MAX485 TTL to RS485 Converter Module For Arduino

MAX485 TTL to RS485 (supporting EIA-485 standard) is for long range, high data rate error prone differential communication. Digital communications networks implementing the EIA-485 standard can be used effectively over long distances and in electrically noisy environments. Multiple receivers may be connected to such a network in a linear, multi-drop configuration. These characteristics make such networks useful in industrial environments and similar applications.

Specifications:

• Features MAX485 chipset
• Working Voltage: 5V
• 5.08mm (0.2″) pitch, 2-pin terminals for RS-485 easy communication and wiring
• 4-pin 2.54mm (0.1″) pitch headers for RS485 and Power
• 4-pin 2.54mm (0.1″) pitch headers for DI,DE,RE,RD signals
• PCB Board Size: 44 x 14mm

Applications MAX485 TTL to RS485

• Multi-drop wired communication System, requiring multiple nodes needing to talk to each other.
• Long distance error prone wired communication
• High data rate wired communication

MAX485 IC.
This IC will take RS232 signals and perform the voltage level conversions required to turn them into 485 signals.

Pin-out:

1. RO – Receiver out
2. RE – Receiver enable (enabled when this pin is LOW)
3. DE – Driver enable (enabled when this pin is HIGH)
4. DI – Driver in (the transmitter pin)
5. GND – Ground (0V)
6. A – Connect to pin A of the other 485 IC
7. B – Connect to pin B of the other 485 IC
8. Vcc – Power, in my case +5V

 

Documents

• Datasheet: MAX485 Chip datasheet.

 

How to use with Arduino:

• Rs485 Serial Communication Between Arduino Mega and Arduino Pro Mini

How-To Information Link HERE: