Specification:
Standards: EIA RS-232C, RS-485, RS422 standard
RS-232 signal: TX, RX, GND
RS-422 signal: T+, T-, R+, R-, GND
RS-485 signal: D+, D-, GND
Working mode: Asynchronism, point to point or multi point, 2 wire half-duplex,4 wire full duplex
Baud rate: 300~115200bps, auto test serial signal rate detect signal speed automatically, zero delay time
Flow control: Data direction auto-turnaround, no flow control is required
Transfer distance: RS-485/422 side:1.8Km,115200bps
RS-232 side: no less than 5m
Max number of drops: 128 nodes
Optical isolation: 2500V
Port protect: 1500W surge protection,15KV ESD protection
Power
Power input: 9VDC power input
Consumption: Static less than 120mA, dynamic less than 350mA
Environment
Operating temperature: -40°C to 85°C 
Storage temperature: -40°C to 85°C
Humidity: 5% to 95%(no condensation)
Appearance
Dimensions: 93.0mm×62.4mm×22.0mm 
Material: Iron(shell)  
Color: White   
Weight: 200g
Warranty: 5 years
Approvals: FCC, CE, RoHS approvals