Rs485 Port - Cisco IR829 Hardware Installation Manual

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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