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Judgement: RS232 standard than the standard RS485 data transmission over longer distances.

pzlqiaoran2010-04-19 07:12:00 +0000 #1
This statement is right or wrong
hdsr1782010-04-19 07:22:36 +0000 #2
that backwards! RS485 transmission distance than RS232!
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Universal

of the fieldbus cable series impedance of 120Ω twisted-pair shielded cable is widely used in RS485/422, CANBUS other bus, the Many series of cable specifications, please provide the laying of the cable environment, communication rate, the maximum unrepeated transmission distance and other parameters, we will be in accordance with specific conditions recommended by the most appropriate product. General recommendations are as follows:

ordinary twisted-pair shielded cable STP-120Ω (for RS485 & CAN) one pair 20 AWG, 7.7mm cable diameter is about. For indoor, plumbing and general industrial environments. Use, the shield grounded at one end!

Ordinary twisted-pair shielded cable STP-120Ω (for RS485 & CAN) one pair 18 AWG, cable diameter is about 8.2mm. For indoor, plumbing and general industrial environments. Use, the shield grounded at one end!

Twisted-pair shielded armored cable ASTP-120Ω (for RS485 & CAN) one pair 18 AWG, cable diameter is about 12.3mm. Can be used for serious interference, as well as rodents often lightning, explosion-proof requirements of the place. When used, the proposed armored ground at both ends, one end of the innermost shield grounding!

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