Amazon.com: DORHEA 12Pcs MAX485 RS485 Transceiver Module TTL UART Serial to RS485 Instrument Interface Module Max458 Chip RS-485 Communication Transceiver 5V SCM Development Accessories Board for Raspberry Pi : Electronics
Max31856|max485 Rs485 Module 5pcs - Ttl To Rs485 Converter For Mcu Development
MAX485 RS485 transceiver module
MAX485 RS-485 Module TTL to RS485 Converter Module for Arduino Raspberry Pi - Newegg.com
RS-485 IC inputs need pull-ups? - Interface forum - Interface - TI E2E support forums