Bailey Infi 90 - Page 79

MODULE POWER REQUIREMENTS
SIZING THE MODULAR POWER SYSTEM
B - 8 I-E96-506B1
®
Q4
Number of IEPAS02 power modules needed to meet
-15 V current requirements.
Q5
Total power needed.
PS
Total 5, +15, and -15 V power requirements.
PF
Total 24 V power requirement.
QS
Total number of IEPAS02 power modules needed to
power the system.
QF
Total number of IEPAF02 power modules needed to
power associated I/O.
Then solve the following equations:
QN
= Largest of Q1, Q2, Q3, Q4 and Q5.
Round up the value of QN to the next highest integer.
PS
= (
A ×
5.225) + (
C ×
15.3) + (
D ×
15.3)
PF
=
B ×
25.8
(if Q6 > 92 then set Q6 = 92)
QS
= Largest of Q1, Q3, Q4 and Q7.
Round the value of QS to the next highest integer. This number
represents the number of IEPAS02 power modules needed to
satisfy system requirements.
QF
=
QN
-
QS
QF represents the number of IEPAF02 power modules needed
to satisfy associated I/O requirements. If using N+1 redun-
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
+〈〉+++
130
-------------------------------------------------------------------------------------------------------------------------------------=
Q6
130
PF
QN
---------–=
Q7
PS
Q6
--------=
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