BEM401 LAN/Internet 2ch peer to peer relay board pair

  • Model: BEM401
  • Shipping Weight: 78g
  • 9759 Units in Stock
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Related Download

Click here to download manual and control software


Virtual LAN Service

Virtual LAN provides a secured and encrypted virtual local area network for all your devices with Internet access.

With Virtual LAN you can easily access any device/PC without public IP in Internet just the same way as they are connected to your local router.

Your PC/devices can be located at different country/city, and different subnets. You can still access each other with a local area network IP

Virtual LAN will let you easily share folders, build web server or create all other service in Virtual LAN without considering the complexity of Internet


Click here to get Virtual LAN Service




This product includes a pair of boards

Each board contains 1 input and 1 output

Contact closure detect input

Hardware Reset Button

Password Protection

DHCP Function

Easy Bus

Http Web Control

LAN Control

Encrypted Communication over Internet

Firmware update over Internet

RealTime Online Support Service Chat


Output Electric Specifications

Relays have Normally Open (NO) and
Normally Closed (NC) Contacts each capable of switching max:
- 12VDC/10A
- 24VDC/10A
- 125VAC/10A
- 250VAC/10A


Supply Electric Specifications

DC 5 - 24V  / 200mA power supply (wide range input)


Operating Temperature

Industrial ( -30°C to +80°C)



75 mm / 50 mm / 20 mm



Board - A1

IP address:
Subnet Mask:
Default Gateway:

Board - A2

IP address:
Subnet Mask:
Default Gateway:




Communication Bus: Ethernet

Control Protocol 1: Easy Bus

Control Protocol 2: Http


Mirror pair relay over Ethernet


Mirror pair relay board allow contact closure inputs to control relays in a remote location using a two board design.

Two boards(A1 and A2) are both equipped with one sensor input and one relay output. Both boards(A1 and A2) are included when you purchase BE-M401.


Mirror pair relay input & output


The relay on the each board can be used to interrupt the power of a device you are switching and also as a dry contact closure output.

Applications where you need to extend the range of a contact closure over a distance the BE-M401 will work.

BE-M401 allows you to connect your input and output at very different locations.


What is mirror pair relay board?


Mirror pair relay board uses a simple contact closure to trigger a relay via a LAN or internet connection without a computer.

Control a relay remotely with BE-M401 that have separate boards in separate locations that work together as a mirror pair to control relays.

Each input of local BE-M401 is mirrored to one output of another BE-M401 remotely, with internet connection you can easily have a distance free control.



What is Easy Bus?

Easy Bus is an innovative control bus, which not working with

address and registers, but rather work with human natural language.

For example, to switch on/off channel 1, you may directly send

ASCII words "k01 = 1" or "k01 = 0" to BE-M401. This is extremely easy to use.



Package Included:

Item 1: LabVIEW EASYBUS-TCP, Source Code

item 2: User Operation Manual




Customized Design & Technical Support


If you have technical questions or customized design requirement,

please contact us to get support from our engineers team.

You may send your information to Email: