INTRODUCTION
I-E96-506B1 B - 1
APPENDIX B - MODULE POWER REQUIREMENTS
INTRODUCTION
This section lists the power requirements of INFI 90 modules,
termination units and termination modules. Use this informa-
tion to calculate the +5, +15, -15 and +24 VDC module current
requirements for each INFI 90 cabinet. The procedure for cal-
culating current requirements includes a worksheet for calcu-
lating any current requirements for system powered I/O.
After calculating the current requirements for each cabinet,
calculate the number of modular power supplies needed for
each cabinet by following the instructions in SIZING THE
MODULAR POWER SYSTEM in this section. Finally, follow the
procedure to verify that the total current draw of the power
cabinet is within the power entry panel specifications.
CALCULATING CURRENT REQUIREMENTS
Tables B-1 and B-2 contain a list of all INFI 90 modules, termi-
nation units and termination modules, and their operating
current requirements. Use Table B-3 to calculate system pow-
ered I/O current requirements. To use the information in these
tables:
NOTE:
Current consumption values listed in the tables apply to one
module. Multiply the value of current consumption per module by the
number of those modules in the cabinet. For example, if a cabinet
contains four IMASI02 modules, the total +5 VDC current consump-
tion of these modules is 4 x 85 mA = 340 mA.
1. Make a list of modules contained in the cabinet you are siz-
ing for modular power supplies.
2. Calculate the +5 VDC current requirement for each
cabinet.
a. Refer to Table B-1 for the +5 VDC current requirement
of each module.
b. Total the +5 VDC current requirement per cabinet.
3. Calculate the +15 VDC current requirement for each
cabinet.
a. Refer to Table B-1 for the +15 VDC current requirement
of each module.
b. Total the +15 VDC current requirement per cabinet.
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