System Grounding; Internal Analog Inputs - Control Microsystems SCADAPack 32P Hardware Manual

This configuration uses a 5103 Power Supply module to power a SCADAPack 32P. The 5103 power
supply provides a 5V output to power the SCADAPack 32P and 5000 Series modules through the
IMC cables.
Note that no connection is made to the AC/DC PWR IN or DC PWR terminals on the SCADAPack
32P.
5103 Power Supply
AC/DC
P3
1 2
120 24
Vrms Vrms
Class 2
Transformer
3.2.7

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 SCADAPack 32P, the – side of both the 5V and the 24V supplies are connected to the
enclosure. Pins 1 and 2 on P3 are connected internally to the enclosure.
3.3

Internal Analog Inputs

The SCADAPack 32P Controller has two internal analog inputs. These internal analog inputs are
accessed form the user application program.
The ambient temperature input measures the temperature at the controller circuit board. It is useful
for measuring the operating environment of the controller and returns an integer value in the range –
40 to 75 deg C or –40 to 167 deg F. The temperature reading represents temperatures in the range -
40°C to 75°C or -40°F to 167°F. Temperatures outside this range cannot be measured.
•
For TelePACE applications use the AIN Controller Temperature register assignment to read the
ambient temperature in degrees C and degrees F.
•
For ISaGRAF applications use the aintemp I/O connection to read the ambient temperature in
degrees C and degrees F.
The lithium battery input measures the voltage of the battery that maintains the non-volatile RAM in
the controller. The reading returned from this input is in the range from 0 – 5000 representing the
battery voltage in mV. It is useful in determining if the battery needs replacement. The 3.6V lithium
battery will return a typical value of 3600 or 3700. A reading less than 3000 (3.0V) indicates that the
lithium battery requires replacement.
SCADAPack 32P Controller Hardware Manual
May 26, 2006
+ -
+ -
24V
BATT
P3
9 10
3 4 5
Optional 12 Volt
Gel Cel Battery
SCADAPack 32P
AC/DC DC PWR
PWR IN + –
1 2 3 4 5 6
11