Crestron
CNPWS-75
System Power Supply
Operations Guide - DOC. 8091A
System Power Supply: CNPWS-75
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System Power Supply:
CNPWS-75
Description
Functional Description
The CNPWS-75 is the system power supply device for the Cresnet remote control
system (herein referred to as the Cresnet system). The CNPWS-75 operates with an
input of 100 to 250 VAC, 2.3A (maximum) and a noise rating less than 300mV. The
CNPWS-75 provides 24 VDC, 75W to Cresnet system components. The CNPWS-75
has a fuse that protects the +24 VDC output. If the network power lines are shorted,
the fuse is blown. As a result, the NET POWER LED extinguishes.
Physical Description
The CNPWS-75 is housed in a black cold-rolled painted steel box, shown on the next
page. Silk screening is applied on the front panel of the steel case. The front panel
has two four-pin network connectors for integration of the unit into the Cresnet
system. Also located on the front panel is the fuse cover (output fuse rating, 4A) and
IEC320 connector
. There is only one LED (NET POWER) located on the CNPWS-
75. It illuminates when 24 volts are output from the unit to the network.
There are four rubber feet on the base of the unit for stability and to prevent slippage
when freestanding. Otherwise, the unit can be rack mounted using a CNXRMAK,
rack mount kit (sold separately).
Model Differences
There are two system power supply models available and selection depends whether
the unit is to be used in a domestic or international application. Due to the input
requirements, the supplied line cord differs for each model. The domestic unit is
known as the CNPWS-75 and the international unit is referred to as the CNPWSI-75.
For purposes of this Operations Guide, the term CNPWS-75 is used for either
configuration, except where noted.
