SA401 220V AC 4 Wire

The SA401 is a motorized valve actuator designed to operate on 220V AC supply with four wire connections. It’s ideal for systems where you want the valve to open or close based on a simple switch, float, or relay contact.

⚠️ Before You Begin

Power Supply Requirement:
Prepare a 220V AC power line with standard safety protections like MCBs and proper earthing.

⚡ Caution: 220V AC installation should be performed by a qualified electrician only.

🧰 Wire Connections (Color Code)

The SA401 actuator includes the following four wires:

• Red – Phase (Live): Connect to 220V AC Phase
• Black – Neutral: Connect to 220V AC Neutral
• Green & Blue – Signal Terminals (for dry contact control)

🚫 Do not apply any voltage to the Green or Blue wires.
✅ These two wires must be connected only through a dry contact such as a switch, relay, or float switch.

⚙️ How the Valve Operates

• Once powered with 220V AC (Red and Black), the actuator stays ready.
• Connect Green and Blue wires to opposite ends of a dry contact switch.
• When the switch closes (contact made), the actuator opens the valve.
• When the switch opens (the contact breaks), the actuator closes the valve.
• The valve holds its last position even if the power goes out — this is known as a “stay-put” design.

🟢 This system is ideal for simple open/close operations controlled by switches, floats, or relay outputs.

🔋 Power & Energy Usage

• Power is always connected via Red and Black.
• Motor runs only during valve movement, consuming minimal power.
• Built-in internal limit switches automatically stop the motor once the valve is fully opened or fully closed — no external controller or sensor needed.

❓ Frequently Asked Questions

Q: How does the valve stop once it’s fully open or closed?
A: The actuator has built-in internal limit switches. These automatically stop the motor when the valve reaches the full open or full close position.
✅ You do not need to add any external sensors or logic to stop it.

Q: Do I need to disconnect power after the valve opens or closes?
A: No. You can leave the 220V AC power connected. The motor draws power only during movement. Once fully open or closed, it stops consuming power thanks to the internal limit switches.

Q: Can I get feedback from this actuator (like valve open or closed signal)?
A: This wiring model does not provide feedback signals.
However, other models are available with built-in feedback outputs if your system requires confirmation of open/close status.

Q: Can I use this with a float switch to control water level?
A: Yes! Just connect the Green and Blue wires across the float switch terminals.
When the float switch closes (e.g., water drops below a level), the valve will open.
When the float opens (e.g., water reaches the level), the valve will close.