DC12V 16 Channel Low Level with Light Coupling Power Supply Relay Module

Specifications

1. Power Supply:

• Operating Voltage: DC 12V
• Quiescent Current: 20mA
• Operating Current: ~300mA

2. Relay Specifications:

• Relay Type: 16-channel
• Trigger: Low-Level Trigger
  • A low signal (0V) activates the relay.
• Contact Capacity: 10A 250VAC or 10A 30VDC
• Relay Model: SRD-12VDC-SL-C
• Relay Life: 100,000 operations (mechanical)

3. Control Signal:

• Input Signal: Low-level trigger (active low)
• Signal Voltage: 0V (active) and 3-5V (inactive)
• Compatible Control Signals: 5V, 3.3V TTL logic (Arduino, Raspberry Pi, ESP8266, etc.)

4. Protection and Isolation:

• Optocoupler Isolation: Ensures electrical isolation between the high-power relay circuit and the low-power control circuit, protecting sensitive control devices.
• Flyback Diodes: Protection against voltage spikes during switching operations.

5. Pin Definitions:

• IN1 – IN16: Control inputs for each relay (Low level triggers the relay).
• VCC: 12V power input.
• GND: Ground.
• JD-VCC: Jumper between VCC and JD-VCC to provide the same power to the relays and control logic.

6. Board Layout:

• LED Indicators: Each relay channel has a corresponding LED that lights up when the relay is activated, offering visual feedback.
• Dimensions:
  • Board Size: Approx. 180mm x 90mm (varies slightly by manufacturer)
  • Mounting Holes: Standard hole arrangement for easy mounting

7. Temperature and Environment:

• Operating Temperature: -25°C to +85°C
• Humidity: 5% to 85% (non-condensing)

8. Application Examples:

• Home automation
• Industrial automation
• Control systems (AC/DC loads, lights, fans, motors)
• Microcontroller-based projects (Arduino, Raspberry Pi)

9. Additional Features:

• Screw Terminals: Provides easy connections for power and load.
• Jumper Settings: Option to separate the control power from the relay power by removing the JD-VCC jumper (useful in certain setups).