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Product introduction: 1, this module meet safety standard, control areas and load area have the isolation groove; 2, optical coupling isolation module, triggering more reliable, more stable; 3, the double FR - 4 circuit board design, high-end SMT process; 4, the pine le - relay control; 5, have power and relay operation instructions, and bright, disconnect the dawn; 6, signal input with a high level signal, the common and often start conduction; 7, relay can directly control all kinds of equipment and load; 8, one often opened a normally closed contact; 9, blue KF301 terminal line more convenient. 10, module size: 53 x18x18. 5 mm;Net weight: 16 g Module interface: The positive (according to the relay voltage VCC: connect power supply) GND: connect power negative IN: relay module (effective) high level trigger signal trigger end High level and low level meaning: High level trigger refers to using the anode voltage at the VCC connection way of a trigger and trigger the end, when the trigger side has the positive voltage or to trigger voltage when the relay is off. Low level trigger refers to using the negative voltage at the GND connection way of a trigger and trigger the end, when the trigger side has 0 v low voltage or voltage to can trigger, the relay is off. Electrical parameters: Voltage version The static current working current trigger voltage trigger current 5V 4mA 65 mA     2-5V 2mA 9V  5MA 45MA      4-9V 3 mA 12V 5.5mA 42mA  4-9 v 3 mA 24V 12MA  35MA  8-24V 3MA Relay contact capacity: 10A 250V (AC) or 30V 30A maximum load capacity (theory) (DC) Connect ac power proposal under 1500W, dc under 200W