--- title: Digital I/O System for Raspberry Pi® Allied Electronics description: Allied Electronics customers can use Opto 22's digital I/O carrier board and the power of industrial digital input/output I/O with a Raspberry Pi. --- - [Log in](https://www.opto22.com/logon?returnurl=%2f) - [Register](https://www.opto22.com/Special-Pages/Logon.aspx) - [Your Cart](https://www.opto22.com/Checkout/Shopping-Cart) - [Contact Us](https://www.opto22.com/support/contact-us) [![Opto 22 Logo](https://info.opto22.com/hubfs/opto22_lightsilvergradient_800px.png "Opto 22 Logo")](https://www.opto22.com) - [Products](https://www.opto22.com/products) - [What Do You Want to Do?](https://www.opto22.com/products/what-do-you-want-to-do) - [groov RIO](https://www.opto22.com/products/groov-rio) - [groov EPIC System](https://www.opto22.com/products/groov-epic-system) - [Case Studies](https://www.opto22.com/products/groov-case-studies) - [Product Selector](https://www.opto22.com/products/product-selector) - [Product Families](https://www.opto22.com/products/product-families) - 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[Privacy Policy](https://www.opto22.com/support/privacy) - [About Us](https://www.opto22.com/about-us) - [History](https://www.opto22.com/about-us/history) - [Location](https://www.opto22.com/about-us/directions) - [Corporate Contacts](https://www.opto22.com/about-us/corporate-contacts) - [Opto 22 Product Philosophy](https://www.opto22.com/about-us/opto-22-product-philosophy) - [Customer Quotes/Testimonials](https://www.opto22.com/about-us/customer-quotes-testimonials) - [Virtual Tour](https://www.opto22.com/about-us/virtual-tour) - [Pressroom](https://www.opto22.com/about-us/pressroom) - [Distributors](https://www.opto22.com/about-us/distributors) - [International](https://www.opto22.com/about-us/international) - [Sustainability](https://www.opto22.com/about-us/sustainability) - [Careers](https://www.opto22.com/about-us/careers) - [Community](https://www.opto22.com/community) - [OptoPartners](https://www.opto22.com/community/opto-partners) - [Technology Partners](https://www.opto22.com/community/technology-partners) - [Education Partnerships](https://info.opto22.com/partnering-in-education) - [Opto Blog](https://blog.opto22.com/) - [Opto Forums](http://forums.opto22.com/) - [Events](https://www.opto22.com/community/events) - [Articles](https://www.opto22.com/articles) - [Log In](https://www.opto22.com/logon) - [Register](https://www.opto22.com/Special-Pages/Logon.aspx) - [Your Cart](https://www.opto22.com/Checkout/Shopping-Cart) - [Contact Us](https://www.opto22.com/support/contact-us)   # OLP: Raspberry Pi I/O - Allied Electronics # Good news, Allied Electronics customers and Raspberry Pi users: Now you can have your Raspberry Pi...and industrial I/O, too! ### ![Allied Electronics](https://info.opto22.com/hs-fs/hubfs/allied_logo_w_border.png?width=250&name=allied_logo_w_border.png "Allied Electronics") [![Raspberry Pi logo](https://info.opto22.com/hs-fs/hubfs/raspberry_pi_logo_reg_100x118.png?width=100&name=raspberry_pi_logo_reg_100x118.png "Raspberry Pi logo")](http://www.raspberrypi.org)With Opto 22's Digital I/O System for Raspberry Pi®, you can harness the power of world-class, industrial digital input/output (I/O) modules for monitoring and control through your Raspberry Pi.  Your Pi can switch real-world electrical loads like industrial motors and pumps, and sense status through industrial-grade sensors. It's ideal for prototypes, proofs of concept, and environments in which an industrially hardened controller is not required. You can use your favorite Pi-supported programming language like Python, Node-RED, Pi Terminal, Pi Filesystem GPIO, and many more ([see code samples on developer.opto22.com](http://developer.opto22.com/pi/pi-code-samples/) for details). Then, choose from a wide variety of digital I/O modules to fit what you want to do.  **Here's what you need:** - [Raspberry Pi](http://www.alliedelec.com/raspberry-pi/) (any model with a 40-pin GPIO header connector, including Raspberry Pi 1 Models A+ and B+, Pi 2 Model B, Pi 3 Model B, and Pi Zero) - [Digital I/O Carrier Board for Raspberry Pi](https://info.opto22.com/raspberry-pi-io-allied#cb)  - [I/O mounting rack](https://info.opto22.com/raspberry-pi-io-allied#rack) - [I/O modules](https://info.opto22.com/raspberry-pi-io-allied#io) needed for your application - [Power supply](https://info.opto22.com/raspberry-pi-io-allied#ps) ![Raspberry Pi Industrial I/O](https://info.opto22.com/hs-fs/hubfs/Products/Raspberry-Pi-Industrial-IO.png?width=1903&name=Raspberry-Pi-Industrial-IO.png "Raspberry Pi Industrial I/O") ### **Digital I/O Carrier Board for Raspberry Pi** **(OPTO-P1-40P):** The OPTO-P1-40P carrier board (Allied part number [70956027](http://www.alliedelec.com/opto-22-opto-p1-40p/70956027/)), provides a GPIO interface between your Raspberry Pi and Opto 22 digital I/O modules on select mounting racks. Interface cable and Pi board mounting standoffs included. [![Order from Allied](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/2c21df57-05d5-4b25-a19e-e4de78e9c479.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/2c21df57-05d5-4b25-a19e-e4de78e9c479) Just plug the carrier board's interface cable into your Pi's 40-pin GPIO connector, and snap the board onto a compatible Opto 22 I/O mounting rack. [See the GPIO pinout diagrams.](https://info.opto22.com/hubfs/Pi_SNAP_G4_800w.jpg?t=1481671556445) --- ### I/O Mounting Racks—Choose one based on the number of I/O modules you need: **Choose G4 or SNAP I/O:** **G4 I/O** has only 1 point per module. (The image above shows a G4 system with 16 points.) Each output module is individually fused and can switch up to 3 A. - [70133597](http://www.alliedelec.com/opto-22-g4pb16h/70133597/) - (Opto 22 part #G4PB8H) Holds 8 G4 I/O modules (8 points) - [70133598](http://www.alliedelec.com/opto-22-g4pb16h/70133598/) - (Opto 22 part #G4PB16H) Holds 16 G4 I/O modules (16 points) **SNAP I/O** takes up less space with 4 points per module and costs less per point. (The image below shows a SNAP system with 16 points.) Most output modules can switch up to 0.75 A per point or a total of 3 A per module. SNAP-OMR6 modules can switch up to 6 A. - [70133461](http://www.alliedelec.com/opto-22-snap-d4m/70133461/) - (Opto 22 part #SNAP-D4M) Holds 4 SNAP I/O modules (16 points) ![Raspberry Pi with Opto 22 SNAP I/O modules and carrier board](https://info.opto22.com/hs-fs/hubfs/pi_board_w_snap_top_400x200.png?width=400&name=pi_board_w_snap_top_400x200.png "Raspberry Pi with Opto 22 SNAP I/O modules and carrier board") Note for customers who prefer to use Quad Pak or G1 I/O digital modules: the carrier board also supports the following racks: [70133623](http://www.alliedelec.com/opto-22-pb16hq/70133623/), [70133580](http://www.alliedelec.com/opto-22-pb4h/70133580/), [70133581](http://www.alliedelec.com/opto-22-pb8h/70133581/) and [70133582](http://www.alliedelec.com/opto-22-pb16h/70133582/). --- ### I/O Modules—Choose I/O based on the sensors and actuators you will connect to: [G4 I/O modules](https://info.opto22.com/raspberry-pi-io-allied#G4) (use with G4 racks) [SNAP I/O modules](https://info.opto22.com/raspberry-pi-io-allied#SNAP) (use with SNAP rack) For more details on compatible modules & racks, see [Digital I/O for Raspberry Pi Selection Guide](http://www.opto22.com/site/documents/doc_drilldown.aspx?aid=4594). **G4 