Control Microsystems SCADAPack 32 - Analog Inputs

5 Analog Inputs
The 5232 controller board has two internal analog inputs, used by application programs to monitor
controller board ambient temperature and the Lithium battery voltage. The 3.6V Lithium battery
provides backup power to the RAM in case of a power failure. These internal analog inputs are
accessible by the user application program.
In addition, 5 or 8 analog input channels are available on the integrated I/O module. For example,
• The 5602 I/O module provides 5 single ended analog inputs.
• The 5601/5601A, 5604 or 5606 I/O modules provides 8 single ended analog inputs.
Refer to the hardware manual of your corresponding I/O module for wiring and configuration details
to of the I/O module analog input channels to field data. Access of the controller board analog input
data is covered in the rest of this
The ambient temperature input measures the temperature at the controller circuit board. It is useful
for measuring the temperature of the controller’s operating environment. The return value is of type
integer and falls within the range –40
o
C to 75
o
C or –40
o
F to 167
o
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.
Please refer to the respective TelePACE and ISaGRAF software manuals on how to assign the above
registers.
The 3.6V lithium battery input measures the voltage of the battery that maintains the non-volatile
RAM in the controller. The return value is in mV and falls within the range 0 – 5000 although a
typical return value of 3600-3700mV is expected. A return value less than 3000mV indicates that the
lithium battery requires replacement.
• For TelePACE applications use the AIN Controller RAM Battery V register assignment to read
the lithium battery voltage.
• For ISaGRAF applications use the ainbatt I/O connection to read the lithium battery voltage.
SCADAPack 32 Controller Hardware Manual
May 24, 2006
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