Product Description:

The VT-SR7-1X/0/A4VS.355HS is a control card from Bosch Rexroth Indramat in the VT-SWMA Modules series. Installed in a rack assembly, the board supplies regulated current to proportional valves and exchanges position data for closed-loop industrial automation. Its slim footprint, plug-in connector, and rack-compatible format help it fit crowded control cabinets without major wiring changes. The card is suited to hydraulic control tasks where stable valve actuation and compact electronics are required.

It operates from an input of ±24 VDC, energizing signal channels and driving the onboard relay after the +24 V call-up level is reached. Valve excitation is limited to ±60 mA, which helps protect the coil while still providing enough force for medium-size hydraulic spools. The card uses a push-pull bipolar output stage, so current reverses cleanly without external H-bridge hardware. A superimposed 340 Hz dither reduces hysteresis and improves positioning repeatability during small command changes. Field wiring connects through a 32-Pin DIN 41612 Form D header, and the module occupies only 1 TE (5.08 mm) of rack width for dense multi-axis layouts.

As a standard Euro-Card, the module follows common rack dimensions and uses an auxiliary rail of ±15 VDC for internal signal conditioning. It accepts inductive position feedback, which allows the control loop to process sensor signals without a separate converter stage. The command relay uses a coil resistance of 700 Ω, drawing about 34 mA at the stated +26 V nominal. Because no voltage regulator is fitted, the host rack must provide low-ripple supplies to maintain current accuracy and stable dither behavior. This arrangement is appropriate for hydraulic presses and plastics equipment that use several coordinated valve-control channels in one cabinet.