VT-SR2-1X/0-60

The VT-SR2-1X/0-60 is an interface module from Bosch Rexroth Indramat that belongs to the VT-SWMA Modules series. It converts low-level command signals into controlled current for proportional valves or servovalves used in presses, test rigs, and machining centers. Installed in a standard rack, the card allows a PLC or motion controller to regulate hydraulic flow or pressure by driving a connected valve coil precisely. This arrangement provides a direct electrical interface between the automation controller and the hydraulic valve.

Routine operation is supported by a supply bus of 24 VDC, which powers the analog circuitry and output stages. The command path remains analog, so differential references from a PLC can be wired directly to the module without digital conversion latency. At its output, the card delivers a coil current of ±60 mA, allowing symmetrical actuation of two-stage servovalves while limiting power dissipation. Field connections are routed through a 32-pin connector plug, Form D, which provides connections for power, command, monitor, and test signals. The board fits into a card holder or 19-inch rack, where spring latches secure the front panel and align the edge connector. Its rack-mounted format allows multiple valve-control cards to operate from a common supply bus while maintaining separate command and output channels.

The current range and pinout are compatible with proportional valves or servovalves such as 4WS2EM6/10/16, 4WS2EB10, 4DS1EO2, and 3DS2EH10, so external adapters are not required at the hydraulic manifold. Because the valve spool operates without electrical position feedback, the drive circuit relies on coil current for force balancing. This control method is suitable for systems that use mechanical null adjustment or pilot-pressure stabilization. The assembled board weighs 0.25 kg, which minimizes the load on large multi-slot backplanes. Its low mass also reduces strain on the rack guides and connector when the card is installed vertically in a centralized automation cabinet.