relay module 5v low level trigger relay expansion board

1.this module in line with international safety standard, control area and load area isolation tank;
2. the pine music quality goods relay;
3. with power and relay action instructions, suction close bright, disconnect not bright,
4. signal input end have signal, public end and often start will be conducting;
5. and can be used as a single chip microcomputer development board module, can be used as home appliances control;
6. control dc or ac signal, can control 220 v ac load;
7. have a often score a normally closed contacts;
8. blue KF301 terminal joint line more convenient

1. Module power supply: the power must be DC, the voltage should be consistent with the relay voltage

2. Relay common, normally open, normally closed, but single-pole double-throw switch, wiring as follows