MAX485 RS485 to TTL Converter Module

The MAX485 module makes it easy to bridge TTL-level UART communication with the rugged RS-485 differential signaling standard, opening the door to long-distance, noise-resistant serial communication in industrial and DIY projects alike. Built around the MAX485 low-power, slew-rate-limited transceiver chip, this module converts signals between TTL Tx/Rx pins on one side and RS-485 D+/D- terminals on the other, making integration with Arduino, Raspberry Pi, and other microcontroller platforms straightforward.

RS-485 is particularly valuable for applications spanning long cable runs or electrically noisy environments, supporting communication distances of up to 1200 meters over twisted pair cabling, far beyond what standard TTL or RS-232 links can reliably achieve. The module also supports multi-drop networking, allowing up to 32 transceivers to share the same bus, which makes it well suited for industrial automation, sensor networks, and multi-device serial communication setups.

Automatic direction switching between transmit and receive modes simplifies control since the host microcontroller only needs to toggle a single enable pin, while an onboard 120Ω termination resistor helps maintain signal integrity across longer cable runs. This combination of long-range reliability and simple TTL-side integration makes the MAX485 module a practical choice for hobbyists and engineers building distributed sensor systems, industrial control networks, or any project requiring robust serial communication over distance.

Specification:

• IC Chipset : MAX485
• Operating Voltage : 5V DC
• Communication Standard : RS-485 (EIA-485)
• Interface : TTL (Tx, Rx) to RS-485 (D+, D-)
• Max Nodes on Bus : 32 Transceivers
• Max Communication Distance : Up to 1200m
• Baud Rate Range : 300 – 38400bps (Typical)
• Direction Control : Automatic Tx/Rx Switching
• Line Termination : Onboard 120Ω Resistor