5V Current
(mA)
11-30V Current (mA)
5232 Controller Board
500 0
5606 I/O Module
600 30 + 200mA
Total
1100 230
The controller board has 1300mA available from the 5V supply. A minimum of 100mA is available
from the 24V supply. Additional current is available from the 24V supply when the 5V is not loaded
to its 1300mA maximum.
The total available 24V supply current is calculated as follows:
24V current = 100 + ((1300 – Total Current @ 5V) x 0.25)
where:
100 = Minimum current @ 24V
1300 = Maximum current @ 5V
Total Current @ 5V = Sum of 5V current required for system
0.25 = Derating factor is a constant
24V current = 100 + ((1300 – 1100) x 0.25) =
150mA.
The available current (150mA) is less than the required current (230mA) and as such it is not
possible to operate this configuration from an AC source unless the number of current loops is
reduced by 80mA.
4.3 System Grounding
In most applications, it is desirable to ground the system by connecting the system power supply
common, to the chassis or panel ground.
On the 5232 controller board, the logic ground (pin 2) and the negative terminal of the DC PWR or
the 24V power source (pin 6) on connector P3 are all referenced to the earth ground (pin 1).
Controller Board
AC/ DC
PWR IN
DC PWR
+ –
1 23456
P3
Figure 6: Grounding Configuration
SCADAPack 32 Controller Hardware Manual
May 24, 2006
17
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