12V 2 Channel Relay Module With Optocoupler ( Blue) Low Level Triger

12V 2 Channel Relay Module Low Level Trigger With Optocoupler Relay Output 2 Way Relay Module For Arduino

SKU: SLY3011-1 Category:

Product Description


  • Increase the mains anti-reverse function, the wrong power supply will not damage the unit
  • Fault-tolerant design, control line breakage, the relay will not move
  • The module adopts original high-quality relay, normally open interface load: AC 250V/10A, DC 30V/10A
  • Using high-quality two-way small isolated optocoupler, strong anti-interference ability, stable performance; Trigger current only needs 5mA
  • Module working voltage is available for 5V, 12V, 24V; 4, 8, 12, 16 units are available
  • The user can select the relay control level, which can be high level pull or low level
  • The module has a built-in limited current resistance, which can directly use the positive and negative control of the power supply, or use the I of the single-chip microcomputer. /O port control
  • Power indicator (red), four-way relay status indicator (blue)
  • User-friendly interface design, all interfaces can be directly connected through the terminal block, which is very convenient.
  • Unit size: 7.8cm * 5.0m * 2.0cm (length * width * height)
  • With 4 3mm fixing bolt holes for easy installation

Module interface:

  • Unit control terminal: 7-wire interface, all interfaces have user wires.
  • DC: Positive external DC power supply (5V, 12V and 24V modules available).
  • DC-: Passive external DC power supply.
  • XM: Photoelectric insulation chip joint terminal.

X1-X4: relay control interface:

  • If XM is connected to the negative pole of the power supply: This port is HIGH (for XM) when the corresponding relay is turned on
  • If XM is connected to the positive pole of the power supply: This port is LOW (relative to XM) when the matching relay is connected


  • The isolated relay module is designed for harsh electromagnetic environment or high signal requirements.
  • If you want to achieve complete isolation, the user power, (ie, the reference power supply connected to the XM) and the power source to the relay module. (DC/DC-) must be marked.
  • Relay output: 12 wire interface, all interfaces have easy wire.
  • NO1–NO4: The relay normally opens the interface, and the relay is suspended before the suction, and it is short-circuited with COM after the suction.
  • COM1–COM4: Common Interface Relay.
  • NC1–NC4: normally closed interface relay, short circuit with COM before pulling relay, float after suction.


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