Calculating Power Requirements; Total Current Consumption - semaphore KINGFISHER PLUS+ Hardware Reference 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
Calculator".

3.4.1 Total Current Consumption

PS-22 Typical current consumption at various DC voltages (mA)
Input Voltage
Basic Module, no options
24 V Aux Converter Installed
DC
PS-12 Typical efficiency at various AC supply voltages
Input Voltage
Note: No DC-DC converter installed.
Communications/Processor Modules current consumption (mA at 13.8 V
Basic Module, no options
PC-1 Typical current consumption (mA at 13.8 V
24 V Aux Converter
Bare Module
54
For Communications Option Boards please refer to the
Hardware Manual Version 7.16
"Kingfisher RTU Power Budget, Backup Battery and Solar Panel
20 V
34
49
100 V
Efficiency 85%
Item CP-12 / MC-12
70
Option S Board
Installed Installed
+53
http://www.servelec-semaphore.com/
Kingfisher Plus+ Hardware Manual
40 V 60 V
20 19
27 25
170 V 240 V
87% 88%
CP-21
147
)
DC
Option R Board
Installed
59 62
5 V Rail Overload Check
)
DC
CP-30 / MC-31
135
Option P Board
Installed
59
chapter.
Page 56