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Document No. 553-142
Installation Instructions
June 4, 2010
Prerequisites
CAUTION:
No power wiring is connected to the field
panel controller or other TX-I/O
components at this time.
CAUTION:
The TX-I/O island bus must be mounted
on a DIN rail (1.38" × 0.3" × 0.04"
(35 mm × 7.5 mm × 1 mm)).
For energy management installations,
NEMA Type 1 or better enclosure with DIN
rails and source of 24 Vac.
For smoke control installations, PX Series
enclosures and service boxes. See the PX
Series Service Box Installation Instructions
(553-131).
TX-I/O™ Power Supply or Bus Connection
Module.
If mounting in an enclosure:
Enclosure is installed.
The power source is installed, as
applicable.
The power is OFF.
All necessary wiring is pulled and terminated
per the layout drawing.
Power and communication wiring is
terminated to the removable plugs supplied
with the devices.
Power Requirements
1.
One of the following power sources is pulled to
the enclosure:
120 Vac, 60 Hz and terminated at the 115V
PX Series Service Box.
230 Vac, 50/60 Hz and terminated at the
230V PX Series Service Box.
24 Vac, 50/60 Hz Class 1 power limited from
a third-party transformer and connected to
a terminal block.
2. If powering a TX-I/O expansion panel, power
wiring is run from the transformer in the primary
panel to the expansion panel, if needed.
Page 2 of 4
CAUTION:
For information on extending the TX-I/O
island bus outside the enclosure, see the
APOGEE Wiring Guidelines for Field
Panels and Equipment Controllers
(125-3002).
NOTE: Depending on the module types and point
configurations used, one service box
transformer may have insufficient power for
more than two TX-I/O Power Supplies. More
power may be required if using a Modular
Series with the maximum number of TX-I/O
modules.
General Installation Requirements
CAUTION:
All devices not isolated by a Trunk
Isolator/Extender (TIE) or isolation
transformer must be connected to the
same grounding point.
CAUTION:
Do not connect TX-I/O components to a
floating system neutral. Otherwise,
equipment damage will occur.
System Neutral ( ) must be
continuous throughout the TX-I/O
Bus.
System Neutral must be connected
to building approved earth-ground
( ) at a single point only at the 24
Vac transformer.
Siemens Industry, Inc.
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