Product Description:

The VT-VRPA1-151-11/V0/0 plug-in amplifier card belongs to the VT-VRPA Electric Amplifiers series from Bosch Rexroth Indramat. It is installed in Eurocard control racks and provides regulated drive current for proportional pressure valves such as the 2FRE10 and 2FRE16. By translating low-level command signals into controlled solenoid excitation, the module stabilizes hydraulic pressure loops in presses, plastics processing machines, and other closed-loop industrial systems.

Stable operation begins with a supply rail of 24 V DC, from which the onboard electronics have a continuous power consumption of less than 35 W. The card’s power stage can deliver a maximum controlled current of 2.2 A ±10% to a valve coil. This output is pulse-width modulated at 2.5 kHz ±10% to minimize hysteresis while keeping inductive losses low. Internal reference circuitry creates a symmetrical command-channel output of ±9 V ±1%, ensuring that external potentiometers or PLC analog outputs receive a predictable load and linear span. These electrical limits establish the thermal margins and dynamic range available for precise hydraulic pressure adjustment during continuous machine operation.

Mechanical integration is aided by the Eurocard dimensions of 100 × 160 mm and a front plate height of 128.4 mm, allowing the board to fit standard 3U subracks without additional adapters. A 32-pin DIN EN 60603-2 Form D connector carries power, feedback, and command lines, while solder-side tracks maintain 5.08 mm spacing to meet industrial clearance requirements. The logic section typically draws less than 1.5 A, keeping the board below the protective 2.5 A T fuse rating and helping limit heat accumulation inside the control cabinet. The card weighs 0.15 kg, and its monitoring outputs support an external load of ±25 mA without exceeding the available backplane power capacity.