Bailey Infi 90 - System Calculation Example Using IEPAS02 Modules Only

MODULE POWER REQUIREMENTS
SIZING THE MODULAR POWER SYSTEM
B - 6 I-E96-506B1
®
Q2
Number of IEPAS02 power modules needed to meet
24 VDC current requirements.
Q3
Number of IEPAS02 power modules needed to meet
+15 VDC current requirements.
Q4
Number of IEPAS02 power modules needed to meet
-15 VDC current requirements.
Q5
Total power needed.
QS
Total number of IEPAS02 power modules needed to
power the system.
Then solve the following equations:
QS
= Largest of Q1, Q2, Q3, Q4 and Q5.
Round the value of QS to the next highest integer. This number
represents the number of IEPAS02 power modules needed to
satisfy system requirements. If using N+1 redundancy, add 1
to the value of QS.
System Calculation Example Using IEPAS02 Modules Only
Assume that the current requirements for a set of modules
residing in a system cabinet has been calculated.
Additionally, the current requirements for 24 VDC I/O power
was calculated. The results are:
A
= 26.5 A (5 VDC current requirement)
B
= 3.1 A (24 VDC and associated I/O current)
C
= 0.9 A (+15 VDC current requirement)
D
= 0.4 A (-15 VDC current requirement)
Q1
A
13
------=
Q2
B
4
----=
Q3
C
0.8
--------=
Q4
D
0.8
--------=
Q5
A
5.225
×〈〉 B
25.8
×〈〉 C
15.3
×〈〉 D
15.3
+〈〉+++
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