MX-2100/2104
Installation and Operation Manual
Chapter 2 Installation
Site Requirements and Prerequisites
2-7
Calculating Allowable Power Consumption
Use the following procedure to determine whether a MX-2100 power supply
module can provide the power and current requirements of the modules installed
in the enclosure:
1. For each voltage category, add the Power Consumptions of all the modules to
be installed (take values from
Example
: To install KVF.8/FXS, KML.1 and KCL.2, the +5V consumption
needed is 8.075W, +12 is 0.457W, -12 is 0.494W.
2. Check that the total power consumption for each voltage does not exceed the
nominal power consumptions for the chosen power supply. (For KPS.4, KPS.6
and KPS.7 refer to the note above.)
Example
: For KPS.5:
8.075W
≤
15.5? Yes
0.457W
≤
4.8? Yes
0.494W
≤
4.8? Yes
3. Add together all three power consumptions (per voltage) for the given
application and check that the total power consumption per power supply
does not exceed the Maximum Total Power Per Supply. (For KPS.4, KPS.6 and
KPS.7 refer to the note above.)
Example
:
9.026
≤
25? Yes
If any one of the power supply consumption ratings (per voltage or per Maximum
Total Power Per Supply) is exceeded, use one of the following methods.
The following methods are arranged in decreasing order of preference. If any
method corrects the power supply current ratings, there is no need to proceed
with the other methods.
•
Method 1
- If you are using a MX-2104, exchange it for a MX-2100. If you are
using a MX-2100, install the KPS.6 module. A single KPS.6 module can meet
the supply requirements of most practical configurations.
•
Method 2
- Install an additional KPS module, to share the load.
•
Method 3
- Split the modules between two MX-2100 enclosures (consider
using a MX-2104 if you need no more than four additional modules). You may
also try to use an external ringer to supply necessary ring voltages instead of
deriving the ring voltage from the installed power supply modules (in cases of
FXSP voice modules).
Ratings of Ring and Feed Voltage Supplies
Two special-purpose power supply units are offered that can provide DC battery
feed and ringdown voltages for the voice modules used with MX-2100, e.g.,
KVC.1M, KVF.4, KVF.8, etc. These power supply units are independently powered
and do not draw current from the KPS modules installed in MX-2100.