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RS485 Network application：
- This means can be adopted when one RS232 mainboard will control more than 32 RS485 subsidy equipment, and the compatible resistance should be added for the prevention on the signal reflection and disturbance 12 , 1/4 watts
Specification:
1) Serial port feature: Concurrently compatible with RS-232C, RS-485 Standard of EIA/TIA
2) Electric interface: DB9 hole interface of RS-232 end, DB9 pin connector of RS-485 end, compatible with post (5 connection)
3) Work methods: asynchronous half duplex
4) Transmission media: common wire, doule wire or UTP or shielding line
