SA401 220V AC 4 Wire
SA401 is a motorized valve actuator with a 220V AC supply and four wire connections. It opens or closes the valve through a dry contact such as a switch, float switch or relay contact.
Before You Begin
Prepare a 220V AC power line with standard safety protections, including MCBs and proper earthing.
Caution: A qualified electrician must perform the 220V AC installation. Disconnect power before making or changing connections.
Wiring Diagram
Wire Connections
- Red — Phase (live): Connect to 220V AC phase.
- Black — Neutral: Connect to 220V AC neutral.
- Green and blue — Signal terminals: Connect across a dry contact switch, relay or float switch.
Important: Do not apply voltage to the green or blue wires. Connect these signal wires only through a dry contact.
How the Valve Operates
- Connect the red and black supply wires to keep the actuator powered and ready.
- Connect the green and blue wires to opposite terminals of the dry contact.
- When the contact closes, the actuator opens the valve.
- When the contact opens, the actuator closes the valve.
The valve holds its last position if power fails. This is a stay-put design.
Power and Energy Usage
Keep power connected through the red and black wires during normal operation. The motor runs during valve movement.
Built-in limit switches stop the motor when the valve is fully open or fully closed. No external controller or sensor is needed to stop the motor at those end positions.
Frequently Asked Questions
How does the valve stop when fully open or closed?
Internal limit switches stop the motor at the fully open and fully closed positions. Additional external sensors or stopping logic are not required for this function.
Should I disconnect power after the valve opens or closes?
No. Leave the 220V AC supply connected during normal operation. The motor runs only during movement and stops at the travel limit.
Does this model provide valve-position feedback?
This wiring model does not provide feedback signals. Other models are available with feedback outputs if the system needs confirmation of open or closed status.
Can I use a float switch for water-level control?
Yes. Connect the green and blue wires across the float switch's dry contact terminals. The valve opens when the float contact closes and closes when it opens. The water levels at which these actions occur depend on the float switch configuration.