Inputs (1 point each)** | **Sensor signal required** | **Allied part number** | **Opto 22 part number** | | --- | --- | --- | | 90–140 VAC/VDC | [70133525](http://www.alliedelec.com/opto-22-g4iac5/70133525/) | G4IAC5 | | 180–280 VAC/VDC | [70133640](http://www.alliedelec.com/opto-22-g4iac5a/70133640/) | G4IAC5A | | 90–140 VAC/VDC, low input impedance | [70133641](http://www.alliedelec.com/opto-22-g4iac5-l/70133641/) | G4IAC5L | | 90–140 VAC/VDC, with manual/auto switch | [70133526](http://www.alliedelec.com/opto-22-g4iac5ma/70133526/) | G4IAC5MA | | 10–32 VDC | [70133532](http://www.alliedelec.com/opto-22-g4idc5/70133532/) | G4IDC5 | | 2.5–28 VDC, low-voltage input | [70133534](http://www.alliedelec.com/opto-22-g4idc5d/70133534/) | G4IDC5D | | 35–60 VDC | [70133642](http://www.alliedelec.com/opto-22-g4idc5g/70133642/) | G4IDC5G | | 10–32 VDC, with manual/auto switch | [70133537](http://www.alliedelec.com/opto-22-g4idc5ma/70133537/) | G4IDC5MA | | Digital Input Switch (to simulate an input) | [70133531](http://www.alliedelec.com/opto-22-g4swin/70133531/) | G4SWIN | **G4 Outputs (1 point each)** | **Actuator signal required** | **Allied part number** | **Opto 22 part number** | | --- | --- | --- | | 12–140 VAC | [70133541](http://www.alliedelec.com/opto-22-g4oac5/70133541/) | G4OAC5 | | 24–280 VAC, normally open | [70133542](http://www.alliedelec.com/opto-22-g4oac5a/70133542/) | G4OAC5A | | 24–280 VAC, normally closed | [70133543](http://www.alliedelec.com/opto-22-g4oac5a5/70133543/) | G4OAC5A5 | | 12–140 VAC, with manual/auto switch | [70133546](http://www.alliedelec.com/opto-22-g4oac5ma/70133546/) | G4OAC5MA | | 24–280 VAC, with manual/auto switch | [70133651](http://www.alliedelec.com/opto-22-g4oac5ama/70133651/) | G4OAC5AMA | | 5–60 VDC | [70133552](http://www.alliedelec.com/opto-22-g4odc5/70133552/) | G4ODC5 | | 5–200 VDC | [70134080](http://www.alliedelec.com/opto-22-g4odc5a/70134080/) | G4ODC5A | | 5–60 VDC, with manual/auto switch | [70133555](http://www.alliedelec.com/opto-22-g4odc5ma/70133555/) | G4ODC5MA | | Digital Output Switch, 250 VAC/VDC (to simulate an output) | [70133528](http://www.alliedelec.com/opto-22-g4swout/70133528/) | G4SWOUT | #### SNAP Inputs (4 points each) | **Actuator signal required** | **Allied part number** | **Opto 22 part number** | | --- | --- | --- | | 90-140 VAC/VDC | [70133450](http://www.alliedelec.com/opto-22-snap-iac5/70133450/) | SNAP-IAC5 | | 180-280 VAC/VDC | [70133451](http://www.alliedelec.com/opto-22-snap-iac5a/70133451/) | SNAP-IAC5A | | 90-140 VAC/VDC, isolated, with manual/auto switch | [70134081](http://www.alliedelec.com/opto-22-snap-iac5ma/70134081/) | SNAP-IAC5MA | | 10-32 VAC/VDC | [70133452](http://www.alliedelec.com/opto-22-snap-idc5/70133452/) | SNAP-IDC5 | | 2.5-28 VDC | [70134082](http://www.alliedelec.com/opto-22-snap-idc5d/70134082/) | SNAP-IDC5D | | 35-75 VAC/VDC | [70133645](http://www.alliedelec.com/opto-22-snap-idc5g/70133645/) | SNAP-IDC5G | | 15-32 VDC, leakage-tolerant | [70133646](http://www.alliedelec.com/opto-22-snap-idc5-ht/70133646/) | SNAP-IDC5-HT | | 10-32 VDC/VAC, isolated, with manual/auto switch | [70133818](http://www.alliedelec.com/opto-22-snap-idc5ma/70133818/) | SNAP-IDC5MA | | Contact status, normally open | [70134071](http://www.alliedelec.com/opto-22-snap-idc5-sw/70134071/) | SNAP-IDC5-SW | | Contact status, normally closed | [70133755](http://www.alliedelec.com/opto-22-snap-idc5-sw-nc/70133755/) | SNAP-IDC5-SW-NC | #### SNAP Outputs (4 points each) | **Actuator signal required** | **Allied part number** | **Opto 22 part number** | | --- | --- | --- | | 12-250 VAC | [70133453](http://www.alliedelec.com/opto-22-snap-oac5/70133453/) | SNAP-OAC5 | | 12-250 