Emerson OpenComms-485 Manual do Utilizador Página 31

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30 NIC Setup and Testing
Maximum of 32 devices
with a total cable length of
4000feet.
Modbus RTU Master
EIA-485 9600,N,8,1
Figure 9. Typical Maximum Installation
The recommended cable characteristics are:
Normal Environments:
18-22 gauge, twisted-pair, stranded
(non- shielded)
Typical type is: Belden 8442
Noisy Environments:
18-22 gauge, twisted-pair, stranded
(shielded)
Typical type is: Belden 9461
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