Product Description:

The VT 1610-3X/E1/4WS2EE10 is a plug-in servo amplifier card produced by Bosch Rexroth Indramat for proportional valve control within the VT 1600 Servo Amplifiers series. Installed in a modular rack, the card converts low-level command voltages into bidirectional coil currents. This allows hydraulic actuators to follow an electronic reference in closed-loop industrial automation. The plug-in format suits rack-based hydraulic control systems that require compact signal conditioning and valve actuation.

At the input stage, the actuator coil has a resistance of 2000 Ω, setting the current limit for the proportional valve. Logic functions require <200 mA from the auxiliary rail, helping conserve cabinet power. A quartz-based oscillator at 5 kHz gates the power transistors, and a dither signal is applied to reduce static friction in the hydraulic spool. After filtering, the card can source or sink ±60 mA to the valve winding. Field wiring lands on a DIN 41612 Form D 32-pole connector, simplifying removal from the rack.

The card shares the same power rails used by the pilot relays, accepting a smoothed supply of ±22 to 28 V and feeding an onboard regulator that produces a stabilized ±15 V reference for the analog circuitry. Command signals between the controller and the amplifier are differential and span 0 to ±10 V, matching standard motion controllers. A pulse modulator with a duty period of 1 ms helps the requested coil current reach its target within one control interval. Continuous operation is specified from 0 to +50 °C, and the 0.20 kg card therefore needs only natural convection in most cabinets. Mechanical planning is simplified by fixed space requirements of one division for the conductor side and seven divisions for components, where one division equals 5.08 mm, allowing the rack to be laid out precisely. Relay outputs use the same supply range as the main power rails, and the built-in dither generator can be disabled when it is not required.