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The Power Guard Phidget is designed to protect your hardware by detecting and preventing overvoltage and over-temperature situations. This board is designed for high current systems and is capable of protecting your equipment from even the largest of power spikes. This Phidget connects to your computer through a VINT Hub.
Use the SAF100 when the motor rated current is greater than 5A.
This Phidget is a smart device that must be controlled by a VINT Hub. For more information about VINT, have a look at the VINT Primer. You can use a Phidget Cable to simply and easily connect the two devices. Here's a list of all of the different VINT Hubs currently available:
|Image||Part Number||Price||Number of VINT Ports||Controlled By|
|HUB5000_0||$60.00||6||Local Network (Ethernet or Wi-Fi)|
Use a Phidget cable to connect this device to the hub. You can solder multiple cables together in order to make even longer Phidget cables, but you should be aware of the effects of having long wires in your system.
|Image||Part Number||Price||Cable Length|
This Phidget protects a power supply between 8 and 30V DC. Check the product page or data sheet of the device being powered to determine how much current is needed and what voltage range is permissable. Select the power supply from the list below that matches your region's wall socket type.
|Product||Electrical Properties||Physical Properties|
|Image||Part Number||Price||Power Supply Current||Output Voltage||Wall Plug Style|
|3022_0||$10.00||2 A||12 V||Australian|
|3023_1||$10.00||2 A||12 V||European|
|3024_1||$10.00||2 A||12 V||North American|
|3025_0||$10.00||2 A||12 V||British|
|3084_0||$1.50||500 mA||12 V||European|
|3085_0||$1.50||500 mA||12 V||North American|
|3086_0||$10.00||1 A||24 V||North American|
|PSU4013_0||$20.00||2.5 A||24 V||—|
|PSU4014_0||$40.00||5 A||24 V||—|
|PSU4015_0||$20.00||1 A||24 V||—|
|PSU4016_0||$40.00||15 A||24 V||—|
|PSU4017_0||$75.00||15 A||24 V||—|
|PSU4018_0||$20.00||5 A||12 V||—|
Welcome to the SAF1000 user guide! In order to get started, make sure you have the following hardware on hand:
Next, you will need to connect the pieces:
In order to demonstrate the functionality of the SAF1000, the Phidget Control Panel running on a Windows machine will be used.
The Phidget Control Panel is available for use on both macOS and Windows machines.
To open the Phidget Control Panel on Windows, find the icon in the taskbar. If it is not there, open up the start menu and search for Phidget Control Panel
To open the Phidget Control Panel on macOS, open Finder and navigate to the Phidget Control Panel in the Applications list. Double click on the icon to bring up the Phidget Control Panel.
For more information, take a look at the getting started guide for your operating system:
Linux users can follow the getting started with Linux guide and continue reading here for more information about the SAF1000.
After plugging the SAF1000 into your computer and opening the Phidget Control Panel, you will see something like this:
The Phidget Control Panel will list all connected Phidgets and associated objects, as well as the following information:
The Phidget Control Panel can also be used to test your device. Double-clicking on an object will open an example.
The Power Guard Phidget is designed to protect your hardware by detecting and preventing overvoltage and over-temperature situations. If the voltage or temperature exceeds the thresholds chosen in your program, it will automatically cut power. You can re-enable power via software when you’ve determined that conditions are safe to do so.
You can use your Control Panel to explore your Phidget's channels.
1. Open your Control Panel, and you will find the following channels:
2. Double click on a channel to open an example program. Each channel belongs to a different channel class:
In your Control Panel, double click on "Power Supply Protector":
In your Control Panel, double click on "Temperature Sensor":
In your Control Panel, double click on "Voltage Sensor":
Before you open a Phidget channel in your program, you can set these properties to specify which channel to open. You can find this information through the Control Panel.
1. Open the Control Panel and double-click on the red map pin icon:
2. The Addressing Information window will open. Here you will find all the information you need to address your Phidget in your program.
See the Phidget22 API for your language to determine exact syntax for each property.
In the Phidget Control Panel, open the channel for your device and click on the icon next to the data type that you want to plot. This will open up a new window:
If you need more complex functionality such as logging multiple sensors to the same sheet or performing calculations on the data, you'll need to write your own program. Generally this will involve addressing the correct channel, opening it, and then creating an Event Handler and adding graphing/logging code to it.
The quickest way to get started is to download some sample code for your desired programming language and then search google for logging or plotting in that language (e.g. "how to log to csv in python") and add the code to the existing change handler.
Starting from firmware version 110, using Phidget22 library versions 22.214.171.12490107 and later, this device supports the use of a failsafe feature to put your device in a safe state should your program hang or crash.
With this feature, the PowerGuard channel on this device has a settable failsafe timer.
If the failsafe is not enabled, the device will behave as it did before the addition of this feature, maintaining the last state it received until it is explicitly told to stop.
Enabling the failsafe feature for a channel starts a recurring failsafe timer. Once the failsafe timer is enabled, it must be reset within the specified time or the channel will enter a failsafe state. Resetting the failsafe timer will reload the timer with the specified failsafe time, starting when the message to reset the timer is received by the Phidget.
For example: if the failsafe is enabled with a failsafe time of 1000ms, you will have 1000ms to reset the failsafe timer. Every time the failsafe timer is reset, you will have 1000ms from that time to reset the failsafe again.
If the failsafe timer is not reset before it runs out, the channel will enter a failsafe state. For PowerGuard channels, this will disable the power output. Once the channel enters the failsafe state, it will reject any further input until the channel is reopened.
To prevent the channel from falsely entering the failsafe state, we recommend resetting the failsafe timer as frequently as is practical for your applicaiton. A good rule of thumb is to not let more than a third of the failsafe time pass before resetting the timer.
Once the failsafe has been enabled, it cannot be disabled by any means other than closing and reopening the channel.
When you use a failsafe in your program, we strongly recommend setting up an error event handler to catch the Failsafe Error Event, to allow your program to catch the failsafe event.
If you want your program to try to automatically recover from a failsafe state, you can close and re-open the channel from the error event handler after determining a failsafe condition caused the event.
|Power Supply Protector|
|Overvoltage Setting||Selectable via software 8 - 33 VDC|
|Overtemperature Trigger||125 °C|
|Sampling Interval Min||100 ms/sample|
|Sampling Interval Max||60 s/sample|
|Fan Trigger||75 °C|
|Continuous Current||50 A|
|Current Consumption Min (VINT Port)||100 μA|
|Supply Voltage Min||8 V DC|
|Supply Voltage Max||30 V DC|
|Power Consumption||250 mW|
|Recommended Wire Size||6 - 14 AWG|
|Operating Temperature Min||-40 °C|
|Operating Temperature Max||85 °C|
|Canadian HS Export Code||8471.80.00|
|American HTS Import Code||8471.80.40.00|
|Country of Origin||CN (China)|
|Date||Board Revision||Device Version||Comment|
|August 2017||0||101||Product Release|
|January 2018||0||102||Increased change trigger limit from 25V to 32V|
|May 2019||0||110||Added failsafe timer functionality|
|Power Supply Protector||PowerGuard||0|
|PowerGuard||Visual Studio GUI||C#||Windows||Download|
|PowerGuard||Visual Basic .NET||Windows||Download|
|VoltageInput||Visual Studio GUI||C#||Windows||Download|
|VoltageInput||Visual Basic .NET||Windows||Download|
|TemperatureSensor||Visual Studio GUI||C#||Windows||Download|
|TemperatureSensor||Visual Basic .NET||Windows||Download|