---
title: Actuate for USB Powered Devices
slug: actuate-for-usb-powered-devices
docTags: 
createdAt: 2026-01-24T20:49:54.840Z
---

The ACTUATE-RELAY 4CH expands our automation product range. A differential feature of the Scalae 4CH is the onboard power supply, which enables the board to be powered by an AC power source, i.e. the PCB can be directly powered from a transformer. Alternatively, a DC power source can be used.

This iteration swops out PCB terminal connectors for USB Type B Sockets.

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## Actuate For USB Powered Devices 

The key aspects of the Actuate Relay for USB Powered devices are listed below:
\- It's designed to be fitted into a DIN RAIL enclosure
\- USB Type B sockets make all connections to the PCB
\- Power connection more reliable

## Actuate Features


The Actuate 4 CH includes the following features:

| **Feature**         | **Description** |
| ------------------- | --------------- |
| Power Supply        | DC  \| AC       |
| Opto Coupled Inputs | 4               |
| Relay Outputs       | 4               |



:::hint{type="info"}
 Input 1 is directly coupled to output 1, etc
:::


Product Application
===================

The 4-channell board is ideal for smaller-scale applications where the MCU or system does not need to connect to more than 4 high-powered devices. If more than 8 I/O is required, the [Actuate Relay 8 Channel](docId\:GtAuBdglmEuAHI2QwqIUJ) would provide expanded I/O capability, or two 4-channel PCBs can be used, depending on the requirements.