5V 8-Channel Relay Module

八通道继电器模块包含八个5V继电器以及相关的开关和隔离组件，这使得与微控制器或传感器的接口变得轻松，具有最小的组件和连接。板上的每个继电器都有相同的电路，并且输入接地对于所有八个通道都是共同的。

八通道中继模块引脚

Pin Number	Pin Name	描述
1	GND	模块的地面参考
2	在1	Input to activate relay 1
3	in2	Input to activate relay 2
4	in3	Input to activate relay 3
5	in4	Input to activate relay 4
6	in5	Input to activate relay 5
7	in6	Input to activate relay 6
8	in7	Input to activate relay 7
9	in8	Input to activate relay 8
10	VCC	继电器模块的电源
11	GND	模块的地面参考
12	VCC	Power supply selection jumper
13	RY-VCC	继电器模块的替代动力别针

八通道中继模块上存在的组件

以下是八通道中继模块上存在的主要组件，该模块将在文章后面详细描述。

5V relay, terminal blocks, male headers,transistors,optocouplers,二极管， 和LED.

八通道继电器模块Specifications

• 电源电压 - 3.75V至6V
• Trigger current – 5mA
• 当继电器处于活动状态时 - 〜70mA（单），〜600mA（全八个）
• Relay maximum contact voltage – 250VAC, 30VDC
• 继电器最大电流 - 10A

Alternate Relay Modules

Single-channel relay module,dual-channel relay module,four-channel relay module.

Alternate Modules

SCRs,leyu.app ，固态继电器模块。

了解5V八通道中继模块

八通道继电器模块包含八个5V继电器以及相关的开关和隔离组件，这使得与微控制器或传感器的接口变得轻松，具有最小的组件和连接。There are eight terminal blocks with six terminals each, and each block is shared by two relays. The terminals are screw type, which makes connections to mains wiring easy and changeable.

模块上的八个继电器的额定值为5V，这意味着当线圈上约有5V时，该中继被激活。在每种情况下，每个中继的触点均为250VAC和30VDC和10A指定，如继电器主体上所标记的。The switching transistors act as a buffer between the relay coils that require high currents, and the inputs which don’t draw much current. They amplify the input signal so that they can drive the coils to activate the relays.

The freewheeling diodes prevent voltage spikes across the transistors when the relay is turned off since the coils are an inductive load. The indicator LEDs glow when the coil of the respective relay is energized, indicating that the relay is active.

The optocouplers form an additional layer of isolation between the load being switched and the inputs. The isolation is optional and can be selected using the VCC selector jumper. The input jumper contains the main VCC, GND, and input pins for easy connection using female jumper wires.

Internal Circuit Diagram for Eight-Channel Relay Module

板上的电路如下：

板上的每个继电器都有相同的电路，并且输入接地对于所有八个通道都是共同的。

与传统的继电器驾驶电路相比，该继电器模块的驱动电路略有不同，因为有可选的隔离层。当跳投短路时，继电器和输入共享相同的VCC，并且在打开时，必须向JD-VCC跳线提供分开的电源，以为中继线圈和OptOcOupler输出供电。

该模块的输入很低，这意味着当输入标头上的信号低时激活继电器。这是因为指示器LED和OptoCOPOPLER的输入串联连接到一端的VCC引脚，因此另一端必须连接到地面以启用电流流量。此处使用的OptoCOPOPLER是PCF817，它是一种常见的光电耦合器，也可以在整个孔包装中找到。

How to Use the Eight-Channel Relay Module

八通道可用于同时切换多个负载，因为同一模块上有八个继电器。这对于创建可以从多个远程负载的中心枢纽创建中央集线器很有用，这对于可以将模块放置在主机的任务之类的任务很有用，可以连接到房屋其他部分的负载，并且可以是使用微控制器从中央位置进行控制。

In this diagram, eight separate loads (represented by lightbulbs) have been connected to the NO terminals of the relay. The live wire has been connected to the common terminal of each relay. When the relays are activated, the load is connected to the live wire and is powered.This setup can be reversed by connecting the load to the NC terminal, which will keep it powered on till the relay is activated.

八通道继电器模块Basic Troubleshooting

If either of the relays does not turn on:

1. The contacts might be welded due to overcurrent/arcing. Shaking the module firmly might help unstick the contacts.
2. 驾驶员电路可能由于过电压而损坏。
3. Input polarity might be incorrect.
4. Jumper might not have been moved to the correct position

八通道继电器模块Applications

• Switching mains loads
• 家庭自动化
• Battery backup
• 高电流负载开关