous duty. The compact board format also leaves the front controls accessible while the amplifier remains installed in the rack.
