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When the 3.3V digital output mode of your VINT port is not enough, this output module adds four PWM-enabled solid state relay outputs to your system. Because it uses relay outputs, you can control more powerful devices that require up to 30V and 8A. LED strips, DC motors, power relays, fans and other small circuits are just a few examples of what can be controlled with this module. The REL1100 connects to a port on a VINT Hub. See the Connection & Compatibility tab for a list of hubs.
Each solid state relay switches an external circuit to ground when enabled. This action allows completion of the circuit in order to power a load. The power to the load is supplied externally and should be connected in series with the load and the relay output. Alternatively, you could use a pull-up resistor on the input of your load and then switch the input to ground when you want it to turn off. Each channel has a ground terminal beside it to make wiring a snap, and each one leads to a common ground.
In addition to switching at microsecond speeds, each relay output is also capable of pulse-width modulation; rather than simply switching on or off, you can select a percentage duty cycle to limit the power being supplied to a specific level. This allows you to control devices like a dimmer would, which is an important feature for LEDs, fans, and motors. Check the datasheet for your device to ensure that it is designed to be used with PWM (some devices such as incandescent or CF bulbs are not designed for dimming).
The VINT port on this board is electrically isolated from the rest of the board, improving stability by eliminating ground loops.
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.
Welcome to the REL1100 user guide! In order to get started, make sure you have the following hardware on hand:
Next, you will need to connect the pieces:
Now that you have everything together, let's start using the REL1100!
In order to demonstrate the functionality of the REL1100, 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 REL1100.
After plugging the REL1100 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.
Double-click on a Digital Output object , labelled Digital Output Isolated, in order to run the example:
General information about the selected object will be displayed at the top of the window. You can also experiment with the following functionality:
Before you can access the device in your own code, and from our examples, you'll need to take note of the addressing parameters for your Phidget. These will indicate how the Phidget is physically connected to your application. For simplicity, these parameters can be found by clicking the button at the top of the Control Panel example for that Phidget.
In the Addressing Information window, the section above the line displays information you will need to connect to your Phidget from any application. In particular, note the Channel Class field as this will be the API you will need to use with your Phidget, and the type of example you should use to get started with it. The section below the line provides information about the network the Phidget is connected on if it is attached remotely. Keep track of these parameters moving forward, as you will need them once you start running our examples or your own code.
You are now ready to start writing your own code for the device. The best way to do that is to start from our Code Samples.
Select your programming language of choice from the drop-down list to get an example for your device. You can use the options provided to further customize the example to best suit your needs.
Once you have your example, you will need to follow the instructions on the page for your programming language to get it running. To find these instructions, select your programming language from the Programming Languages page.
Starting from firmware version 110, using Phidget22 library versions 126.96.36.19990107 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, each Digital Output channel on this device has its own independently 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 or duty cycle 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 Digital Output channels, this sets the output to a FALSE state. On the REL1100 this opens the relay contact. 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.
Outputs on the RELL1100 behave similarly to a solid state relay - by toggling the state of the output, you can switch a circuit on and off. Specifically, changing the output state will switch a connection between the output and ground terminals. The outputs are also PWM-enabled, which means they can vary the intensity of the output by setting a duty-cycle.
These outputs are designed for use with DC voltages only.
To switch a load with the REL1100, connect the load and power supply to any pair of output and ground terminals, as pictured to the right. The load could be a larger relay, a solenoid, LEDs, light bulbs, motors, etc. Check the specification table on the product page for your Phidget to ensure that the voltage or current required by your load does not exceed the maximum.
Multiple circuits with multiple supplies may be controlled by the REL1100 at the same time. Just be aware the grounds of all switched circuits will be shared, as all ground terminals on the REL1100 are connected internally.
The Isolated Solid State Relay Phidget is capable of switching loads of up to 240W. However, for power higher than 50W, you'll need some form of cooling to keep the heat of the transistors down at normal levels. The REL1100's strengths lie in its multiple, high switching speed outputs. For high power projects, a hockey puck type SSR may be a better choice.
|Current Consumption Min||3.5 mA|
|Current Consumption Max||4 mA|
|Load Voltage Max (DC)||30 V DC|
|Load Current Max (DC)||8 A|
|Switching Power Max (Real)||* 240 W|
|Number of Relays||4|
|Contact Resistance Max||35 mΩ|
|Turn-off Time Max||100 ns|
|Switch Type||SPST Normally Open MOSFET|
|Turn-on Time Max||100 ns|
|PWM Resolution||0.1 %|
|PWM Frequency Max||16 kHz|
|Recommended Wire Size||16 - 26 AWG|
|Operating Temperature Min||-40 °C|
|Operating Temperature Max||85 °C|
* Note: At switching powers powers higher than 50W, external cooling may be required. For high power applications, a hockey-puck style SSR may be more appropriate. See the "Other Relays" tab for more details.
|Date||Board Revision||Device Version||Comment|
|June 2017||0||100||Product Release|
|May 2019||0||110||Added failsafe timer functionality|
|February 2020||0||120||Added ability to set PWM frequency; see API for details|
|Digital Output Isolated||DigitalOutput||0 - 3|
|DigitalOutput||Visual Studio GUI||C#||Windows||Download|
|DigitalOutput||Visual Basic .NET||Windows||Download|
|Image||Part Number||Price||Load Current Max (AC)||Load Voltage Max (AC)||Load Current Max (DC)||Load Voltage Max (DC)|
|1014_2B||$55.00||12 A||277 V AC||7 A||* 30 V DC|
|1017_1B||$85.00||2 A||250 V AC||2 A||* 120 V DC|
|3051_1||$19.00||12 A||277 V AC||7 A||* 30 V DC|
|3052_1||$15.00||2.5 A||28 V AC||2.5 A||40 V DC|
|3053_0||$30.00||(per channel) 9 A||28 V AC||(per channel) 9 A||40 V DC|
|3054_0||$10.00||500 mA||28 V AC||500 mA||40 V DC|
|REL1000_0||$30.00||12 A||277 V AC||7 A||* 30 V DC|
|REL1100_0||$25.00||—||—||8 A||30 V DC|
|REL1101_0||$50.00||—||—||8 A||30 V DC|
|REL2001_0||$10.00||12 A||277 V AC||7 A||* 30 V DC|
|REL2002_0||$12.00||2 A||240 V AC||2 A||120 V DC|
|REL2103_0||$15.00||10 A||30 V AC||* 10 A||30 V DC|
For applications with a higher switching power, Hockey Puck style relays are the more robust choice:
|Image||Part Number||Price||Control Voltage Min||Control Voltage Max||Load Voltage Min (DC)||Load Voltage Max (DC)||Load Voltage Max (AC)|
|3950_0||$20.00||4 V DC||32 V DC||—||30 V DC||—|
|3951_0||$25.00||4 V DC||32 V DC||—||50 V DC||—|
|3952_0||$30.00||4 V DC||32 V DC||—||30 V DC||—|
|3953_1||$15.00||4 V DC||32 V DC||—||—||280 V AC|
|3958_0||$45.00||3 V DC||32 V DC||5 V DC||120 V DC||—|