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Description
2-4 Wire 422/485 9 pin Converter - B+B SmartWorxThe 2 4 Wire 422 485 9 pin Converter from B+B SmartWorx is a compact, port powered solution that bridges RS 232 devices to robust RS 422 and RS 485 networks. Designed for reliability in industrial environments, this converter transforms TD (transmit) and RD (receive) signals from RS 232 into the differential RS 422 RS 485 formats, enabling longer cable runs, multi drop networks, and improved noise immunity. With Automatic Send Data Control (SDC) built
The 2-4 Wire 422/485 9 pin Converter from B+B SmartWorx is a compact, port-powered solution that bridges RS-232 devices to robust RS-422 and RS-485 networks. Designed for reliability in industrial environments, this converter transforms TD (transmit) and RD (receive) signals from RS-232 into the differential RS-422/RS-485 formats, enabling longer cable runs, multi-drop networks, and improved noise immunity. With Automatic Send Data Control (SDC) built in, the unit automatically enables the RS-485 driver whenever data appears on the RS-232 side, removing the need for external control signals and simplifying integration into existing equipment. This makes it an ideal choice for automation, process control, data acquisition, and serial device networks where simplicity and dependability matter most.
- Port-powered RS-232 to RS-422/RS-485 converter that draws power directly from the host serial port, eliminating the need for an external power supply.
- Supports both 2-wire and 4-wire RS-422/RS-485 configurations, enabling flexible topologies such as point-to-point, multidrop, and networked devices across varying distances.
- Automatic Send Data Control (SDC) automatically enables the RS-485 driver when data is present on the RS-232 side, reducing latency and removing manual direction-control requirements.
- 9-pin (DB9) port design and durable construction provide reliable performance in industrial settings while preserving compatibility with standard serial interfaces.
- Simple, plug-and-play operation with no external power dependency and straightforward topology integration for quick deployment in new or existing systems.
Technical Details of 2-4 Wire RS-422/RS-485 Converter (B+B SmartWorx)
- Type: Port-powered RS-232 to RS-422/RS-485 converter supporting 2-wire and 4-wire configurations
- Connector: 9-pin DB9 port on the RS-232 side for host interface; RS-422/RS-485 network connections suitable for differential signaling
- Power: Draws operating power from the RS-232 port (no external supply required)
- Direction control: Automatic Send Data Control (SDC) automates RS-485 driver enable/disable based on RS-232 activity
- Data compatibility: Converts TD and RD lines from RS-232 to differential RS-422/RS-485 signals for reliable long-distance communication
- Environment: Designed for durability in standard industrial environments and compatible with typical serial devices and controllers
- Brand and model lineage: B+B SmartWorx line of serial interface devices known for robust industrial communications
how to install 2-4 Wire 422/485 9 pin Converter
- Power is supplied by the host RS-232 port, so connect the converter to the DS carte or computer’s serial port using a standard RS-232 cable to the DB9 connector.
- Connect the RS-422/RS-485 network lines to the corresponding terminals or connectors provided on the converter according to your topology (2-wire or 4-wire as required by your device network).
- Ensure the RS-232 device is configured for the desired baud rate, data bits, parity, and stop bits that match the RS-422/RS-485 network requirements, since the converter passes through the RS-232 framing to the differential side.
- Power the host device and verify the link status. The Automatic Send Data Control will enable the RS-485 driver automatically when data is transmitted from the RS-232 side.
- Test the communication with a loopback or an end-to-end data transfer test to confirm successful data exchange across the RS-422/RS-485 network. If issues arise, check cabling, termination resistors, and network topology for compatibility.
Frequently asked questions
- What is the purpose of this converter? It bridges RS-232 devices to RS-422/RS-485 networks, enabling longer distance communication with improved noise immunity and the ability to support multi-drop networks.
- Do I need an external power supply? No. The unit is port-powered and draws its operating power directly from the RS-232 port.
