![Actisense PRO NMEA 0183 Buffer - 2 OPTO Inputs, 12 ISO-Drive Outputs, Serial Port, Ethernet Port, Pluggable Screw Terminal [PRO-BUF-2]](https://cdn.shopify.com/s/files/1/0855/3916/0358/files/99820XL.jpg?v=1766097527)
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Description
Actisense PRO NMEA 0183 Buffer - 2 OPTO Inputs, 12 ISO-Drive Outputs, Serial Port, Ethernet Port, Pluggable Screw Terminal [PRO-BUF-2]PRO NMEA 0183 Buffer 2 OPTO Inputs, 12 ISO Drive Outputs, Serial Port, Ethernet Port, Pluggable Screw Terminal Two OPTO isolated inputs and twelve ISO Drive isolated outputs. Offering device protection and excellent flexibility, all in one product the Actisense PRO BUF 2, the intelligent, type approved PRO range buffer. The PRO BUF 2 is rugged, with a stainless steel housing, and provides isolation on all inputs and outputs. With two NMEA 0183 inputs,
PRO NMEA 0183 Buffer - 2 OPTO Inputs, 12 ISO-Drive Outputs, Serial Port, Ethernet Port, Pluggable Screw Terminal
Two OPTO-isolated inputs and twelve ISO-Drive™ isolated outputs. Offering device protection and excellent flexibility, all in one product - the Actisense® PRO-BUF-2, the intelligent, type-approved PRO range buffer.
The PRO-BUF-2 is rugged, with a stainless steel housing, and provides isolation on all inputs and outputs. With two NMEA 0183 inputs, twelve NMEA 0183 outputs, a bi-directional serial port, and an Ethernet port, the PRO-BUF-2 is a perfect solution for larger leisure vessels, commercial shipping, and is a great addition for systems that require type-approved devices.
The PRO-BUF-2 is designed to suit the majority of NMEA 0183 systems and is ready to go ‘out of the box’ by simply hard-wiring the two-mode inputs as required.
The Intelligent NMEA 0183 Buffer's manually configurable basic modes of operation include variations of buffer modes, intelligent auto-switch, and combine modes.
For all other configurations, leaving the mode inputs floating selects the ‘User Configuration Mode’. The web-based configuration tool allows full customisation of the PRO-BUF-2, and is compatible across all popular Operating Systems. Using the web-based configuration tool allows for fine-tuning of the data available on each output.
To make installation quick and simple, the PRO-BUF-2 features 2-part pluggable connectors that allow the use of screw terminals*, and a professional DIN Rail mounting system (DIN Rail not included). The device can also be mounted directly to the bulkhead.
Helpful LEDs indicate power, data in, data out, and the alarm status to aid diagnostics.
Data statistics and load indication via the web tool provide a real-time view of data.
Features:
- 2 Opto-Isolated inputs
- 12 ISO-Drive NMEA 0183 outputs
- Ethernet Port
- Flexible operating modes
- Automatic Baud Rate matching on inputs
- Alarm output options
- Web-based configuration tool
- Diagnostic LEDs
- Advanced Data Filtering and Routing
- 2 virtual Autoswitch modules
- Data statistics and load indication via a web tool
- Designed for a 12 / 24 Volt supply
- Future-proofing with easily upgradable firmware
- 2-part pluggable connector system
- Stainless Steel Housing with DIN rail mount option
- Type Approved
- Flexible configuration options to buffer autoswitch or combine NMEA data
- ISO-Drive separates the Listener from the Talker to protect both the PRO-BUF and each connected device.
- Fast bi-directional data connection to a monitor and control software application
- PRO-BUF can be configured using any web browser on any Operating system
- Works out-of-the-box without configuration for basic installations, or can be easily user-configured as required
- Relay output is compatible with on-board alarm systems, and the NMEA Alarm sentence can be displayed and actioned on an MFD
- Easy to access via network, doesn’t require the device to be moved or have a serial connection to the PC.
