EHA-PID-201-A-10 by Vickers

The EHA-PID-201-A-10 is an electronic accessory module manufactured by Vickers and listed in the Vickers Accessories series. It is intended for panel-mounted motion and pressure loops where a proportional-integral-derivative circuit conditions command, feedback, and feed-forward signals. By presenting standardized reference voltages and collecting sensor returns, the unit enables closed-loop control of proportional valves or actuators directly from a programmable logic controller, supporting stable and repeatable positioning and force regulation in automated machinery. Its low thermal loss design supports dense cabinet layouts.

It draws a nominal input of 24 V DC from the machine supply and consumes only 6 W, so heat generation remains modest during continuous service. Installation uses DIN EN 50022 or 50035 rails, allowing the module to clip into standard racks without extra hardware. The demand signal path presents 100 k? of input impedance, while the separate feed-forward node is set at 6 k?; these values minimize loading errors on external controllers and allow the two signals to be weighted independently. A switched input path rated at 10 k? is provided for digital mode selection. The primary PID drive signal is delivered as ±10 V, 5 mA, which is suitable for most proportional valve coils.

The enable circuitry activates when the control line exceeds 17 V and turns off below 3.5 V, giving a wide noise margin for field wiring. During operation, the board sources a feedback analog output of ±10 V, 1 mA so a PLC or data logger can monitor the actual PID value without extra buffering. Twin reference outputs supply -10 V and +10 V at 10 mA each for external potentiometers. Sensor channels accommodate voltage transducers through a 1 M? input impedance or 4-20 mA devices across a 100 ? load, and the overall assembly carries an IP20 protection class suitable for clean, enclosed cabinets.