TX-I/O Island Bus
PX Series Service Box Grounding
DANGER
The transformer secondary neutral (┴) must be connected to the building
approved earth ground ( ) whenever the transformer primary is greater than 150
Vac.
CAUTION
To reduce system electrical noise, connect the secondary of the separately-
derived power source to earth ground.
The PX Series Service Box has a grounded neutral system, which is internally
grounded through the solid green wire. When required, the neutral system must be
connected to the building approved earth ground at the enclosure where the Service
Box is installed.
PXC00122R1
From Service
Building-Approved
Earth Ground
Enclosure
Back
Lock Nut
(Green/Yellow)
Lock Washers
Enclosure Earth
Ground Stud
Under Wire Cover
To Service Box
Protective Ground
(Green/Yellow)
To Service Box
Transformer Neutral
(Green)
Connect or
Tape back
as Required
Flat Washer
-or-
Lock Washer
Detail of PX Series Enclosure Earth Ground Stud (Under Wire Cover).
For more information, see the
TALON Wiring Guidelines Manual
(588-581).
42
Siemens Industry, Inc. TALON TX-I/O Modules and Island Bus Technical Reference
588-587 CONFIDENTIAL: For internal use only 4/6/2010
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