RS-232/RS-485 Passive ConverterDetailed product description：

The MWE485-A RS-232/RS-485 passive converter realizes passive conversion between RS-232 and RS-485, supports remote communication (over 1.5Km) and multi machine communication (128 nodes), half duplex, serial port power theft, and does not require external power supply.
RS-232/RS-485 conversion, RS485 two-wire half duplex communication
Efficiency up to 95%, serial port power theft technology, no need for external power supply

MWE485-A type RS-232/RS-485 passive converter with integrated industrial wiring terminals, standard DB9-hole serial port
Unique serial port protection circuit, capable of hot plugging and unplugging
Built in intelligent module, automatically identifies the direction of RS-485 signal flow, without the need for CTS flow control
Built in 600W/ms lightning protection and 15KV anti-static protection
Transparent transmission, adaptive baud rate, no need to change user protocol
Industrial grade design, preferred imported components, all surface mount technology