Product Description:

The VT-VSPA2-1-2X-V0-T5 is a plug-in proportional amplifier card produced by Bosch Rexroth Indramat for the VT-VSPA Proportional Amplifiers series. Installed in valve control racks, the card conditions command and feedback signals so an electrohydraulic proportional valve can follow an analog reference with stable dynamics. By providing internal ramp functions and current regulation, it allows machinery controllers to position hydraulic actuators smoothly without adding discrete electronics. This helps hydraulic axes respond consistently during speed, force, or position control tasks.

The amplifier is powered from a nominal operating voltage of 24 VDC, while protective circuitry keeps the card functional up to 35 VDC and shuts down below the 18 VDC lower limit to avoid undervoltage faults. Output stages can deliver a maximum coil current of 2.5 A, letting it drive medium-sized proportional directional or pressure valves. Despite that capability, the total power draw is limited to <50 VA, so cabinet heat dissipation stays modest. A 100 Ω current input load is provided for external command sources, and the 10 kΩ ramp input resistance separates the card from low-impedance PLC outputs while current regulation accuracy of 25 mA helps keep valve response stable.

The feedback circuit supplies an actual-value signal of ±2.5 V ±2%, and this voltage is proportional to coil current for closed-loop monitoring by the controller. For stand-alone setups, the card also generates an internal command of ±10 V ±2%, eliminating the need for an external reference source during setup. Mechanical design follows Eurocard format with dimensions of 100 × 160 mm and a weight of 0.17 kg, so it fits standard 3U subracks. All connections and test points reach the front edge through a 48-Pin DIN 41612 Form F connector, which allows front access without disturbing adjacent modules.