Product Description:

The VT-UK2-3X/VT4746/U134 universal card is produced by Bosch Rexroth Indramat for the VT-UK2 Universal Cards series. It is intended for rack-mounted electro-hydraulic controllers, where it furnishes reference levels, scales analog feedback, and routes command signals between a machine’s PLC and proportional valve amplifiers. By matching the electrical layout used throughout the series, the board slides directly into standardized backplanes and supports signal-channel changes without rewiring entire cabinets.

This model follows the Eurocard format, so its outline is kept to a compact 100 x 160 mm. A backplane interface built on the DIN 41612 pattern mates with a 32-way Blade Connector, allowing the card to be inserted and removed with minimal force while preserving contact integrity over many cycles. The circuitry is energized from a single 10 V DC input, which serves as both the supply for internal stages and a stabilized reference for downstream converters. This arrangement helps the host controller maintain consistent loop behavior because the reference voltage remains stable when neighboring modules draw current.

The trim section carries 5 null-point potentiometers that permit individual zero adjustments on separate channels, making it possible to remove offset errors introduced by sensor tolerances. Signal processing is performed by 6 operational amplifiers, each wired for unity gain or proportional gain depending on the jumper configuration. Conditioned outputs are sourced through the backplane at a maximum of 5 mA, which protects delicate transducer windings from overcurrent while still driving typical valve electronics. The final stage reproduces command levels as a calibrated 10 V output, giving downstream devices a full-scale reference identical to the card’s supply and simplifying error budgeting across the control chain.