Table 1 Power Budget Calculation Sheet
To calculate the power requirement:
(1) Enter the number of devices of each type used in the system in column B.
(2) Multiply by the unit power shown in column C.
(3) Enter the result in column D.
(4) Add up column D to calculate the total power required.
Device or Sensor Type Number Unit Total
in Rack Requirement Power
(W) (W)
A B x C = D
System 57 DEVICES:
Four Channel Control Card,
Catalytic (includes bridge drive
at 200mA) ____ 12.8 ____
Four Channel Control Card,
4 - 20mA (includes loop power) ____ 8.3 ____
Engineering Card 1 1.5 1.5
DC Input Card 1 0 0
Modbus Interface 232 ____ 0.75 ____
Modbus Interface 422/485 ____ 1.50 ____
Event Printing ____ 0.75 ____
Alarm Update ____ 0.25 ____
Update Panel ____ 0.20 ____
Quad Relay Interface Card* ____ 1.7 ____
Relay Interface Assembly* ____ 6.5 ____
Analogue Output Modules (4 off)
(includes loop power) ____ 4.0 ____
Allowance for Transmitters & Sensors
powered from System 57 PSU:
Searchline ____ 5.0 ____
Searchline Excel Receiver ____ 8.0 ____
Searchline Excel Transmitter (S/R) ____ 6.5 ____
Searchline Excel Transmitter (L/R) ____ 7.5 ____
Searchline Excel Cross Duct TX & RX ____ 13.0 ____
Searchpoint 500 ____ 10.0 ____
Searchpoint Optima ____ 4.2 ____
Searchpoint Optima plus ____ 4.5 ____
Series 2000 Toxic ____ 0 0
Series 2000 Combustible
(incl UL) ____ 3.8 ____
Digi-Chem ____ 0.6 ____
Digi-Cat (includes sensor) ____ 2.0 ____
Digi-Ana Toxic ____ 0.6
Digi-Optima ____ 4.80 ____
Life Line ____ 0 ____
Others (refer to manufacturers
data for column (C) ____ x ____
Apex Toxic*
4.0
Apex Combustible* 5.5
Opus/Lifeline II Toxic* 2.4
Opus/Lifeline II Combustible* 2.9
TOTAL SYSTEM POWER REQUIREMENT
= W
*
All relays energised.
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