This RS485 to TTL Converter module is based of MAX485/ SN75HVD08D Both chip is sutable for this schmetic, which is one of the most relied on when working with RS485 Bus. This module supports 3.3 V and 5 V power supplies, and TTL Levels. It can connect and identify up to 128 nodes on the RS485 bus. This module also supports very long range of the bus.

This RS485 to TTL Converter Module can support up to 800 meter of bus length. It has connections for RX,TX, +ve and GND, on one side, and other side has connection for RS485 bus. It also has the Indicators for the Receive and Transmit Signals.

Link:  https://sharvielectronics.com/product/rs485-to-ttl-converter-module-serial-port-uart-hardware-automatic-flow-control-module/