INSTALLATION
HPR400XD Manual Gas Instruction Manual 3-33
Examples of input circuits
Output from
CNC/PLC
External relay
(AC or DC)
1. Relay interface
+24 VDC (See note 4 on page 3-31)
HPR
Power
ground
2. Optocoupler interface
CNC/PLC
+24 VDC
HPR
Power
ground
Transistor-output
optocoupler
12V-24VDC
CNC/PLC
+24 VDC
HPR
Power
ground Power
ground
Active-high drive
3. Amplified-output interface
Note: The external relay's life may be improved by adding a
metallized-polyester capacitor (0.022µF 100V or higher) in
parallel with the relay contacts.
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