BRX User Manual, 2nd Edition Appendix B Appxb
User Manual: Appendix B BRX Do-more Platform User Manual and Inserts
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appendix
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BrX MPu
PoWer BudGetInG
In This Appendix...
Power Budget Form ................................................................................................... B-2
Power Budget Worksheet .......................................................................................... B-3
BRX MPU Available Expansion Power ....................................................................... B-4
BRX MPU POM Power Consumed ............................................................................ B-5
BRX MPU Expansion Module Power Consumed ...................................................... B-6
Power Budget Examples ............................................................................................ B-9
Appendix B: BRX MPU Power Budgeting
BRX User Manual, 2nd Edition
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BRX MPU Power Budget
The BRX MPU has a limited amount of power available to supply the expansion modules.
When designing a BRX system the power budget should be taken into account to be sure that
your system will perform as expected.
A general rule of thumb is that when there are 32 or more points of relay expansion modules
in a system, a power budget calculation must be performed to ensure that there is
enough available power to accommodate all expected modules.
On the following pages you will find a worksheet and power budget tables to help you determine
your system total power budget requirement. If the calculations exceeds the total available
power, you may need to consider using an additional MPU or using a Remote I/O solution to
satisfy the system requirements.
Examples are also included to help show how the calculations should be performed.
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.
Power Budget Form
1. Find the Watts available for the BRX MPU that you will be using. Put this value in line 1 -
MPU section of the worksheet.
2. If you are using a POM (Pluggable Option Module), find the watts consumed and put this
value in line 2 - POM section of the worksheet.
3. For each Expansion Module that you will be using, find the watts consumed and put this value
in the appropriate slot that the module will reside in, lines 3 through 10.
4. Add the values located in the POM Watts and Slot 1 through 8, lines 2 through 10. Write the
value of this sum in line 11 - Total Watts Consumed.
5. Subtract line 11 - Total Watts Consumed from line 1 - MPU Watts Available. Write this value
in line 12 - Watts Remaining.
6. If the value in line 12 - Watts Remaining is a negative number, your system is consuming more
Watts than the MPU is capable of providing. This system would be unsafe as designed. You will
need to reconsider your design. If the remaining wattage is zero or more than zero, the system design
is good.
Appendix B: BRX MPU Power Budgeting
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Power Budget Worksheet
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.
Power Budget Worksheet
Line Item Part # Watts
1MPU
2POM
3Slot 1
4Slot 2
5Slot 3
6Slot 4
7Slot 5
8Slot 6
9Slot 7
10 Slot 8
11 Total Watts Consumed (Add lines 2 thru 10)
12 Watts Remaining (Line 1 - line 11)
Appendix B: BRX MPU Power Budgeting
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BRX MPU Available Expansion Power
The following tables show the available power for each of the BRX MPU’s. Use the wattages
shown as the total available power when calculating the power budget.
MPU Total Power Available
Model # Built-in
Inputs
# Built-in
Outputs
Total Available
Power (W)
BX-DM1E-M 0
0 21.3
BX-DM1E-M-D 0
0 21.3
BX 10
BX-DM1-10ED1-D 6
4 8.5
BX-DM1-10ED2-D 6
4 8.5
BX-DM1-10ER-D 6
4 8.3
BX-DM1-10AR-D 6
4 8.3
BX 10E
BX-DM1E-10ED13-D 6
4 7.3
BX-DM1E-10ED23-D 6
4 7.3
BX-DM1E-10ER3-D 6
4 7.0
BX-DM1E-10AR3-D 6
4 7.0
BX 18
BX-DM1-18ED1 10
8 20.2
BX-DM1-18ED2 10
8 20.2
BX-DM1-18ER 10
8 19.6
BX-DM1-18AR 10
8 19.6
BX-DM1-18ED1-D 10
8 20.2
BX-DM1-18ED2-D 10
8 20.2
BX-DM1-18ER-D 10
8 19.6
BX 18E
BX-DM1E-18ED13 10
8 18.8
BX-DM1E-18ED23 10
8 18.8
BX-DM1E-18ER3 10
8 17.9
BX-DM1E-18AR3 10
8 17.9
BX-DM1E-18ED13-D 10
8 18.8
BX-DM1E-18ED23-D 10
8 18.8
BX-DM1E-18ER3-D 10
8 17.9
Appendix B: BRX MPU Power Budgeting
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MPU Total Power Available, continued
BRX MPU POM Power Consumed
The following chart shows the power consumed by each of the BRX POMs. Use the wattages
shown as the amount to be subtracted from the total available wattage when calculating the
power budget.
Total MPU Power Available
Model # Built-in
Inputs
# Built-in
Outputs
Total Available
Power (W)
BX 36
BX-DM1-36ED1 20
16 18.7
BX-DM1-36ED2 20
16 18.7
BX-DM1-36ER 20
16 17.6
BX-DM1-36AR 20
16 17.6
BX-DM1-36ED1-D 20
16 18.7
BX-DM1-36ED2-D 20
16 18.7
BX-DM1-36ER-D 20
16 17.6
BX 36E
BX-DM1E-36ED13 20
16 16.4
BX-DM1E-36ED23 20
16 16.4
BX-DM1E-36ER3 20
16 15.3
BX-DM1E-36AR3 20
16 15.3
BX-DM1E-36ED13-D 20
16 16.5
BX-DM1E-36ED23-D 20
16 16.5
BX-DM1E-36ER3-D 20
16 15.3
POM Power Consumption
Model Consumption (W)
BX-P-SER2-RJ12
0.2
BX-P-SER2-TERM
0.2
BX-P-SER4-TERM
0.2
BX-P-USB-B
0.1
BX-P-ECOMLT
0.4
Appendix B: BRX MPU Power Budgeting
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BRX MPU Expansion Module Power Consumed
The following tables show the power consumed by each of the BRX Expansion Modules.
