ESP8266 ESP-01S 5V WiFi Relay Module,Click here
If you need the solid state relay module / DC control AC relay module 
If you need Relay Module Board Shield with Optocoupler 
Product description:
1 channel relay module
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- Maximum load: AC 250V/10A, DC 30V/10A
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- Trigger current: 5mA
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- Working voltage: 5V
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- Module size: 50 x 26 x 18.5mm (L x W x H)
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- Four mounting bolts holes, diameter 3.1mm
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- DC+: positive power supply (VCC)
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- DC-: negative power supply (GND)
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- IN: can be high or low level control relay
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- NO: normally open relay interface
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- COM: Common Interface Relays
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- NC: normally closed relay interface
2 channel relay module
1 Dimensions: 50.5mm (length) * 38.5mm (W) * 18.5 (H)
2 Weight:. 31g
3.PCB Color: Black
4 board four weeks with four screws holes, hole diameter 3.1mm, easy to install and fixed
5 relay of high quality loose music relays SPDT. A common terminal, a normally open, one normally closed terminal
6 optocoupler isolation, good anti-jamming
7 low pull, high release. Energisation status indicator light, release status LED is off
8.VCC of system power, JD_VCC relay power. You can plug in jumpers
Electrical parameters:
Supply voltage: 5VDC, 12VDC
Current: more than 100mA
Load: 250V 10A AC or 30V 10A DC
Wiring:
VCC: positive power supply system
GND: System power negative
IN1 - IN2: relay control ports
4-channel relay output modules, relay output contacts 250A 10A. Input IN1, IN2, IN3, IN4, the signal line LOW effective. VCC, GND power input, can relay a separate power supply relay power input of JD-VCC.
Uses:
1, support all MCU control.
2, the industrial sector;
3, PLC control;
4, smart home control
6 channel relay module
1. Maximum load on normally open pin: AC 250V/10A, DC 30V/10A.
2. Trigger current 5mA;
3. Power indicator light (green), relay status indicator light (red);
Module interface specifications:
1. DC+ : DC power supply positive pole
2. DC- : DC power supply negative pole
3. CH1~CH6 : : relay signal triggering pin
Relay output:
1. Normally closed pin (NC1~NC6) : relay normally closed pin
2. Common pin (COM1~COM6) : relay common pin
3. Normally opened pin (NO1~NO6) : relay normally opened pin
8 channel relay module
Features
Using high-current relay , AC250V 10A DC30V 10A
Contact some independent wiring , safe and reliable
Standard interface , can be extended in a variety of development board
With fixed screw holes for easy installation
Suitable for a variety of platforms such as 51/AVR/AVR/ARM
Module Description :
1 , the module complies with international safety standards , the load control area and regional isolation tank ;
2, using double-sided FR-4 circuit board design, high-end chip production process ;
3, using loose music authentic relay control ;
4, with the relay instructions , pull off, disconnect does not shine ;
5, the signal input has a low signal , often beginning with a common terminal will be turned on ;
6 , the relay can control the various devices and the load ;
7 , 8 and 8 normally open normally closed contact ;
8 , blue KF301 terminals to the control line is more convenient.
9 , Module size : 138m * 56mm * 18.5mm ( L * W * H ) , Weight : 120g
10 with 4 fixing bolt holes , hole 3.1mm, pitch 131mm * 49.5mm
11 , finished by 100% functional testing and stability testing
Two module interface :
1, VCC: 5V power supply connected to the positive
2, GND: 5V power supply connected to the negative
3, IN1-IN8: trigger signal , active low
Relay outputs : a 12- line interface, the interface can be directly connected to all leads , user-friendly
1, NO1 - NO8: normally open relay interfaces , relay before the vacant after the pull shorted with COM
2, COM1 - COM8 Relay Common Interface
3, NC1 - NC8: normally closed relay interface relay shorted with COM ago , after the pull- vacant
Tips: choose the same channel, and will pay less freight.
Tips: choose the same channel, and will pay less freight.
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