VT 16000-2X-150-A by Bosch Rexroth Indramat

The VT 16000-2X-150-A is a plug-in servo amplifier card produced by Bosch Rexroth Indramat for the VT 1600 Servo Amplifiers series. Installed in modular valve driver racks, it converts command voltages from a motion controller into proportional coil current that positions a hydraulic spool or poppet. The amplifier serves as an interface between electronic control loops and electrohydraulic actuators in industrial automation where accurate force or flow regulation is required.

The board occupies the EU-standard 3U height and plugs into a backplane through a DIN 41612 male connector that follows Form C with 32 poles, so wiring to the field remains on the rack side. Output current is limited to ±60 mA, allowing direct control of standard proportional valve coils while protecting them from overexcitation. Internal electronics superimpose a dither signal at 340 Hz with an amplitude of 3 mApp; this reduces stiction in the valve mechanism and improves repeatability. A relay on the card provides enable or shutdown control, and its switching time of 1 ms keeps hydraulic transitions fast relative to normal process dynamics. The closed-loop circuitry sits on a multilayer printed circuit board that is 1 TE wide on the solder side and 7 TE wide on the component side, matching the card-guide spacing in Eurocard frames.

The amplifier weighs 0.15 kg, which minimizes the load on telescopic guides during service. Its overall depth is 186 mm, so the unit clears typical 300 mm cabinet rails even when rear cabling is present. The card measures 172 mm in height, occupies a rack width of 8 HP, and has a 40.3 mm front panel that provides space for identification markings and test points. A coil resistance of 2000 ? supports drive tuning by indicating the steady-state current produced at a given control voltage without additional shunt resistors.