4-Channel RS485 Repeater Optical Isolation Hub Splitter with Isolated Power Supply for Industrial Data Communication Systems

About this item

• •Specification:
• •Item Type: Repeater
• •Compatibility: Compatible with RS-232, RS-485TIA/EIA standards
• •Working Voltage: DC: 9-24V
• •Rated Power: 0.5-1.2W
• •Input Interface: 1 RS-232/1 RS-485
• •Output Interface: 4 RS-485
• •Load Capacity: 128 nodes per interface
• •Communication Distance: 2500 meters shielded wire or twisted pair wire per interface
• •Communication Rate: 300bps-115.2Kbps
• •Installation Method: 35mm rail installation, 4-hole installation on the back plate
• •Structure Size: Approx. 115 x 90 x 40mm / 4.5 x 3.5 x 1.6in
• •Working Environment: -30℃ to 70℃ relative humidity>95%RH
• •Wiring Notes:
• •1. 485 communication line must use shielded twisted pair, preferably multiple strands for spare, the longest is not more than 2500 meters.
• •2. The wiring should be as far away as possible from high-voltage wires, not parallel to power lines, and not to be bundled together.
• •3. 485 bus must be a hand-in-hand bus structure, and resolutely eliminate star connection and bifurcation connection.
• •4. If there are more than 30 controllers or the cable length is greater than 500 meters, it is recommended to use a 485 repeater.
• •5. The AC-powered equipment and the chassis must be grounded and well grounded.
• •6. Connect the GND ground of all 485 devices with shielded wires.
• •Requirements For Wire Selection Using RS-485 Bus For Communication:
• •Use shielded twisted pair cable
• •Copper, wire diameter 0.5～0.75 square millimeter,
• •Impedance 38～88Ω/km,
• •Capacitive resistance 30～50nF/km,
• •shielded twisted-pair cable with a twisting distance of 20 mm (if the line distance is not more than 500 meters, the line standard can be appropriately reduced, but it must be a twisted pair)

Specifications