Description
Specifications: Recommended Value (Typical) Limit Value Working Voltage 9V~36V DC 9V~36V DC Rated Power 0.36W (9V/35mA; 12V/27mA; 24V/15mA) 0.5W Working Temperature -30?~70? -40?~80? Responsible for Capacity 1~128 node 128 node Communication Distance 0~1200 meters 1200 meters Communication Rate 300~500K bps 500Kbps
Note:
It is suggested to use RS485E equipment under recommended value for long-term stable operation. Equipment will not damage when working under limit value, but may result in performance degradation. Do not exceed the limit value, otherwise it may damage the equipment.
Wiring Note: 1. 485 communication wires must be shielded twisted pair. It is better to have multi-strand for spare, and the total length is not more than 1,200 meters.
2. Wires should be as far as possible away from high-voltage wires, do not parallel with the power cord and cannot be bundled together.
3. 485 bus must be hand-hand bus structure, and must not be star connection and fork connection.
4. 485 repeater must be used when there is more than 30 controllers or wire is longer than 500 meters.
5. AC power supply equipment and case must be grounded well.
6. Connect GND of all 485 devices with shielded cable.
7. Connect 120 ohm terminal resistor in parallel to 485+(A) and 485-(B) of the last 485 device.
RS-485 bus wire should be 2-core shielded twisted pair copper wire, of diameter 0.5 to 0.75 square millimeters, impedance 38 to 88 ohms / km, capacity of 30 to 50 nanofarad / km, twist pitch is 20mm (if wire distance is not more than 500 meters, the standard can be appropriately lower, but must be twisted pair)
Package Includes: 1 x RS-485 Repeater
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