AT-OMNI-521
11
Installation
The AT-OMNI-521 provides RS-232 over IP which allows communication between an automation system and an RS-
232 device. This step is optional. Either the top three or bottom three set of terminals can be used for RS-232.
1.
Use wire strippers to remove a portion of the cable jacket.
2.
Remove at least 3/16” (5 mm) from the insulation of the RX, TX, and GND wires.
3.
Insert the TX, RX, and GND wires into correct terminal on the included Phoenix block. If using non-tinned
stranded wire, press the orange tab, above the terminal, while inserting the exposed wire. Repeat this step for
the TX, RX, and GND connections.
Push tab
to unlock
GND
RX
TX
RS-232 Connections
NOTE:
Typical DB9 connectors use pin 2 for TX, pin 3 for RX, and pin 5 for ground. On some
devices, pins 2 and 3 are reversed.