3.5 Interrupt
Input
The SCADAPack 32P has one Interrupt digital input. This input is labeled
DINT
on the P4 terminal
connector. This input operates as a DC digital input or as a counter input.
•
For DC input the maximum input voltage is 28V and the minimum voltage to turn the input ON
is 2.5V.
•
For counter input the maximum frequency is 500Hz.
The
INT
input can be used as both a digital input and as a counter in an application program.
•
For TelePACE applications use the
CNTR Controller Interrupt Input
register assignment to
read the INT/Cntr input as a counter and the
DIN Controller Interrupt Input
register assignment
to read the INT/Cntr input as a digital input.
•
For ISaGRAF applications use the
cntrint
I/O connection to read the INT/Cntr input as a
counter input and the
dinint
I/O connection to read the INT/Cntr input as a digital input.
The diagram below shows how to wire this input.
3
4
+
+
2.5-28V
–
INT
2
1
5
6
7
8
P4
—
3.6 Status
Output
The SCADAPack 32P status output indicates an alarm condition to an external device. The output is
ON (capable of conducting current) during normal operation. The output is OFF (high impedance)
during the following conditions:
•
Power failure.
•
SCADAPack 32P RESET.
•
Application program defined conditions.
The status output is an optically isolated transistor. The polarity of the output must be observed. The
output current must be limited to 60mA during the ON condition. The output voltage must be limited
to 30V during the OFF condition.
SCADAPack 32P Controller Hardware Manual
May 26, 2006
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