Feature:1. The hub can prevent bus failure and damage caused by the voltage difference between the power supplies at both ends of the master and slave.2. This RS485 hub can be optoelectronic isolated, automatically sensed, stable performance, and highspeed transmission.3. Safety protection, signal port with reverse connection, shortcircuit alarm indication and can automatically isolate faulty channels.4. The internal processor chip can automatically identify and control the data direction without external intervention.5. Using industrial-grade quality, the core chips are all imported with original packaging, which is stable and durable.Specification:Item Type: RS485 HubMaterial: ABSModel: YN5204Working Power Requirements: Voltage in the Range of DC9-24v, Current Greater Than 0.75aSpecificationsInterface Characteristics: Compatible with EIA/TIA RS232, RS485 StandardsElectrical Interface:RS-485: Plug TerminalRS-232: Db9 Serial Port FemaleInterface ProtectionRS485: 600w Thunder Surge ProtectionRS-232: 15kv ESD ProtectionTransmission Medium: Twisted Pair or Shielded Twisted PairNumber of Nodes: Max128Terminal Resistance: Four Slave Ports Built-in 120 Ohm Terminal ResistanceTransmission Rate: 1200bps to 115.2kbpsIsolation Voltage: 1000vdcPower Consumption: 1.5w at DC 10~30vMaximum Transmission Distance: 1200m(4000ft) at 19.2kbpsStatus Indication: Real-time Display of the On-board Transceiver IndicatorWorking Temperature: -30~+75Storage Temperature: -40~+85Working Humidity: 25%~95% (non-condensing)Storage Humidity: 0%~95% (non-condensing).Package List:1 xRS485 HubNote:Please use within the working voltage range of the parameter