Songle 1 channel 5V 30A Relay Module power failure relay

OverviewModule specification 1,the module used authentic quality relay,normally open interface maximum load: ac 250 v / 30 a,dc 30 v / 30 a; 2,using the industry's top quality subminiature two-way isolation optical coupling,strong anti-interference ability,stable performance;Trigger current only 3 ma. 3,modules,working voltage is 5V,12V and 24V are available; 4,the user can choose the relay control level,can be a high level off,also can be low level and off;Module contains a limited flow resistance,can directly use the power supply is negative control,you can also use the MCU I/O control; 5,fault-tolerant design,even if the control line is broken,relay will not move; 6,the power indicator light (red),1 road relay status indicator light (blue) 7,human interface design,all interface can be directly by terminal connection leads,is very convenient 8,module size: 6.0 cm * 3.0 m * 2.5 cm (length * width * height) 9,is equipped with four fixed bolt hole,convenient installation The second module interface Interface module control side: there are 4 line,all interfaces are terminal blocks,easy connection 1,DC + : external DC power anode (5V,12V and 24V module selection) 2,DC - : external negative DC power supply 3,VREF,photoelectric isolation reference ground control end, If using high level control: this signal is connected in the user control panel power of the cathode If the low level control: this signal is connected on the user control panel power supply of the anode 4,CH1: relay control interface, If VREF to connect power negative: this port high level (relative to VREF) relay and accordingly If VREF receive positive: this port low level (relative to VREF) relay and accordingly