Omega i-SERIES - Table 3.3 RS-485 Half Duplex Hook-Up

Table 3.3 shows RS-485 half-duplex hookup using a computer’s RS-232 interface, an
RS-485 interface converter, and an i-Series controller.
Table 3.3 RS-485 Half-Duplex Hook-up
COMPUTER CONVERTER BOX i-SERIES
FUNCTION/
PIN FUNCTION DB9 DB25 COMPUTER i-Series LABEL
SIDE SIDE
Rx/Tx 2 3 SEE CONVERTER’S -Rx/-Tx Tx
Rx/Tx 3 2 MANUFACTURING +Rx/+Tx Rx
Common ground 5 7 SPECIFICATION COM RTN
Communication Interfaces shown above are those which used on i-Series
devices. Other types of Communication Interfaces are not covered in this
chapter.
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