4
Installation Guide
AT-OMNI-112
Push tab
to unlock
GND
RX
TX
RS-232
IR
The AT-OMNI-112 provides transport of RS-232 protocol over IP which allows communication
between a control system and an RS-232 device. This step is optional.
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 push-spring
connector, following the wiring diagram below. If using non-tinned stranded wire, press the
orange tab, above the terminal, while inserting the exposed wire.
The same port that provides RS-232 connections also supports bidirectional IR pass-through,
allowing a device to be controlled from either the headend or the decoder endpoint. This step is
optional. IR control is supported only on port 2.
NOTE:
Typical DB9 connectors use pin 2 for TX, pin 3 for RX, and pin 5 for
ground. On some devices, the function of pins 2 and 3 are reversed.
IR emitter configuration
IR extender configuration
GND (black)
IR emitter
SIGNAL (white/black)
RX TX GND
GND (black)
SIGNAL (white/black)
Control
Unit
TX out
GND
RX TX GND
