RIM-Protocol Converter User Guide - Version 1.0
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2.3.3 EIA-232 COM Connection
The EIA-232 port can be connected to a PC for IP configuration, firmware downloads, and
troubleshooting.
NOTE: The EIA-232 is typically only used as a temporary connection.
Connect the straight through, 9-pin, serial cable as shown.
Figure 2.5 EIA-232 COM Connection
2.3.4 Modbus EIA-485 Connections
The Protocol Converter can function as a Modbus Slave or Modbus Master over an EIA-485
hardware connection. The Dual Port Protocol Converter contains three EIA-485 ports, and
EIA-485 Port 2 can be configured as either a 2-wire or 4-wire connection by wiring the port
appropriately and turning on the Duplex DIP switch. See Table 1.2 and Table 1.3 on page 14
for information about configuring this port.
EIA-485 Ports on the Dual Port Protocol Converter
Figure 2.6 EIA-485 Connection
Port 3
Port 2
Port 1
