Four channel Relay Shield 5V 4 Channel 4CH Relay Shield Module for Arduino
4-Channel Relay Driver Board is a shield based on Arduino, with no need for soldering and wires.
You just need download programs and complete experiment. This relay is controlled by 4 digital ports, namely D4, D5, D6 and D7. It works at high level ( relay closed) .
Indicator: four lights are red when the relay is driven high , the corresponding indicator will light up.
Can be directly plugged into the Arduino compatible the use of various types of motherboards.
Module features are as follows:
- Uses standard Arduino 5Vcc supply
- Standard Arduino Shield interfaces and shape
- Can continue to stack other Arduino expansion boards
- 3x M3 screw positioning holes for easy installation
- 4 High Level drive (5V or 3.3V) normally open contact is closed
- 5 Onboard relay indicator (LEDs)
Special Note: When using the Arduino UNO board connected to it, because UNO USB interface is extremely high, should avoid screw terminals pins are shorted its shell.
NOx = Normally open pin
COMx = Common pin
NCx =pin is normally closed pin
( i.e., when the relay is not driven , NOx and COMx are open between two pins , NCx and COMx are connected ; When the relay (x) control signal pin is high drive relays , NOx and COMx are connectied and open between NCx and COMx )
Relay Parameters: model HJR-4102-L-5V:
-Contact Material: Silver Alloy
-Load: Resistive load (COSФ=1)
-Contact Load: 3A@120VAC/24VDC ,1A@250VAC(TüV)
-Minimum load: 1mA 5VDC
-Max. Switching Voltage: 240VAC/60VDC
-Max. Switching Power: 360VA/90W
-Contact Resistance: 100mΩMax at 6VDC 1A
-Electrical life: 100,000 Operations(at30 Operations/minute)
-Mechanical life: 10,000,000 Operations(at300 Operations/minute)