VT-VSPA1-1-12 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat VT-VSPA1-1-12 is part of the VT-VSPA Proportional Amplifiers series and operates with an input voltage range of 22 to 35 VDC. It features a maximum power consumption of 50 VA, a 2.5 Amp slow-blow fuse, and uses a 32-pin DIN 41612 connector. The amplifier measures 160 mm in length, 100 mm in width, and weighs 0.1 kg.
Internal Product Review
The VT-VSPA1-1-12 is a Bosch Rexroth Indramat proportional amplifier with 24 VDC operating voltage and a 32-pin DIN 41612 form D connector. Stable command handling and a controlled 50 VA maximum power draw make this amplifier a strong fit for hydraulic control panels, with the 22 to 35 V supply range standing out as a practical electrical margin.
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Product Description:
The VT-VSPA1-1-12 is a plug-in proportional amplifier card designed by Bosch Rexroth Indramat for the VT-VSPA Proportional Amplifiers series. Installed in a Eurocard rack, the board conditions analog set-point signals and supplies a controlled current to proportional hydraulic valves, allowing repeatable position or pressure control inside industrial automation systems. By converting low-level control voltages from a PLC into a stabilized output for the valve solenoid, the amplifier becomes the interface that links electronic command logic with fluid-power actuators. This arrangement is useful in hydraulic systems that need smooth modulation rather than simple on-and-off valve switching.
The card draws its logic and power supply from a nominal 24 VDC bus, and continuous operation is maintained as long as the supply stays above the 22 V lower threshold and below the 35 V upper limit. Internal circuitry never exceeds a peak demand of 50 VA, so cabinet power allocation remains manageable during normal use. To protect upstream wiring, the board includes a 2.5 A slow-blow fuse that opens only on sustained overloads, preventing nuisance trips during inrush events. External wiring terminates on a rugged 32-pin DIN 41612 form D backplane connector, which provides keyed alignment and helps shield low-level inputs from electrical noise inside the enclosure. The backplane connection also supports clean installation in compatible racks without requiring separate terminal hardware on the card itself.
The command stage accepts two separate reference channels: input 1 saturates at +9 V, while input 2 accepts up to +10 V. Each channel is referenced against the card’s internal ±9 V precision source to help maintain linear valve response during control changes. Physical dimensions of 160 × 100 mm let the board slide into standardized guide rails, and the weight of 0.1 kg keeps handling simple during installation. Reliable function is maintained between 0 °C and a maximum ambient temperature of 50 °C. Outside this range, the amplifier should be de-energized and stored in conditions that avoid unnecessary thermal stress.
