Product Description:

The VT1600-S-20 is a plug-in servo amplifier card produced by Bosch Rexroth Indramat for the VT 1600 Servo Amplifiers series. Installed in a 19-inch rack, the card conditions command signals and delivers controlled coil current to proportional or servo valves. Within an automated cell, it closes the analog loop between a motion controller and a hydraulic actuator, converting low-level voltage references into the regulated power needed for accurate position, pressure, or flow regulation in machine tools, presses, and material-handling equipment.

The module follows Eurocard mechanics with a card height of 100 mm and a card width of 160 mm, allowing direct insertion into standardized backplanes. A front plate height of 128 mm provides space for test pins and trim potentiometers while fitting the rack opening without obstruction. At just 0.15 kg, the lightweight board minimizes load on guide rails. The power stage is matched to valve coils having a resistance of 2,000 ohms, which limits current draw and reduces heat generation. The compact format and matched coil resistance suit densely populated enclosures where thermal budgets are restricted.

Dynamic control elements are optimized for noise reduction and valve hysteresis. A built-in dither generator supplies 3 mApp at a frequency of 340 Hz, superimposed on the DC output to help overcome friction in the valve spool. The board’s logic circuitry and op-amps run from a supply that draws less than 200 mA, keeping auxiliary power demand low. Command relays switch in 1 ms, enabling rapid enable or inhibit actions without significant wear. Three separate PID adjusters allow independent setting of proportional gain, integral time, and derivative response, so the amplifier can be tuned to a wide range of hydraulic axes without external programming tools.