EHA-PID-201-A-20 Vickers
Wake Industrial LLC is not an authorized distributor of this product.
MPN: 02-104842
The Vickers EHA-PID-201-A-20 is a power supply from the EHA Power Supplies series, operating with a nominal supply voltage of 24 VDC and a power consumption of 6 W. It features differential demand and sensor voltage inputs of ±10 V, with input impedances of 100 kΩ and 1 MΩ respectively. The device has PID output voltage of ±10 V at 5 mA and is rated for IP20 protection according to IEC 529.
Internal Product Review
The EHA-PID-201-A-20 from Vickers is a precision power supply designed for control systems, offering a nominal supply voltage of 24 VDC and IP20 protection for safe cabinet installation. Input versatility is provided by ±10 V differential demand and feed-forward capabilities, each with specialized input impedance for accurate signal handling. Overall, this unit delivers consistent performance with a PID output drive of 5 mA and is well-suited for advanced automation requirements.
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Product Description:
The EHA-PID-201-A-20 is a compact electronic module from Vickers and belongs to the EHA Power Supplies series. It combines a regulated supply rail with signal-conditioning and proportional-integral-derivative circuitry so that hydraulic valve amplifiers, positioners, or similar closed-loop devices receive stable reference voltages and conditioned feedback. Within an automation panel it serves as the interface between low-level command signals and the higher-power electro-hydraulic actuators that actually move the machine.
The unit is powered from a 24 VDC source and draws no more than 6 W, allowing dense cabinet layouts without excessive heat. Its enclosure meets IP20, protecting live parts when mounted inside a control cabinet. Command hardware can present a differential demand input of ±10 V; the module accepts this through a high-impedance 100 kΩ pair to avoid loading delicate analog outputs. A separate feed-forward node also accepts ±10 V and is terminated at 6 kΩ, enabling velocity or disturbance compensation. Internally, the circuit provides a +10 V positive reference and a −10 V negative reference, each rated at 10 mA, so external potentiometers can be powered without a dedicated supply. Sensor feedback may arrive as ±10 V or as a 50 mA current loop; the voltage channel is buffered by a 1 MΩ network while current feedback sees only 100 Ω burden for accurate shunt conversion.
The PID section can deliver a drive current of 5 mA into the final stage, and its output span is factory-scaled for ±10 V swing referenced to system common. For set-point generation, the positive reference rail provides +10 V (10 mA) with minimal temperature drift, while the buffered feedback path maintains signal integrity through a 1 MΩ impedance. Output filtering holds residual amplitude within ±10% pk of nominal to prevent control-loop oscillation when the supply bus is noisy. Together these characteristics let the module condition, compare, and correct motion or pressure signals without introducing significant electrical loading or ripple into the control architecture.
