RS232 to RS422 RS485 Converter 5KV Isolation Features and Benefit High Speed Baud Rate up to 921.6Kbps Built-in Terminator 120 ohm for DIP Switch Setting Max 10 Device connectivity for 4 Wire RS-485(RS-422 Multi-Drop) Mode Max 32 Device Connectivity for RS-485 Mode Communication status can be monitored through LED 5KV Optical Isolation Protection 600W Surge Protection Built-in 15KV ESD protection for all Serial Port and RS-422/485 Signals Protection Supports Industrial Specification No Driver Needs