| Price | $2 |
|---|---|
| Category | Communication Modules |
| Availability | In stock |
| Delivery | Shipped across Lebanon, or collect from the lab |
A MAX485 breakout that converts a microcontroller's 5V TTL serial into RS-485 - the differential two-wire bus industrial gear uses because it survives long cable runs and electrical noise that would wreck plain serial. Four pins face the microcontroller (RO, RE, DE, DI) and a green screw terminal takes the A and B wires. Half duplex, so a spare GPIO flips it between talking and listening. What you put between an Arduino and a Modbus meter or a long sensor run.
Key features
- MAX485CSA transceiver, 5V supply
- Screw terminal for the A / B differential pair
- Half duplex - one pin flips between send and receive
- RS-485 buses run to about 1200 m with at least 32 nodes
- Shrugs off noise that would break plain TTL serial
- For Modbus RTU meters, drives and long sensor runs
Details
Specifications
| Chipset | MAX485CSA (marking read from the board) |
|---|---|
| Conversion | 5V TTL UART to RS-485 (TIA/EIA-485) |
| Operating voltage | 5V |
| Mode | Half duplex, 2-wire (A / B) |
| Pins | RO, RE, DE, DI, VCC, GND on a 0.1 inch header |
| Bus connector | 2-way screw terminal (A, B) |
| Bus length | up to ~1200 m at low data rates (RS-485 standard) |
| Nodes | at least 32 unit loads on a bus (RS-485 standard) |
| Termination | 120 ohm at each end of a long run |
