1road relay module expansion board,High...

Product description:
1 , the module complies with international safety standards, the control area and the load region isolation trench ;
2 , using double-sided FR-4 circuit board design , high-end chip production process ;
3, using loose music authentic relay control ;
4, with power supply and relay instructions , pull off, disconnect does not shine ;
5 , a high level signal input signal, the common terminal will start with regular conduction ;
6 , the relay can control the various devices and the load ;
7 , there is a normally open and one normally closed contact ;
8 , blue KF301 terminals to the control line is more convenient.
9 , module size : 43x17x18.5mm; Weight : 15g

Module interface :
Input section :
VCC: positive power supply ( by relay voltage supply )
GND: tied to power supply
IN: signal relay module trigger terminal ( high level trigger active )

Output section :
Normally open (NO): normally open relay , the relay does not suck timely , with the common disconnect suction timely and common terminal connected ;
Common terminal (COM): the relay common terminal ;
Normally Closed (NC): normally closed relay , relay no suction timely , and the common terminal connected, disconnect suction timely and public side .

High and low meaning:
High level trigger signal triggers the end refers to the (IN) and the negative power supply voltage between a forward , usually with positive power supply terminal is connected with the trigger a trigger , when the trigger -terminal positive voltage or reach the trigger voltage , the relay is energized .
Refers to a low level trigger signal triggers the end of the negative power supply voltage between OV , or said trigger terminal voltage than the power supply positive voltage lower , low enough to trigger voltage, the relay , which is usually the the negative power supply terminal is connected with the trigger a trigger , the relay is energized