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8 road relay output module, relay contact output 250V and maximum 7Amp. Input IN1 and IN2, IN3, IN4, IN5, IN6, IN7, IN8 signal low level effectively. VCC, GND power input end, can relay JD - VCC power relay power input end alone.Some of its uses are1. Support all single-chip microcomputer control2. industrial circle2. PLC control2. Household intelligent controlIt is equipped with four fixed bolt hole, hole is 3.1 mm, distance 131 mm * 49.5 mm. 1. This module is in line with international safety standard, control areas and load area have the isolation groove2. The double FR - 4 circuit board design, high-end SMT process3. USES the loose music authentic relay control4. Have relay operation instructions, and bright, disconnect the dawn5. Signal input with low level signal, the common and often start conduction6. relay can directly control all kinds of equipment and load7. blue KF301 terminal line more convenient