VAC, isolated channels | [70134072](http://www.alliedelec.com/opto-22-snap-oac5-i/70134072/) | SNAP-OAC5-I | | 12-250 VAC, isolated, with manual/auto switch | [70134084](http://www.alliedelec.com/opto-22-snap-oac5ma/70134084/) | SNAP-OAC5MA | | 5-60 VDC, load sourcing | [70133455](http://www.alliedelec.com/opto-22-snap-odc5src/70133455/) | SNAP-ODC5SRC | | 5-60 VDC, load sinking | [70133454](http://www.alliedelec.com/opto-22-snap-odc5snk/70133454/) | SNAP-ODC5SNK | | 5-200 VDC, load sinking | [70133756](http://www.alliedelec.com/opto-22-snap-odc5asnk/70133756/) | SNAP-ODC5ASNK | | 5-60 VDC, isolated, with manual/auto switch | [70134086](http://www.alliedelec.com/opto-22-snap-odc5ma/70134086/) | SNAP-ODC5MA | | 5-60 VDC, isolated channels | [70133652  ](http://www.alliedelec.com/opto-22-snap-odc5-i/70133652/) | SNAP-ODC5-I | | 5-200 VDC, isolated channels | [70134085](http://www.alliedelec.com/opto-22-snap-odc5a-i/70134085/) | SNAP-ODC5A-I | | Mechanical Power Relay, Form C | [70134045](http://www.alliedelec.com/opto-22-snap-omr6-c/70134045/) | SNAP-OMR6-C | | Mechanical Power Relay, Form C, with integrated transient suppression | [70746831](http://www.alliedelec.com/opto-22-snap-omr6t-c/70746831/) | SNAP-OMR6T-C | --- ### G4 Power Supplies—Choose one based on your input voltage (powers rack and Pi): Typical Raspberry Pi rated mini-USB power supplies will work perfectly for powering the Pi and the I/O. However, Opto 22 also offers optional industrial power supplies: | **Input voltage** | **Output current** | **Allied Part #** | **Opto 22 Part #** | | --- | --- | --- | --- | | 120 VAC | 0.5 A | [70133593](http://www.alliedelec.com/opto-22-pbsa/70133593/) | PBSA | | 220 VAC | 0.5 A | [70133986](http://www.alliedelec.com/opto-22-pbsb/70133986/) | PBSB | | 12/24 VDC | 1.5 A | [70133987](http://www.alliedelec.com/opto-22-pbsc/70133987/) | PBSC | **Note on peripherals:** If your Pi uses USB-powered peripherals (like hard drives, displays, or WiFi dongles), you’ll need a power supply that puts out more current than these. With these peripherals: - Connect a 5 V power supply rated 2.5 A to 5 A to the G4 rack power terminals. - Replace the G4 mounting rack’s standard 1 A fuse with a 5 A fuse (shipped with the Carrier Board). Raspberry Pi is a trademark of the Raspberry Pi Foundation. ## Download the Digital I/O for Raspberry Pi Selection Guide ### Get complete specifications: [![Get the selection guide](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/e0052f4e-748f-4393-b6d9-7fc03ba04bd1.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/e0052f4e-748f-4393-b6d9-7fc03ba04bd1) [![Digital I/O for Raspberry Pi Selection Guide - Allied Electronics](https://info.opto22.com/hs-fs/hubfs/pi_selection_gd_292x378.png?width=292&name=pi_selection_gd_292x378.png "Digital I/O for Raspberry Pi Selection Guide - Allied Electronics")](http://www.opto22.com/documents/2209_Allied_Digital_IO_for_Raspberry_Pi_Selection_Guide.pdf) **Get the data sheet with module compatibility and GPIO pinout diagrams** **[![Get the data sheet](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/42f1f72f-4f76-491e-b6ca-c7513a56909e.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/42f1f72f-4f76-491e-b6ca-c7513a56909e)** **Looking for code samples?** **Visit [developer.opto22.com](http://developer.opto22.com/pi/pi-code-samples/)** --- ## Where can you buy your Raspberry Pi, carrier board, and I/O? Contact Allied Electronics today: ![Allied Electronics logo](https://info.opto22.com/hs-fs/hubfs/Allied_Electronics_Logo.jpg?width=100&name=Allied_Electronics_Logo.jpg "Allied Electronics logo") **Allied Electronics** 7151 Jack Newell Blvd. S Ft. 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