How to Use F-1049 DC to DC SSR: Examples, Pinouts, and Specs

The F-1049 DC to DC Solid State Relay (SSR), manufactured by CZH-LABS (Part ID: OONO F-1049), is an electronic switching device designed to control high-voltage DC loads using a low-voltage DC control signal. Unlike traditional mechanical relays, the F-1049 SSR provides electrical isolation between the control and load circuits, ensuring safe operation and eliminating mechanical wear. This makes it ideal for applications requiring high reliability and fast switching.

• Industrial automation systems
• Motor control and DC load switching
• Battery management systems
• Renewable energy systems (e.g., solar inverters)
• Robotics and IoT devices
• High-speed switching applications

The F-1049 SSR has four terminals, as described in the table below:

1. Connect the Control Circuit:

   • Attach the positive control signal to the Control (+) terminal (Pin 1).
   • Connect the ground of the control signal to the Control (-) terminal (Pin 2).
   • Ensure the control voltage is within the range of 3.0V to 32.0V DC.

2. Connect the Load Circuit:

   • Connect the positive side of the load to the Load (+) terminal (Pin 3).
   • Connect the negative side of the load to the Load (-) terminal (Pin 4).
   • Ensure the load voltage and current do not exceed 200V DC and 10A, respectively.

3. Power On:

   • Apply the control voltage to activate the relay. The load circuit will be energized when the control signal is applied.

4. Switching:

   • The relay will switch on or off based on the presence or absence of the control signal. The switching speed is ≤ 10ms.

• Heat Dissipation: Ensure proper ventilation or use a heatsink if the relay operates near its maximum current rating.
• Isolation: Verify that the control and load circuits are electrically isolated to prevent damage.
• Polarity: Observe correct polarity for both control and load connections to avoid malfunction.
• Overvoltage Protection: Use appropriate protection (e.g., TVS diodes) to safeguard the relay from voltage spikes.
• Testing: Test the relay with a low-power load before connecting it to high-power equipment.

The F-1049 SSR can be controlled using an Arduino UNO. Below is an example circuit and code to toggle a DC load using the relay.

1. Connect the Arduino's digital pin (e.g., Pin 9) to the Control (+) terminal of the SSR.
2. Connect the Arduino's GND to the Control (-) terminal of the SSR.
3. Connect the DC load to the Load (+) and Load (-) terminals of the SSR.

// Example code to control the F-1049 SSR with an Arduino UNO
// This code toggles the relay on and off every 2 seconds.

#define RELAY_PIN 9  // Define the Arduino pin connected to the SSR Control (+)

void setup() {
  pinMode(RELAY_PIN, OUTPUT);  // Set the relay pin as an output
}

void loop() {
  digitalWrite(RELAY_PIN, HIGH);  // Turn the relay ON
  delay(2000);                    // Wait for 2 seconds
  digitalWrite(RELAY_PIN, LOW);   // Turn the relay OFF
  delay(2000);                    // Wait for 2 seconds
}

1. Can the F-1049 SSR handle AC loads?

   • No, the F-1049 is designed specifically for DC loads. For AC loads, use an AC-rated SSR.

2. What happens if the load exceeds 10A?

   • Exceeding the maximum current rating can damage the relay. Use a relay with a higher current rating or reduce the load.

3. Is the relay suitable for PWM control?

   • The F-1049 SSR is not optimized for high-frequency PWM control due to its switching speed (≤ 10ms). Use a MOSFET or similar device for high-speed switching.

4. Can I use the relay in outdoor environments?

   • The relay is not weatherproof. Use an appropriate enclosure to protect it from moisture and dust.

By following this documentation, users can safely and effectively integrate the F-1049 DC to DC SSR into their projects.