YOKOGAWA DOX8HS, User Manual, Page: 25 / 32

< 3. Installation, Piping and Wiring >
3-7
IM 19H1D2-01E
3.3.3 Wiring
Normally, washing is executed when a "cleaning" contact signal is received from the converter.
Note: The contact output must be set to "cleaning" function. For details, refer to the user’s
manual supplied with each converter.
Install wiring so that when the contact signal is output drive power is supplied to the solenoid
valve (or pump), and utility (air or water flows into the washing device).
The cleaning contact of the converter has the following specifications.
Cleaning contact specifications
Contact type:
Relay contact (dry contact)
Contact capacity: Refer to user’s manual supplied with the converter.
Solenoid Valve
Solenoid valve driving
power supply
Washing contact
Signal Terminals
Figure 3.7 Solenoid Driving Circuit Wiring
Output timing of "cleaning" contact signal
• The converter is first turned on, then cleaning is executed after the preset cleaning interval
elapses. If the automatic cleaning function is set to "stop", when "execute" is set cleaning is
executed after the cleaning interval lapses.
Execution of manual cleaning and "automatic cleaning start" command
• The converter can be manually operated any time through key operation.
• The automatic cleaning start command can be sent any time by inputting the contact signal
to the converter.