VT-NSPA1-50-10

The Bosch Rexroth Indramat VT-NSPA1-50-10 proportional amplifier is part of the VT-SSPA Plugin Proportional Amplifiers series, delivering precise control in compact, robust form. Designed for industrial automation, this unit operates at 24 VDC and provides both proportional and switching command interfaces. Its core capability includes a proportional input range of 0–10 V alongside a switching input range of 12 V to UB, enabling seamless integration with analog and digital control systems. The amplifier features an adjustable ramp time of 100 ms to 5 s to fine-tune dynamic response for a variety of actuator types and load profiles. With an IP65 protection rating to EN60529, the VT-NSPA1-50-10 withstands dust ingress and low-pressure water jets, ensuring reliable operation in harsh environments.

Detailed technical specifications define the VT-NSPA1-50-10’s performance envelope. It accepts a nominal operating voltage of 24 VDC within a broader min command voltage of 18 V to max command voltage of 35 V, preventing under-voltage lockout or dielectric breakdown. The amplifier’s input resistance of 20 kΩ minimizes loading on PLC or DCS outputs, while a max cable inductance of 100 µH limits transient voltages at the power stage. Signal and power connections include 4 screw terminals (cable gland) with a cable diameter range of 4.5–11 mm plus a 4-pin M12×1 connector, simplifying installation and service. Internal control is driven by a clock frequency at Imax of 305 Hz, balancing switching losses with passive component size.

Operational features and performance metrics ensure the amplifier meets stringent industrial requirements. The power stage handles a nominal current of 2.5 A and supports a max current of 2.6 A, enabling precise current control for proportional valves and servo actuators. Thermal management and electromagnetic compatibility are optimized through the specified switching frequency, reducing EMI and improving efficiency. The unit operates reliably across a broad operating temperature range of –25 °C to +60 °C, maintaining consistent output under varying ambient conditions. Its robust design and adjustable ramp profile yield repeatable dynamic responses, critical for high-speed hydraulic and pneumatic control.

System integration is streamlined by the VT-SSPA Plugin architecture, which plugs directly into compatible Bosch Rexroth manifolds and control modules. The combination of 4 screw terminal cable glands and an M12×1 connection provides flexibility for wiring in tight control cabinets or field installations. By leveraging standard 0–10 V proportional and 12 V to UB switching interfaces, the amplifier interfaces easily with PLCs, DCS, and motion controllers. Ideal target applications include industrial machinery, mobile hydraulics, packaging equipment, and process automation where precise, dynamic proportional control and high ingress protection are mandatory.