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XSDZ-3DM User Manual - Y3k.com

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<strong>XSDZ</strong>-<strong>3DM</strong> <strong>User</strong> <strong>Manual</strong>5. Appendix5.1 RS485 Bus General KnowledgeAccording to the RS485 Industrial Standards, the RS485 Bus is of half-duplex data transmission cables with a characteristicimpedance of 120. The maximum load capacity is 32 unit loads (including the main controller and the controller equipment).Distance of RS485 bus transmissionUse the 0.56mm (24 AWG) twisted cable as the <strong>com</strong>munication line; the farthest distance it can reach is as follows based on thedifferent Baud rates:Baud RateMaximum Distance2400bps1800m4800bps9600bps19200bps1200m800m600mTo ensure maximum transmitting distance the RS485:• Uses high quality cables• Installs the dome in an environment with a minimum amount of electromagnetic interference• Minimizes the amount of equipment/workload on the RS485 Bus31

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