Product Description:

The VT16000-21-W-2 servo amplifier belongs to the VT 1600 Servo Amplifiers series produced by Bosch Rexroth Indramat. It is a plug-in analog card that conditions spool-type proportional valve signals so discrete or closed-loop controllers can drive hydraulic actuators with stable force and velocity profiles in industrial automation cells. The module installs on standardized Eurocard guide rails inside machine control cabinets, where it links the motion controller to proportional pressure or directional valves. This arrangement supports compact cabinet integration without requiring a separate stand-alone amplifier housing.

Its physical footprint follows the standard Eurocard outline of 100 x 160 mm, allowing direct insertion into rack assemblies without custom hardware. On the component side, the layout spans 7 divisions, providing enough board space for the proportional driver circuitry while maintaining separation for low-noise operation. The amplifier injects a dithering signal of 3 mAPP at 340 Hz; this superimposed current helps reduce stiction in the valve sleeve and improves repeatable positioning. During operation, the electronics draw less than 200 mA from the ±15 V backplane, which keeps the load on the cabinet power bus relatively low.

The front interface is protected by an aluminum plate that measures 128 mm in height and aligns with DIN 41494 sub-rack cutouts for straightforward removal from the rack. The onboard change-over relay coil has a resistance of 2000 Ω, allowing consistent pickup voltage behavior, while a switching window of 1 ms supports fast command transfer between pilot stages. Across the rack, the card occupies 8 HP, and the solder-side clearance of 5.08 mm leaves room between adjacent modules while helping maintain orderly cable routing. These dimensions suit standard control cabinet layouts used with Eurocard-based hydraulic control electronics.