SA301 12V DC 3 Wire

The SA301 is a 12V DC 3-wire motorized valve actuator, widely used in automation systems due to its simple operation and low power consumption. Follow this guide for safe and effective installation.

⚠️ Before You Begin

Power Supply Requirement:
Prepare a 12V DC power supply, preferably rated at 1.5 Amps or higher.

🔧 Always refer to the actuator’s label or datasheet to confirm the current rating, as it may vary between models.

🧰 Wire Connections

The SA301 actuator has three colored wires:

• Red Wire (Power +12V DC): Connect to the positive terminal of the power supply.
• Black Wire (Power Ground): Connect to the negative terminal (0V/GND) of the power supply.
• Green Wire (Open Command Signal): Connect to +12V DC only when the valve needs to be opened.

✅ Red and Black wires must be always connected to 12V DC power for proper functioning.

⚙️ How It Works

• The valve opens when the Green wire is connected to +12V.
• Disconnect the Green wire to stop the opening motion. The valve will stay in its last position.
• Use a PLC, relay, float switch, or manual switch to control the Green wire.

⚡ The valve is a “stay-put” type – it holds its current position even if power fails.

🔋 Power Consumption

• When Idle (Valve Closed): ~0 mA
• When Idle (Valve Open): ~20 mA
• During Movement (Open/Close): Up to 1.5 Amps (or as per actuator specs)

🔌 Power is consumed only during valve movement. Once the movement stops, current draw is minimal or zero.

🧪 Quick Test

To verify your wiring:

1. Connect Red to +12V, Black to GND.
2. Tap Green wire to +12V – the valve should start opening.
3. Remove the Green wire – the valve remains open.
4. Disconnect power to reset or stop usage.

📝 Notes & Tips

• ✅ Keep Red and Black connected at all times.
• ⚠️ Only apply 12V to the Green wire when valve operation is needed.
• ❌ Do not reverse polarity – it can damage the actuator.