Adopting original SP3485, it realises the interconversion of TTL and RS485 signals, no need for ‘receive - send' control, using this module is as simple as operating your serial port.
5.0mm screw-type terminal wiring, the use of the TTL end of the need to access the power supply.
The circuit only adopts 5V power supply, the output signal level of TTL signal terminal is 5V (the same as the power supply voltage), the input signal level is 5V (compatible with 3.3V signal input).
With independent power supply isolation and signal isolation circuits
The TTL terminal is equipped with over-current protection and surge protection. It can ensure stable output of current and voltage, and strong anti-shock ability.
RS485 terminal with overcurrent protection, surge protection, lightning gas discharge protection circuitry
On-board 120R termination resistor selector toggle switch, which can increase the stability of signal transmission.
Baud rate support range: up to 2Mbps
On-board three LED indicators, used to indicate the circuit signal transceiver status
PWR light: red, power indicator
TXD light: green, TTL data transmission indicator, data flow: RS485->TTL
RXD lamp: blue, TTL data receiving indicator, data flow: TTL->RS485
DIN-rail ABS environmentally friendly housing, compact size, easy to install, cost-effective beauty