Rs485 Port - Cisco IR829 Hardware Installation Manual
Industrial integrated services router
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Product Overview
RJ45 Ports
RS485 Port
The RS485 pin out follows EIA-561 standard. There is no standard for RJ-45 connector used for RS485. In the IR809, the pin-pairs 1,2 and
3,6 were chosen for RS485 so that an Ethernet CAT-5 with these standard twisted-pair pin assignments can be used.
Figure
Figure 10
shows the characteristics of the S0 and S1 ports.
Figure 10
S0 and S1 Characteristics
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