How MAX485 works?
It works at a single +5V power supply and the rated current is 300 μA. Adopting half-duplex communication to implement the function of converting TTL level into RS-485 level, it can achieve a maximum transmission rate of 2.5Mbps.
What is MAX485 IC?
The MAX485 is low-power transceivers for RS-485 and RS422 communication. Each part contains one driver and one receiver. The driver slew rates are not limited, allowing them to transmit up to 2.5Mbps. These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers.
What is rs485 protocol?
RS-485 is used as the physical layer underlying many standard and proprietary automation protocols used to implement industrial control systems, including the most common versions of Modbus and Profibus. DH 485 is a proprietary communications protocol used by Allen-Bradley in their line of industrial control units.
What is rs485 module?
RS-485 provides for robust serial communications over long distances of up to 1200 meters (4000′) or in electrically noisy environments and is commonly used in industrial environments. It supports up to 2.5MBit/Sec data rates, but as distance goes up, the maximum data rate that can be supported comes down.
Is RS485 synchronous or asynchronous?
asynchronous serial communication
The RS232 and RS485 interfaces use asynchronous serial communication. This means that they utilizes start and stop bits in order to know when information is being sent. This is a bit different from the synchronous data communication in which devises must be synchronized at first and then send data continuously.
Is RS485 two wire or 4-wire?
4-wire implementation of RS485 is one of these variations. To gain a more detailed understanding of the difference between 2-wire and 4-wire RS485, a layman’s understanding of the basic concept of this standard may be helpful.