Product Description:

The VT-UK2-3X/ES-E61-A057/U531 is an electronic universal card manufactured by Bosch Rexroth Indramat for the VT-UK2 Universal Cards series. Installed in modular hydraulic controls, it conditions analog command and feedback signals for proportional or servo valve operation. By combining gain adjustment, null balancing, and reference generation on a single plug-in module, the card reduces external wiring and keeps the control layout compact. Typical applications include pressure regulation loops, speed governors, and position controllers that use standardized carrier cards to minimize downtime in hydraulic systems.

The card uses the Eurocard format and has outside dimensions of 100 x 160 mm. It occupies one standard slot in a 19-inch rack, so it fits common carrier systems without changes to the backplane layout. Rack connection is made through a DIN 41612 blade connector, and the rear interface can use form C or D depending on the available panel space. These connectors are available in 32-pin or 64-pin versions, which helps separate supply, command, and monitoring lines while retaining dedicated grounds for each amplifier channel. Guide rails on the card edges maintain alignment during insertion, and coding strips on the front edge help identify channel functions.

The conditioning network accepts a reference input of 10 V and uses 6 operational amplifiers for summing, inversion, and gain scaling. Fine offset adjustment is provided by 5 null-point potentiometers, which allow quick centering of hydraulic valves. The board can draw power from control buses that supply 15 VDC or +24 VDC, making it compatible with both legacy ±15 V frames and modern single-supply architectures. After adjustment, the output stage delivers a regulated signal to the backplane, and protective resistors limit short-circuit current at the output.