Use the wattages shown as the total amount to be subtracted from the available wattage when
calculating the power budget.
BRX Discrete Input Expansion Modules
BRX Discrete Output Expansion Modules
BRX Output Expansion Modules
Power Consumption
Model Inputs/
Module
Outputs/
Module
Consumption
(W)
BX-05TRS
0 5 1.8
BX-08TA
0 8 0.4
BX-08TD1
0 8 0.4
BX-08TD2
0 8 0.4
BX-08TR
0 8 1.7
BX-12TA
0 12 0.5
BX-12TD1
0 12 0.5
BX-12TD2
0 12 0.5
BX-12TR
0 12 2.5
BX-16TD1
0 16 0.5
BX-16TD2
0 16 0.5
BX-16TR
0 16 3.4
BRX Input Expansion Modules
Power Consumption
Model Inputs/
Module
Outputs/
Module
Consumption
(W)
BX-08NA
8 0 0.2
BX-08NB
8 0 0.2
BX-08ND3
8 0 0.2
BX-08NF3
8 0 0.2
BX-12NA
12 0 0.3
BX-12NB
12 0 0.3
BX-12ND3
12 0 0.3
BX-16NA
16 0 0.3
BX-16NB
16 0 0.3
BX-16ND3
16 0 0.3
Appendix B: BRX MPU Power Budgeting
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BRX Discrete Input/Output Combination Expansion Modules
BRX Combination Expansion
Modules Power Consumption
Model Inputs/
Module
Outputs/
Module
Consumption
(W)
BX-08CD3R
4 4 1.0
BX-12CD3D1
8 4 0.3
BX-12CD3D2
8 4 0.3
BX-16CD3D1
8 8 0.4
BX-16CD3D2
8 8 0.4
Appendix B: BRX MPU Power Budgeting
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BRX Analog Input/Output Expansion Modules
BRX Analog Expansion Modules
Power Consumption
Type Model Inputs/
Module
Outputs/
Module
Consumption
(W)
In BX-08AD-1
8 0 0.1
In BX-08AD-2B
8 0 0.1
In BX-04THM
4 0 0.1
Out BX-08DA-1
0 8 0.1
Out BX-08DA-2B
0 8 0.1
Appendix B: BRX MPU Power Budgeting
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Power Budget Examples
Example 1
This example shows that the selected configuration is within the power budget. This is a
sound configuration and will work as designed.
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.
Power Budget Worksheet
Line Item Part # Watts
1MPU
BX-DM1-18ED1 20.20
2POM
3Slot 1
BX-08ND3 0.20
4Slot 2
BX-16ND3 0.30
5Slot 3
BX-16TR 3.40
6Slot 4
BX-16TR 3.40
7Slot 5
8Slot 6
9Slot 7
10 Slot 8
11 Total Watts Consumed (Add lines 2 thru 10) 7.30
12 Watts Remaining (Line 1 - line 11) 12.90
Appendix B: BRX MPU Power Budgeting
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Example 2
This example shows that the selected configuration is within the power budget. This is a sound
configuration and will work as designed.
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.
Power Budget Worksheet
Line Item Part # Watts
1MPU
BX-DM1E-36ER3 15.30
2POM
BX-P-ECOMLT 0.40
3Slot 1
BX-08NA 0.20
4Slot 2
BX-16ND3 0.30
5Slot 3
BX-16ND3 0.30
6Slot 4
BX-16TD1 0.50
7Slot 5
BX-16TD1 0.50
8Slot 6
BX-16TR 3.40
9Slot 7
BX-05TRS 1.80
10 Slot 8
BX-05TRS 1.80
11 Total Watts Consumed (Add lines 2 thru 10) 9.20
12 Watts Remaining (Line 1 - line 11) 6.10
Appendix B: BRX MPU Power Budgeting
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Example 3
This example shows that the selected configuration will exceed the power budget. This is an
unsafe configuration and will not work as designed. One way to correct this is to add Remote
I/O to this system for additional I/O capability.
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 could result in a risk of personal injury or
equipment damage.
Power Budget Worksheet
Line Item Part # Watts
1MPU
BX-DM1E-36ER3 15.30
2POM
BX-P-SER2-TERM 0.20
3Slot 1
BX-16NA 0.30
4Slot 2
BX-16NA 0.30
5Slot 3
BX-16NA 0.30
6Slot 4
BX-16TR 3.40
7Slot 5
BX-16TR 3.40
8Slot 6
BX-16TR 3.40
9Slot 7
BX-16TR 3.40
10 Slot 8
BX-16TR 3.40
11 Total Watts Consumed (Add lines 2 thru 10) 18.10
12 Watts Remaining (Line 1 - line 11) -2.80
Appendix B: BRX MPU Power Budgeting
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NOTES:
