Power Budget Calculation Example
The following example shows how to calculate the power budget for the DL205 system.
1. Use the power budget table to fill in the power requirements for all the system
components. First, enter the amount of power supplied by the base. Next, list the
requirements for the CPU, any I/O modules, and any other devices, such as the Handheld
Programmer, C-more HMI or the DV–1000 operator interface. Remember, even though
the Handheld or the DV–1000 are not installed in the base, they still obtain their power
from the system. Also, make sure you obtain any external power requirements, such as the
24VDC power required by the analog modules.
2. Add the current columns starting with CPU slot and put the total in the row labeled “Total
power required”
3. Subtract the row labeled “Total power required” from the row labeled “Available Base
Power”. Place the difference in the row labeled “Remaining Power Available”.
4. If “Total Power Required” is greater than the power available from the base, the power
budget will be exceeded. It will be unsafe to use this configuration and you will need to
restructure your I/O configuration.
WARNING: It is extremely important to calculate the power budget. If you exceed the power budget, the
system may operate in an unpredictable manner which may result in a risk of personal injury or
equipment damage.
Base #
0
Module Type
5 VDC (mA)
Auxiliary
Power Source
24 VDC Output (mA)
Available Base Power
D2–09B–1
2600
300
CPU Slot
D2–260
+ 330
Slot 0
D2–16ND3–2
+ 100
+ 0
Slot 1
D2–16NA
+ 100
+ 0
Slot 2
D2–16NA
+ 100
+ 0
Slot 3
F2–04AD–1
+ 50
+ 80
Slot 4
F2–02DA–1
+ 40
+ 60
Slot 5
D2–08TA
+ 250
+ 0
Slot 6
D2–08TD1
+ 100
+ 0
Slot 7
D2–08TR
+ 250
+ 0
Other
Handheld Programmer
D2–HPP
+ 200
+ 0
Total Power Required
1520
140
Remaining Power Available
2600–1520 =
1080
300 – 140 =
160
3
Chapter 3: I/O Wiring and Specifications
3–20
DL205 Installation and I/O Manual, 2nd Edition
