VT 16000-2X-151 by Bosch Rexroth Indramat

The VT 16000-2X-151 is a plug-in servo amplifier card produced by Bosch Rexroth Indramat for the VT 1600 Servo Amplifiers series. It is installed in hydraulic control racks, where it conditions command signals and supplies regulated current to proportional pressure-reducing valves. The card supports the 2FRE 10 and 2FRE 16 valve models, allowing machine controllers to maintain stable line pressure in automated presses, test stands, and metal-forming equipment.

The electronics draw a nominal supply of 24 VDC (+40%/-5%), and undervoltage shutdown begins at 22 V. The circuitry tolerates surges up to 35 V. Typical current consumption is limited to <1.5 A, producing overall power usage below 35 W, while a 2.5 A time-delay fuse protects upstream wiring from short-circuit faults. A pulse-width-modulated oscillator clocks the output stage at 2.5 kHz ±10%, allowing precise control of the magnetic force in the valve solenoid. Internally, the card generates a regulated ±9 V reference with a tolerance of ±1% to supply its analog processor and feedback network, maintaining consistent gain across changes in temperature and load. The amplifier is designed for a solenoid resistance of 10 ? and delivers its rated setpoint without exceeding the thermal or magnetic limits of the valve coil.

The Eurocard-format board measures 100 × 160 mm and occupies 5.08 mm of rack width, leaving adjacent slots accessible. Its front plate has a height of 128.4 mm and aligns with standard 3U subracks. All control and power leads enter through a 32-pin blade connector compliant with DIN EN 60603-2, form D, allowing the card to be removed without disconnecting individual conductors. The closed-loop output can reach 2.2 A ±10%, matching the current demand of the intended valves and supporting linear force across their full stroke. The card weighs only 0.15 kg, placing minimal strain on the card guides and preserving airflow through the rack.