Over the years we have designed a range of interface units for hydraulic valve applications. Several versions have ramping, bias and maximum current adjustments with simpler analogue units for Danfoss hydraulic valves. The PWM version comes in two models 1 A and 5 A with selectable frequency. The High Current output version has dual processors with bipolar output current up to +/- 1.3 A and has several options such as dither, ramping, RS485 and output disconnect. The DCCU version provides linear control up to 2 A with polarity reversal and output disconnect relays.