Product Description:

The VT 3000-3X-ES-E61-A204-U169 is an analog amplifier card produced by Bosch Rexroth Indramat within the VT 3000 Analog Amplifiers series. It is installed in a control rack. The board takes differential command voltages from a motion controller and supplies regulated current to a proportional solenoid, providing the drive element needed in industrial automation loops that require accurate force or position trimming.

The card occupies a Eurocard footprint of 100 x 160 mm and mates with a 32-pin strip built to DIN 41612 Form D, simplifying plug-in installation in multi-axis racks. Its supply line is centered on 24 VDC (+60%/-5%), yet the design keeps the circuit active down to the 22 V lower limit and protects devices up to the 39 V ceiling. Internally, differential inputs present an impedance of 100 kΩ, so the upstream controller is not heavily loaded when issuing the ±9 V commands on channels 1 through 4 or the ±6 V reference on channel 5. The amplifier converts those references into a continuous coil drive of 800 mA across a nominal coil resistance of 19.5 Ω, producing a magnetic force that tracks the input signal. Average current draw from the rack stays below 1 A, and a 2.5 A slow-blow fuse provides circuit protection.

To maintain stable dynamic behavior, the modulator imposes a carrier frequency of 170 Hz with a tolerance of ±10%. A separate bias network supplies 20 mA with a tolerance of ±25% so the connected valve reaches its null position before command inputs are applied. Total energy demand remains below 50 VA, allowing dense packing of several cards without overloading the cabinet power supply. Operational limits are enforced through voltage monitoring and the specified current consumption, while thermal stress is minimized by the lightweight construction. The board weighs only 0.13 kg, which reduces load on card guides during handling.