8. Interfaces and Communication MD500 User Manual
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8 Interfaces and Communication
8.1 About the Use of MD500 Terminals
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Use of DI Terminals
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board, DI-6 to DI-10,which are available to use if you have this option installed.
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ƕ Logic 0 (terminal is inactive) is when the DI terminal 24 V line is not shorted to COM.
ƕ Logic 1 (terminal is active) is when the DI terminal 24 V line is shorted to COM.
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code.
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more information about this.
Note
The hardware design allows only DI5 to receive high-speed pulse signals. If your application
uses high-speed pulse counts, then you must use DI5 for this input.
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Filter Time and Delay Functions
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electrical interference.
The MD500 also provides a signal delay function on digital inputs DI1 to DI3 to support some applications that require a delayed
digital input. You can set the delay separately for each of the three DI terminals:
ƕ Function code F4-35 controls the delay on DI1.
ƕ Function code F4-36 controls the delay on DI2.
ƕ Function code F4-37 controls the delay on DI3.
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Use of DO Terminals
There are three digital output terminals on the control board:
ƕ FM is a transistor output capable of driving a 24 V DC low-voltage circuit.
ƕ DO-1 is a transistor output capable of driving a 24 V DC low-voltage circuit.
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installed.
ƕ DO-2 s a transistor output capable of driving a 24 V DC low-voltage circuit.
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There are 40 functions available to use for these function codes.
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