Leviton Z-MAX r24sd, User Manual

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Power Control Device (PCD)
- refers to a device which controls
power. Examples of Devices in the Leviton product line which
control power are dimming racks, relay panels, A-2000, i-series
e, Z-MAX, etc. Generally PCD’s also supply a certain amount of
power to connected low voltage control devices
•
Control Devices
or
Low Voltage Control Devices
or
Device
-
these terms all refer to control devices which connect to a
Power Control Device (PCD). These devices could be simple
low voltage switches, Occupancy Sensors, or D8000 control
stations
•
Luma-Net
- is one of our network lighting control protocols.
Luma-Net is an RS-485 based control protocol used by D8000
& D4200 control devices. Many of our PCD (Power Control
Device) products have a direct data connection for a Luma-Net
device. All Luma-Net Control Devices require power in one
form or another. This power generally accompanies the data
wires
•
Unit Load -
(1) Unit load is defined as 25mA, or 0.025A. It is
an arbitrary definition by Leviton and was created to simplify
power calculations
Power Requirements & Maximum Run Length
Each Control Device used in your system has a different load
(draw) and each PCD can support a different total load (supply.)
The steps for determining the total load of your network and
verifying that the supply is sufficient are simple--or at least
logical:
Step 1:
Determine the maximum available current of your
supply, be it a PCD or other Power Supply. Convert
this to the maximum number of Unit Loads if
necessary.
Step 2:
Sum the required load of each Control Device,
expressed in unit loads
Step 3:
Verify that the Sum from Step 2 <= the maximum
available power from your supply in Step 1.
•
If this verification fails, the Sum of required loads is >
than the available supply, either use an external
power supply or reduce the number of control
devices. Or, contact our Technical Services
department for help.
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