Do-more T1H Series PLC Hardware User Manual, 1st Edition, Rev. C
4–8
Chapter 4: Specifications - Terminal Bases and Power Supplies
Power Budget Calculation Example
The following example shows how to calculate the power budget for a Do-more T1H Series
PLC system.
Note 1:
An external user power supply must be used if the 24VDC current requirement exceeds the T1K-01AC
24VDC auxiliary supply.
1. Fill in the information for the CPU, I/O modules, and any other devices that will use
system power, including devices that use the 24VDC output. Devices which fall into
the “Other” category are devices such as an operator interface which also has power
requirements but do attach as a module to the system.
2. Add the current columns starting with the CPU and put the total in the row labeled
“Maximum power required”.
3. Subtract the row labeled “Maximum power required” from the “Power Supplied”. Place
the difference in the row labeled “Remaining Power Available”.
4. If “Maximum Power Required” is greater than “Power Supplied” in either of the two
columns, the power budget will be exceeded. It will be unsafe to use this configuration
and you will need to restructure your configuration.
PLC
Power Supply #1
Part Number
5VDC (mA)
Required
24VDC (mA)
Required
Power Supplied T1K-01AC
2000
300
CPU
T1H-DM1E
275
0
Module
T1K-16NA-1
70
0
Module
T1K-16TA
450
0
Maximum power required
795
0
Remaining power available
2000-795 = 1205
300-0 = 300
Power Supply #2
Part Number
5VDC (mA)
Required
24VDC (mA)
Required
Power Supplied T1K-01AC
1500
500
Module
T1K-08AD-2
75
50
Module
T1K-08AD-2
75
50
Module
T1K-16TD1
200
400
Module
T1K-08TR
350
0
Module
T1K-08ND3
35
0
Maximum power required
735
500
Remaining power available
1500-735 = 765
500-500 = 0
(see note 1)
