Kingfisher Plus+ Hardware Manual
Calculating Power Requirements
This chapter aims to assist you in selecting an appropriate power supply module/s and
backup battery for your RTU. It also allows the power requirements of the RTU to be
checked to ensure the power supplies are not overloaded.
Note that there is an Excel™ spreadsheet that can perform the following calculations
automatically available from “
Kingfisher RTU Power Budget, Backup Battery and Solar Panel
Calculator”.
3.4.1 Total Current Consumption
PS-22 Typical current consumption at various DC voltages (mA)
Input Voltage 20 V 40 V 60 V
Basic Module, no options 34 20 19
24 V
DC
Aux Converter Installed 49 27 25
PS-12 Typical efficiency at various AC supply voltages
Input Voltage 100 V 170 V 240 V
Efficiency 85% 87% 88%
Note: No DC-DC converter installed.
Communications/Processor Modules current consumption (mA at 13.8 V
DC
)
Item CP-12 / MC-12 CP-21 CP-30 / MC-31
Basic Module, no options 70 147 135
PC-1 Typical current consumption (mA at 13.8 V
DC
)
Bare Module
24 V Aux Converter
Installed
Option S Board
Installed
Option R Board
Installed
Option P Board
Installed
54 +53 59 62 59
For Communications Option Boards please refer to the 5 V Rail Overload Check
chapter.
Hardware Manual Version 7.16
http://www.servelec-semaphore.com/
Page 56
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