- What is Automatic Send Data Control (SDC)? SDC is a feature that automatically enables the RS-485 driver when data appears on the RS-232 side, simplifying integration and eliminating manual driver control.
- Can I use 2-wire and 4-wire configurations? Yes. The converter supports both 2-wire and 4-wire RS-422/RS-485 configurations, providing flexibility for different network topologies.
- Is this compatible with standard Windows or Linux systems? Devices in the B+B SmartWorx family are designed for broad compatibility with common operating systems and serial interfaces. For specific driver requirements or compatibility, consult your host system documentation and the product manual.
- What kind of networks can I connect? You can connect point-to-point links or multidrop RS-422/RS-485 networks, depending on your topography and termination strategy. Ensure proper biasing and termination for reliable operation.
- What baud rates are supported? The converter operates at standard RS-232 baud rates and passes those rates to the RS-422/RS-485 side. Match the host and network settings to ensure reliable communication.
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
4.2 ★★★★★
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Product Reviews
★★★★★ 5
Great quality and easy to apply
Model: iPad A16 11th/10th/Air 11
I love these screen protectors. They feel amazing and they sent an installation kit making the applying process so easy. There was also a squeegee included to make sure air bubbles wouldn’t
Be a problem. I’ve had zero problems with the protector reducing the touch sensitivity of the screen, the protectors fit well, seem durable, and are great quality. The price was also reasonable. I’ve never owned other paper-feel screen protectors so I’m not able to give a comparison, but for these being my first ones I am very pleased.
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Get this if you draw, write, play touch games
Model: iPad Pro 11,iPad Air 5th/4th
The quality of the screen protector is great, easy to put on without the video. i love how it really feels like writing on paper with my pen especially drawing. I will definitely be buying more for myself,mother and siblings. It’s a good fit for my iPad Air 4th gen and a bang for the buck
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 4
Good but Installation was a Bit Iffy
Model: iPad A16 11th/10th/Air 11
90% of the time I use my iPad for school. Originally, I used just a regular screen protector, but it would get dirty with smudges and imprints from my Apple Pencil, and there would be a lot of glare since I'm in a classroom most of the time, which would make it awkward to see what I was writing at times. Plus, the screen protector was too smooth so it would actually be difficult to write legibly.
This product makes it a lot easier to write smoother on the iPad. I only just installed it, so I can't say much on the smear protection yet, but I can already see the reduction in glare as well. For $8, getting a pack of two of these with an install kit is a very nice deal imo.
My only issue was the installation process, which could've been as much my own fault tbh, but I felt like I aligned the screen protector pretty well with the sticker, however the first time I tried installing it it was way off the center (maybe my case got in the way?). The biggest issue was using the squeegee to pop air bubbles, and this is something they don't mention in neither their instruction guide nor video, but you're supposed to used the velvet red side, not the naked white side: using the white side actually takes the grit off the protector, which is obviously something you don't want on a product that relies on it. Thankfully I have another one in reserve in case this one wears off sooner than expected.
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Reviewed in the United States on October 7, 2025
★★★★★ 5
Perfect Paperlike substitute
Model: iPad Air/Pro 13
I’ve been using this screen for roughly two months now and I can say it was so worth it, it is rough on plastic nibs! I am going to order some heavier duty ones and see how it fairs! It works just fine ON TOP of a screen protector isn’t that great!
I wanted something like paper like but didn’t want to pay that expensive price for something I wasn’t sure I was going to like. This one does the trick and gives me just enough resistance to feel more in control of my pen!
It fits well just make sure to know the size if your screen I had to modify where the camera indent was but it cut just fine and looks great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
Wow! So cheap and really high quality!
Model: iPad Air/Pro 13
Very nice texture, affordable, durable, easy to mount. No longer get tons of grease marks from my hands, the glare is reduced, it fits the screen perfectly, there’s no tint to the color so it doesn’t distort the image. Great product for a great price.
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Reviewed in the United States on April 13, 2026
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