Luma-Net® Iii; Power Considerations For Control Systems; Power Requirements & Maximum Run Length - Leviton a-2000 User Manual

Control Station A Unit Load
X
Quantity of Station A's attached
Page 24
Luma-Net® III

Power Considerations for Control Systems

The control system should be carefully planned out to take into consideration
these important issues:
• Power Supply for Control Stations
• Wire Size for Power Runs
On most systems, our applications engineering department has already managed
these calculations for you so this information should be irrelevant. However, if this
is not the case, like an ASAP (Quick Ship) program, when adding on to a system
or planning for a remodel, you will want to take this information into
consideration.
Power Requirements & Maximum Run Length
Each device on a Luma-Net network has a different load (draw) and each source
of power can support a different total load (supply.) To determine the total
capacity of your network, first determine the maximum supply current of your
power source, convert that to Unit Loads, then determine the total load it can
handle by summing the load of each device.
One Unit Load = 25mA
Control Station B Unit Load
+
X
Quantity of Station B's attached
Figure 14 - Load Rating Verification Formula
The a-2000 cabinets are designed to be able to power either D4200 or D8000
stations from the internal power supply. See Table 7 for the available power from
each cabinet.
Supply
a-2000D, 12 Circuit,
Standard Power Supply
a-2000D, 24 Circuit
Standard Power Supply
NPC – XP
NPC – DHV
NPC – DLR
Table 7 -
Same formula
+
for any other attached
control Station
Maximum # of Unit Loads
40
24
49
0 (no Luma-Net)
49
Power Supply Maximum Unit Loads
<
Power Supply's
Available Unit Load