Specifications

v
Power Source
This product is intended to operate from a power source that does not apply more than the
specified volts RMS indicated on the rear panel of the unit, as referenced between the supply
conductors or between either supply conductor and ground.
Grounding the PX-603 Multi-Room Expander
This product is grounded through the ground conductor of the power cord. To avoid the
potential of electrical shock, plug the power cord into a properly wired and grounded recep-
tacle before operating the PX-603. A protective ground connection, by way of the ground
conductor in the power cord, is essential for safe operation. A standard 3-pin IEC type in good
operational condition is the only acceptable cord that may be used to connect the PX-603 to a
power source.
Fuses
To avoid potential fire, electrical hazard and damage to internal components, replace fuses only
with fuses of the correct type, voltage and current rating as specified in this manual.
Removal of PX-603 Cover and Front Panel
To avoid personal injury and to ensure proper operation, do not remove the PX-603 cover or
front panel except as directed within this manual. Do not operate the unit without the covers
and panels properly installed.
Operating Environment
For the best operating results, install the PX-603 in an area where it will not be exposed to
direct sunlight or any heat source. The unit should be operated in a temperature range from
40˚ to 95˚F (5˚ to 35˚C). Place the unit where there is sufficient air circulation. It generates
heat and must be ventilated.
PX-600 Software
The PX-603 will only operate in PX-600 systems with software version 2.0 or above. See
page 1 of this manual for additional information.
KPS Software
KPS keypads must have software version 1.6 or above to operate correctly with the PX-600/
PX-603 system. See page 1 of this manual for additional information.