You need several USB relays in a tight form factor? The Yocto-MaxiPowerRelay controls 5 relays. Each of these relays can handle up to 250V and 5 Amp. The relay state is reflected by a LED. This module does not need external power, but the host computer or the hub to which the module is connected must be able to provide up to 250 mA.

Be aware that although these relays have a better endurance to inductive loads than the Yocto-PowerRelay-V2, using a relay to drive inductive loads (motors, transformers) may lead to accelerated aging of the relay. Please refer to the documentation for hints on reducing this type of problems.

This device can be connected directly to an Ethernet network using a YoctoHub-Ethernet, to a WiFi network using a YoctoHub-Wireless-n and to a GSM network using a YoctoHub-GSM.

Enclosure available separately Yocto-MaxiPowerRelay Yocto-MaxiPowerRelay

USB cables and enclosures to be ordered separately.

CHF 60.54

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Hardware release:Rev. D
Product name:Yocto-MaxiPowerRelay
USB connector:micro-B
Relay type:OMRON G6RL-14-ASI
Max switching current:5A
Max switching power:1250VA
Operate time:12ms (max)
Release time:7ms (max)
Max withholding voltage:1000V r.m.s.
Max working voltage:250V r.m.s.
Protection class, according to IEC 61140:class II
USB isolation, clearance dist.:10mm
USB isolation, creepage dist.:10mm
USB isolation, dielectric strength:5kV r.m.s.
Normal operating temperature:5...40░C
Extended operating temperature2:-30...85░C
USB consumption:~250mA
Supported Operating Systems:Windows (PC + IoT), Linux (Intel + ARM), macOS, Android
Drivers:Driverless, no driver needed
API / SDK / Libraries:C++ Obj-C C# VB.NET UWP Delphi Python Java Android LabVIEW
API / SDK / Libraries (TCP only):Javascript Node.js PHP
RoHS compliance:RoHS III (2011/65/UE+2015/863)
Suggested enclosure:YoctoBox-MaxiIO-Transp
Harmonized tariff code:9032.9000
Made in:Switzerland

1 These specifications are for the current hardware revision. Specifications for earlier revisions may differ.
2 The extended temperature range is defined based on components specifications and has been tested during a limited duration (1h). When using the device in harsh environments for a long period of time, we strongly advise to run extensive tests before going to production.

Accessories and related products

YoctoBox-MaxiIO-Transp, Clear plastic enclosure for the Yocto-Maxi-IOUSB-A-MicroB-50, USB 2.0 type A to Micro-B data cable, 50 cmYoctoHub-Ethernet, Ethernet-enabled hub for Yoctopuce modules

Related articles and application examples


User manual (HTML)
User manual (PDF)
Product brief
3D file (STEP)
RoHS certificate
REACH certificate
Most recent firmware54544 (05/12/2023)
Programming libraries61813 (07/05/2024)
Command line API61813 (07/05/2024)
VirtualHub application61813 (07/05/2024)

Add a comment 6 comments

1 - webjoy Monday,october 10,2016 10H04

Do I need an USB entry to every activity

<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"/>

<meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" />

My device ask every time I connect the USB to the it, whether I want to give access to it or not. I activate the checkbox too,that should make the relay as a default usb connect.

I use <uses-feature android:name="android.hardware.usb.host"/>
as well in the manifest

What can I do to make the relay as default relay to a device.

2 - seb (Yocto-Team)Monday,october 10,2016 10H23

@webjoy: You do not need to add "android.hardware.usb.action.USB_DEVICE_ATTACHED" for every activity but only to the one that you want to start when de Yocto-MaxiPowerRelay is plugged.

In our application we have only one Activity that have the "android.hardware.usb.action.USB_DEVICE_ATTACHED" option, and depending of the state of the application we start one activity or another. See the app "Doc-Example" in the Android Library.

Regarding the "use as default" checkbox, Android has strange limitation: If your application is already started when you plug the device, the "use as default" option will be cleared on the next reboot. So if you want to get ride of this pop-up you need to ensure that your application is not running the first time that you plug the Yocto-MaxiPowerRelay.

If you still have trouble with the "android.hardware.usb.action.USB_DEVICE_ATTACHED" you can contact the support (support@yoctopuce.com).

3 - webjoy Tuesday,november 15,2016 16H13

Is it possible to use 2 Yocto-MaxiPower Relay at one android pc? One relay works fine, but 2 relais crashes.

4 - mvuilleu (Yocto-Team)Tuesday,november 15,2016 16H15

Yes, it should be no problem unless you are using Android 5.0 or 5.1, because of a bug introduced by Android 5.0 USB kernel. We have submitted a bug report to Android, and but the fix has only been made in Android 6.0 and not Android 5.x.

5 - webjoy Wednesday,november 16,2016 9H18

It is Android 5.1... Is it possible to use an Ethernet connector like YoctoHub-Ethernet with Android 5.1 or maybe a USB-hub ?

6 - mvuilleu (Yocto-Team)Wednesday,november 16,2016 14H39

@webjoy: Yes, going through Ethernet would work around the problem, since the Android bug is in the USB stack

Yoctopuce, get your stuff connected.