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diff --git a/docs/en/atom/atomhub_switch_d.md b/docs/en/atom/atomhub_switch_d.md
index 6e6fc696..d6c6b0af 100644
--- a/docs/en/atom/atomhub_switch_d.md
+++ b/docs/en/atom/atomhub_switch_d.md
@@ -6,7 +6,7 @@
## Description
-**Atom Hub Switch D** is a dual relay expansion kit. The D in the name stands for "Direct" since the power supply is directly connected to the relays. The AC/DC power supply flows to the NO(Normally Open) contacts of the two relays and can be controlled via the M5Atom. When in use, the user only needs to connect the electrical load to the relay, and there is no need to connect the power line separately. Compared with the previous relay control scheme, this module will be more concise and efficient in controlling the electric load. In addition to the power supply for the relay, the input power supply will also provide 5V/1A DC power supply for the ATOM through the built-in step-down module. In order to ensure the safety of use, the power input circuit has overheating and short-circuit protection, when the current is too high or a short circuit occurs It can effectively disconnect the circuit to prevent damage to the components. A built-in SP485EE level conversion chip, provides an RS485 communication interface to support multi-device communication. It also integrates a 9-24V step-down 5V circuit to adapt to the power demand in industrial scenarios, and expand power supply capabilities.
+**Atom Hub Switch D** is a dual relay expansion kit. The D in the name stands for "Direct" since the power supply is directly connected to the relays. The AC power supply flows to the NO(Normally Open) contacts of the two relays and can be controlled via the M5Atom. When in use, the user only needs to connect the electrical load to the relay, and there is no need to connect the power line separately. Compared with the previous relay control scheme, this module will be more concise and efficient in controlling the electric load. In addition to the power supply for the relay, the input power supply will also provide 5V/1A DC power supply for the ATOM through the built-in step-down module. In order to ensure the safety of use, the power input circuit has overheating and short-circuit protection, when the current is too high or a short circuit occurs It can effectively disconnect the circuit to prevent damage to the components. A built-in SP485EE level conversion chip, provides an RS485 communication interface to support multi-device communication. It also integrates a 9-24V step-down 5V circuit to adapt to the power demand in industrial scenarios, and expand power supply capabilities.
A pair of HY2.0-4P ports are included to connect to I2C peripherals or general I/O devices. Combined with ATOM's built-in Bluetooth and WIFI functions, ATOM HUB SWITCH D can quickly build remote device switch applications.
@@ -59,10 +59,14 @@ A pair of HY2.0-4P ports are included to connect to I2C peripherals or general I
| Relay Interface |
(NO,NC,COM) x2 |
- (NO(AC power supply), COM) x2 |
+ (NO(connect to the AC power L line), COM(connect to the AC power N line)) x2 |
+?>Please refer to the figure below for details
+
+
+
## Specification
diff --git a/docs/zh_CN/atom/atomhub_switch_d.md b/docs/zh_CN/atom/atomhub_switch_d.md
index fc7b542e..a4041b44 100644
--- a/docs/zh_CN/atom/atomhub_switch_d.md
+++ b/docs/zh_CN/atom/atomhub_switch_d.md
@@ -6,7 +6,7 @@
## 描述
-**ATOM HUB SWITCH D** 是一款专为ATOM主控适配的双路继电器电源控制开关，其中D表示着Directly(直接), 在设计上Switch D采用了电源输入直连继电器的方案。交流/直流电源直接流向两路继电器的NO(常开)触点，由ATOM进行通断控制。使用时，用户只需要将用电负载接入继电器既可，无需另外连接电源线路。与以往的继电器控制方案相比，这一款模块在控制用电负载上，会更加的简洁高效。
+**ATOM HUB SWITCH D** 是一款专为ATOM主控适配的双路继电器电源控制开关，其中D表示着Directly(直接), 在设计上Switch D采用了电源输入直连继电器的方案。交流电源直接流向两路继电器的NO(常开)触点，由ATOM进行通断控制。使用时，用户只需要将用电负载接入继电器既可，无需另外连接电源线路。与以往的继电器控制方案相比，这一款模块在控制用电负载上，会更加的简洁高效。
输入电源除了用于继电器负载供电，同时还将经过内置降压模块可为ATOM提供5V/1A的直流电源，为了保障使用安全，该电源输入电路具备过热与短路保护功能，当电流过大或发生短路时能有效断开电路，防止元器件损坏。内置SP485EE电平转换芯片，提供RS485通信接口支持多设备挂载通信，集成9-24V降压5V电路适应工业场景上的取电需求，拓展供电能力。引出了一组HY2.0-4P接口用于连接I2C外设或通用I/O设备。结合ATOM自带蓝牙与WIFI功能，ATOM HUB SWITCH D可以快速搭建远程设备开关应用。
@@ -59,10 +59,13 @@
| 继电器接口 |
(NO,NC,COM) x2 |
- (NO(直连AC电源), COM) x2 |
+ (NO(直连AC电源L线), COM(直连AC电源N线)) x2 |
+?>详情请参考下图
+
+
## 规格参数