This module interfaces an Arduino or similar microcomputer to RS-485. RS485 is used for Serial Communications over longer distances than direct RS232 or TTL, and supports multiple units on the same bus (Multi-Drop).

Specification:

• On-board MAX485 chip, is a tool for RS-485 communications, low-power, Slew-Rate Transceiver
• onboard then 5.08 (mm) pitch 2P terminal for easy wiring RS-485 communication
• the chip has drawn all of the pins can be controlled by the microcontroller operation
• Working voltage: 5V
• board size: 44 (mm) x14 (mm)