- Then, 2P terminal with 5.08 (mm) pitch, convenient RS-485 communication wiring. This MAX485 to TTL module simplifies the use with the UART of the microcontroller to create bidirectional RS485 networks. Integrated MAX485 chip, low power consumption. SPECIFICATION · All pins can be controlled by the microcontroller · Integrated 120R terminating resistor · Indication of the power indicator · 2.54 mm pitch interface. · Working voltage: 5V · Plate size: 44 (mm) x14 (mm)