Product Description:

The VT-SR2-1X/0-100 is an electronic control card produced by Bosch Rexroth Indramat within the VT-SWMA Modules series. Installed in a control rack or valve manifold, the card converts an external voltage reference into a controlled current for proportional valves used in industrial automation. By executing this modulation on a plug-in board, it allows machinery builders to adjust flow or pressure loops without adding discrete wiring or standalone controllers. The design focuses on repeatable current regulation and straightforward integration into existing 24-volt machine control architectures.

It is powered from a nominal 24 VDC supply, so the logic and output stages draw energy directly from standard industrial power buses. The command stage accepts a differential voltage signal of ±10 V, which represents the full operating span of the target valve. Internal scaling converts this reference into drive current. At the output, the regulator can source or sink up to ±100 mA, giving sufficient authority for most proportional solenoids without external boosters. Because the module processes an analog signal path, resolution depends on the precision of the upstream controller rather than internal digitization. Field wiring lands on a 32-contact DIN connector, and the presence of 32 pins separates low-level inputs, supply, and high-current terminals to minimize crosstalk.

All connections follow Form D coding, so the board mates with keyed headers that use the same connection pattern. The carrier itself is a printed circuit board, so traces and components remain visible without dismantling a potted enclosure. With a mass of only 0.25 kg, the card adds minimal load to slide-in frames. There is no built-in position feedback, so external transducers or closed-loop drives are required if downstream position information is needed.