- A quick visual check gives the user confidence that each input and output is passing data
- Features can be utilised to fine-tune data, avoiding data overloads on the outputs and connected listeners
- Allows automatic data priority selection between two devices of the same type of data (e.g., GPS)
- Shows the NMEA 0183 on each I/O Port, and how frequently it arrives, great for low-level diagnostics
- Allows use on large vessel 24V DC power supply systems
- Additional features in future firmware revisions are accessed using a simple update process via Actisense Toolkit over Ethernet
- Fast installations and supports both screw and screwless terminal types. Ideal for quick diagnostic swapping
- Increased durability, ease of installation, and high performance
- Can be installed on vessels governed by Class Society Rules
- Type Approved (RINA)
Technical Specifications:
Power Supply
- Input Supply Voltage - 9 to 35 V DC
- Input Supply Current - 325mA max @ 12V DC (all outputs @ full drive into 100 ohm loads)
- Input Protection - Continuous reverse polarity, transient overvoltage, and ESD protection
- Power Indicator - LED, Blue – indicates unit is functioning correctly
- Input Supply Connector - Pluggable 2-way screw terminal, 5.08mm pitch
NMEA 0183 Port – Listener & Talker
- Number of Listener / Input Ports - 2 isolated NMEA 0183 Listeners
- Number of Talker / Output Ports - 12 isolated NMEA 0183 Talkers
- Compatibility - Fully NMEA 0183, RS422 & RS232 compatible. RS-485 Listener compatible
- Speed/baud rate - 4800 to 38400 bps
- Talker Output Voltage Drive - >= 2.2V (differential) into 100 ohm
- Talker Output Current Drive - 20 mA maximum per output
- Talker Output Protection - Short circuit and ESD
- Talker Data Indicator - LED, Orange (Flashes at data rate)
- Listener Input Voltage Tolerance - -15 V to +15 V continuous, -35 V to +35 V short term (< 1 second)
- Listener Input Protection - Current limited, overdrive protection to 40 VDC, and ESD protection
- Listener Data Indicator - LED, Green (Flashes to indicate valid input)
- Connectors - Pluggable 2/3-way screw terminals, 5.08mm pitch
Serial Port
- Compatibility - RS422 & RS232 compatible. RS-485 Listener compatible
- Speed/baud rate - 4800 to 115200 bps
- Output Voltage Drive - >= 2.1V (differential) into 100 ohms
- Output Current Drive - 20 mA max.
- Output Protection - Short circuit and ESD
- Input Voltage Tolerance - -15 V to +15 V continuous, -35 V to +35 V short term (< 1 second)
- Input Protection - Current limited, overdrive protection to 40 VDC, and ESD protection
- Data Indicators - LED’s: Green = Receive, Orange = Transmit
- Connectors - Pluggable 3-way screw terminals, 5.08mm pitch
Ethernet Port
- Host Interface - 10/100BaseT, automatic polarity detection
- Supported Protocols - TCP/IP for configuration and firmware updating, TCP/IP and UDP for NMEA 0183 comms
- Indicators - Green = Link/Activity, Yellow = 100 Mbps
- Connector - RJ45
Isolation
- NMEA 0183 Listener - OPTO-Isolated, Hi-Pot tested to 1000V
- NMEA 0183 Talker - Uses IsoDriveTM, Hi-Pot tested to 1000V
- Serial Port - Uses IsoDriveTM, Hi-Pot tested to 1000V
- Alarm Relay - Hi-Pot tested to 1000V
- Ethernet Port - 2kV for 60s
Mode Inputs
- Input Voltage Range - 0 to 35V DC
- Protection - Transient overvoltage and ESD protection
- Connectors - Pluggable 2-way screw terminals, 5.08mm pitch
Alarm Output
- Contacts - Common, Normally Open and Normally Closed
- Alarm Indicator - LED, Red indicates a valid alarm condition
- Contact Ratings - 35VAC / 50VDC
- Connectors - Pluggable 3-way screw terminals, 5.08mm pitch
Mechanical
- Housing Material - 316 Stainless Steel
- Dimensions - 210mm (W) x 128mm (H) x 27mm (D)
- Weight - 530g
- Mounting - Bulkhead mount or DIN rail mount (DIN kit 1)
Approvals and Certifications
- EMC - IEC 60945:2002-08, DNVGL-CG-0339:2019 & IACS UR E10 Rev7
- Compass Safe Distance - 750mm
- Type Approval Certificate - RINA
- Operating Temperature - -25 to +70°C
- Storage Temperature - -40 to +85°C
- Relative Humidity (RH) - 95% @ 55°C
- Environmental Protection - IP40
- Guarantee - 5 Years
Specifications:
- Data Interface: NMEA 0183
- Box Dimensions: 2"H x 6"W x 10"L WT: 1.5 lbs
- UPC: 5060998710522
Quick Guide (pdf)
Owner's Manual (pdf)
Brochure (pdf)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 2312 reviews
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Product Reviews
★★★★★ 3
Works
Color: Light Gray
Heavy! It is a nice case and the keyboard works good. Turns off randomly, but not too annoying. This case is heavy though! It at least triples the weight of my iPad, which is opposite the reason I got an iPad Air. Too late to return, I just take the keyboard out, but it must be the magnets in the case that are so heavy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026
★★★★★ 5
Fantastic keyboard!
Color: Navy Blue, Color: Navy Blue
Pleasantly surprised!! And less than half the price of an ipad folio keyboard - I know, one feels like one has to stay in brand. So I was nervous about buying a keyboard that wasn't made by Apple. But to be honest, the Apple keyboards and mice have betrayed me on numerous occasions. They have not earned my loyalty and need to reassess their dubious life choices.
I needed a protective cover to stop my cats doom scrolling while I am asleep. I am OK with them using the internet - even though I have had random people text me back a picture of a large feline left nostril and just the letters WFT? It is what it is. I think they are little geniuses. But they scratch the ipad surface which is annoying. So I thought, what the heck - I am about to do my RN-BSN online and need a way to make my ipad transportable while protected, and set up so I can easily bang out some homework assignments on the run.
