UNO R3 RS485 Shield
RS-485 expansion shield with auto-direction control, dual half-duplex channels and plantower sensor interface.
- Material
- PCB & electronic components
- Age range
- 8+
- Category
- STEM Robotics & Electronics
- Customisation
- OEM & ODM available
Specifications, component counts and packaging are configurable. Figures shown reflect our standard configuration.
Key features
- MS2548 auto-direction half-duplex RS-485 transceiver; pins brought out as G/V/A/B via PH2.0-4P or KF301-4P terminals.
- Supports two half-duplex channels with a built-in 120 Ω termination resistor switched by an on-board switch.
- Rear MX1.25-6P port supports Plantower digital universal particle-dust sensors.
- 6 four-pin ports (8_9 / 10_11 / 12_13 / I2C x3) and 12 three-pin ports (8/9/10/11/12/13/A0-A3/2/3); side reset button and power LED.
Frequently asked about this product
Which mainboards does the UNO R3 RS485 Shield stack onto?
The UNO R3 RS485 Shield follows the standard shield pinout, so it stacks directly onto Arduino UNO R3 and compatible boards (including our own UNO-compatible controllers) and lines up with the same footprint on larger Mega-class boards. All I/O is level-tolerant across 3.3 V and 5 V systems.
What voltage does the UNO R3 RS485 Shield run on?
The UNO R3 RS485 Shield runs from a standard 3.3-5 V DC supply (USB or the controller’s 5 V rail). It draws only a few milliamps in normal operation, so it is safe to power from the controller board itself for classroom builds.
What projects is the UNO R3 RS485 Shield good for?
The UNO R3 RS485 Shield is built for STEM and robotics education: classroom demonstrations, science-fair projects, robotics club builds and competition robots. It pairs with the rest of our module range — same connectors, same voltage, same toolchain — so students move from first circuit to competition robot without changing platforms.
What certification do the robotics and electronics products carry?
Controller boards, sensors and modules ship with CE marking and RoHS-compliant components, and the range is designed for classroom use under teacher supervision. Product-specific test reports and declarations of conformity are available for distributors on request.
What is the minimum order quantity, and can I get a sample first?
These are standard catalogue lines with stable production, so minimums are low and lead times are short. Samples ship within about a week and are normally credited against a first order. Mixed-SKU cartons are accepted for evaluation orders.
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Need pricing on this line?
Send your target quantity, destination market and any changes you need to artwork, colourway or packaging. We reply with a quotation and the applicable compliance route — usually within one working day.