4 Power
Supply
4.1
Overview and Power Requirements
The SCADAPack 350 is powered from an 11V DC to 30V DC input power source.
•
Input power is applied to the positive (+) and negative (-) terminals on connector P3.
of this manual for the minimum and maximum operating voltages
and input power requirements.
•
When the input voltage is below the minimum recommended voltage the SCADAPack 350 will
turn off.
•
Exceeding the maximum input voltage or applying a reverse voltage will blow the input power
fuse.
CAUTION:
Unlike the other members of the SCADAPack family, the SCADAPack 350 operates
only on a DC power sources. Connections to power sources such as 16Vac
transformers will blow the fuse and may cause damage to the SCADAPack 350.
The DC power-input voltage is used to generate 5V at 1.2A (6W) some of which is used for the
controller onboard circuitry. The output capacity of the 6W is sufficient to power the SCADAPack
350 controller board, a SCADAPack Vision operator interface with a limited number of 5000 Series
I/O modules.
The power available for any 5000 Series expansion I/O modules is limited to 5.5W (5V at 1200mA)
and depends on the controller features enabled. For 12VDC input voltages an onboard DC/DC
converter with an output capacity of 3.36W (24V at 140mA) can be used to power five 20mA analog
inputs and two 20mA output devices (loop-powered transmitters). The 12/24V DC/DC converter is
controlled by the user application program and may turned on or off. Refer to section
for more information on DC/DC converter control.
4.2
Sample Power Calculations
Example 1
: Assume we have a 5209 controller (SCADAPack 350) board with an integrated 5606
I/O module. In this example it is assumed that the controller is powered from a 12V supply, the
LAN port and 12/24V DC/DC converted features are also enabled. Also assume that all five 20mA
analog input channels and two 20mA analog output channels need to be powered. The controller
will not be running in reduced power mode. The current requirement of the controller board and I/O
module is summarized in the table below.
5V Current
24V Current
5209 Controller Board
(base current in normal mode)
80mA
20mA x 5 = 100mA (Vloop)
LAN Port
160mA
0mA
5606 I/O Module
600mA
12mA
5305 Analog output
0mA
20mA X 2 = 40mA (Vloop)
Total 840mA
140mA
(operation)
Available for I/O
expansion, USB and
COM/Visions
360mA
remaining from 1.2A
capacity
0mA
SCADAPack 350 Hardware Manual
February 14, 2007
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