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Digital Modulating Controller

DMC Schematics and Technical Info.pdf
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The DMC

The DMC - Digital Valve Positioner is used in our flow control valves to proportionally position valve actuator between full open and closed positions via a 4-20mA or 0-10Vdc input signal. The card has been designed to be extremely easy to setup utilizing an on board microprocessor to store the zero and span positions with a simple button touch. It isn't necessary to cycle back and forth to set the zero and span. Local control switches on board allow for precise setting of the valve/actuator. Once you have the positions desired, simply store them in memory.

Optional Features

Zero and Span Digital setup (no trim pots to adjust)
4-20Ma or 0-10Vdc input - Jumper selectable
Extremely compact design - 2.75" sq. x 1.4" wide
Push button Local Control (Local/Remote Mode, Jog Hi, Jog Lo, Enter, Reset)
Loss of Signal Command - Close, Stay Put, Open - Jumper selectable
Reverse or Direct Acting - Jumper selectable
Microchip 8 bit microprocessor with flash memory (retains software nearly indefinitely)
10 bit Analog to Digital converter chip
Concurrent processor algorithm with interrupt routine
On board transformer (AC version)
10 amp relay contacts for motor input
UL508/CSA high voltage trace design
115 Vac or 12/24 Vdc power versions available (consult EVSCO for other power requirements)
RS232 serial port header
The DC version also has Speed control via pulse width modulation

Standard Valves and Components In Stock

phone: 847.362.7068
toll free: 800.362.7068
fax: 847.362.7501

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