Product Description:

The VT-VSPA1-11-10/V0/0 is a plug-in proportional amplifier produced by Bosch Rexroth Indramat within the VT-VSPA Proportional Amplifiers series. Housed on a Eurocard, the module translates PLC or analog setpoints into controlled coil current, letting hydraulic proportional valves follow pressure or flow commands with repeatable accuracy in automated presses, test rigs, and mobile machinery. By providing local signal conditioning, it offloads high-frequency current control from the central motion controller and adjusts valve performance directly at the machine.

Electrical power is drawn from a nominal 24 VDC rail, with permissible excursions between 18 and 35 V so that machine power fluctuations do not interrupt valve control. The board occupies a compact footprint of 100 x 160 mm and has a normal current draw below 2 A, limiting the heat generated inside the cabinet. Command inputs are accepted as a differential voltage up to +10 V, as a current signal up to 20 mA, or as an external ramp signal limited to +5 V, allowing the host controller to tailor acceleration profiles. The output stage can supply up to 1.9 A to the solenoid. A 2 A medium time-delay fuse on the card protects the drive electronics and upstream wiring from excessive current.

Signal and power lines reach the board through a 48-pin DIN 41612 Design F connector that is compatible with standard backplanes. An internal reference supply delivers +10 V ±2% at up to 25 mA for sensor excitation, simplifying transducer wiring. The assembly weighs 0.15 kg, which reduces the load placed on the card rack and its supporting hardware. It sustains rated operation at ambient temperatures up to 50 °C without forced cooling. The standardized connector allows signal, supply, and solenoid wiring to remain organized within the backplane instead of requiring separate connections at the front of the board.