Easy set up! What a relief! Tech usually hates me - sees me coming from a mile off and starts planning to at best ruin my day, and at worst have me calling my therapist. At first I started reading the instructions and my teeth hurt from the bad translation into English. But even with that negative energy I was able to set it up very quickly. Everything just WORKED!! I know. I set a low bar. These days one has to. This time I didn't need to.
The cover is sturdy, soft and coffee resistant, thank goodness. The keyboard just plops on, connects through magic and immediately makes me feel like I am not as stupid as I thought! Absolutely recommend this wonderful keyboard - I dunno who do this voodoo but I am very excited. Crack on my lovelies! Make those dreams a reality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
★★★★★ 5
Great product!
Color: Light Pink, Color: Light Pink
I really love this. The baby pink is so cute! I had my hesitations because I couldn’t see if the pink would be as good in real life. It’s like a soft blush color. Honestly, I was going to drop $350 on the Magic Keyboard for my iPad Air. Which is ridiculously expensive. This is a way better alternative. It fits my iPad pen. The iPad itself fits perfectly. I thought the keyboard was going to be tacky and cheap. But it’s pretty legit too. I love that when I’m done using the iPad, the whole case protects everything, even the keyboard inside and especially the camera lense. The magic key board does not have that feature. Like that it’s magnetic too. The material is so soft to touch. I can see how it can get dirty with ink spot if not careful. Overall, really happy with this purchase!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
★★★★★ 5
Sleek, Functional, and Feels Like a Laptop Replacement
Color: Navy Blue
I’m really impressed with this keyboard case. The magnetic attachment is strong and secure, and the keyboard connects quickly without any issues. The trackpad is smooth and responsive, which makes using the iPad feel almost like a laptop. The backlit keys are a great touch, especially with the different color options, and the lighting is even and easy on the eyes.
The case itself feels well made and protective, and I like that it’s stain resistant because it stays looking clean. The navy blue color looks sleek and professional. It fits my iPad perfectly and doesn’t add unnecessary bulk. Battery life has also been solid so far.
Overall, this is a great value for the quality and features you get. Highly recommend if you want a reliable keyboard case that’s both functional and stylish.
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Reviewed in the United States on February 10, 2026
★★★★★ 4
Fairly Priced and Fairly Nice iPad Pro Case
Color: Light Pink
I was on the hunt for a case for my iPad Pro (6th generation), and let me tell you, it was a wild ride! I scoured every review I could find, but it was like trying to find a needle in a haystack. The ones that were reasonably priced had all sorts of issues, and the ones that looked fancy were way too expensive and had just as many problems.
Now, I know what you might be thinking: “You get what you pay for, right?” Well, I was determined to find a case that fit my budget and didn’t have too many complaints. After hours of searching, I finally stumbled upon a case that seemed to be a reasonable match.
Here’s why I picked this one: It has most of the features I wanted. It covers the lens on the back of the iPad, and there’s a holder on top for the pencil allowing it to charge. I’ve gone through two cases before, and they all started to wear out pretty quickly. I didn’t want to spend a fortune on another case that would just fall apart so I found this one to be reasonably priced. The case itself is nice and sturdy, and it’s a great fit for my iPad.
I charged the keyboard for the recommended 5 hours before I first used it, and I haven’t had a chance to test the battery life yet. But after charging, it was a breeze to connect it to my iPad.
A little heads up: the connect button is actually the “C” on the keyboard, not the command or control key. I know, I know, confusing! But once you press the keys, Bluetooth turns on, and connection to the iPad went without any issues.
I’ve seen some reviews mentioning that special characters weren’t working or that the keyboard would just stop working randomly. But so far, everything seems to be working perfectly. I’ll definitely update this review if anything changes.
One thing I really like about this keyboard case is that once it’s connected, you don’t have to reconnect it again. That’s a huge plus! Another cool feature is that the instructions for pairing and using the keyboard are right on the bottom of the keyboard, which is super handy.
Pros:
- style and fit.
- different angles for propping iPad while typing or watching videos
- instructions for pairing and use on the bottom of the keyboard,
Cons:
- The only downside I’ve found so far is that you can’t swivel the iPad from landscape to portrait because the case doesn’t allow for that movement. For me this is a minor inconvenience, because I just close the case and turn it to portrait. If that’s important to you, then this might not be the case for you. Another thing I have noticed is that sometime while I am typing, and I type fast, I will hit something and get dragged somewhere else on the screen. I think this is a user inspired issue, but it is not that big a deal for me.
Overall, this is a good functional case with a pretty good keyboard and iPad protection. I’m giving it 4 stars explained below.
My Stars Explained
5 - Like finding money in your old coat pocket - pure joy!
4 - Almost perfect - like a pizza with just one missing topping.
3 - Like a movie that’s just okay—neither a blockbuster nor a total flop
2 - Like a blind date that went horribly wrong - cringeworthy.
1 - Like stepping on a Lego in the dark - painful.
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Reviewed in the United States on October 22, 2025
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