Product Description:

The VT-UK2-3X/VT12290A/U155 is a plug-in universal card produced by Bosch Rexroth Indramat for the VT-UK2 Universal Cards series. Mounted inside standardized control racks, it provides a compact platform for analog signal conditioning and adjustment tasks in hydraulic or motion-control installations. By combining multiple operational amplifier channels, fine-tuning potentiometers, and backplane connectivity on one printed circuit, the card can implement filtering, scaling, or feedback loops without requiring a custom board for every machine. It can be used where command, feedback, and reference signals need to be trimmed or redistributed before they reach valves, amplifiers, or other control electronics.

The module follows the Eurocard outline specified in DIN 41494, giving it a rigid 100 x 160 mm profile that aligns with 3U sub-racks and card guides. Electrical interface to the rack is handled through a DIN 41612 backplane header, while mating contacts are presented as a blade connector. This arrangement keeps insertion consistent in standard racks and lets the card connect to shared power and signal lines through the backplane. The fixed board size also helps neighboring modules maintain proper spacing for airflow and organized routing inside the enclosure.

The signal chain itself incorporates 3 dual operational amplifiers, enabling six independent gain or buffer stages that can be configured through jumpers or external wiring for summing, differential, or inverting functions. Each amplifier channel references a stable 10 V supply rail, so transducer or valve-driver circuits can be offset or scaled without external regulators. For fine alignment, the board provides 5 null-point potentiometers, which allow zero adjustment and matching of sensor-related signals without altering the rest of the rack wiring. This makes the card useful in control sections that need repeatable analog trimming without added interface modules.