Press Pelease
NEWS RELEASE REX-D900Z
2002/11/21

RKC INSTRUMENT ANNOUNCES
REX-D900Z DIGITAL CONTROLLER DRIVES MOTOR CONTROLLER
RKC Instrument's REX-D900Z is a full function PID valve controller with valve positioning. The REX-D900Z with universal input is an addition to the "D" Series temperature control series offering fuzzy logic. It is designed specifically to operate valves without feedback resistance input. The REX-D900Z uses a time function to determine the proper position to maintain the desired Set Value (SV). The user determines the length of time that the valve requires to process from fully closed to fully opened. The valve operation time is entered into the motor time parameter. The REX-D900Z then utilizes this time span to determine the position of the valve. This unique control feature is of great interest to processors with gas-fired furnace applications.

The REX-D900Z operates in either automatic or manual mode. In the automatic mode, this controller provides normal PID control using a sensor as the input. In the manual mode, the user can manually adjust the opening or closing of the valve. The REX-D900Z with motor valve positioning offers superior control over valves without the need for feedback resistors to determine valve position.

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