Continuum I/O System Reference
39
Sensing AC or DC Digital Inputs
Digital input points are designed to provide an ON or OFF reading of a signal (wired
between the input and return). Normally you would associate an AC or DC voltage input
with a value measurement, however, the DI-6 modules include a voltage level trigger that
senses the presence of a range of voltages and converts those readings to ON and OFF
indications.
To sense an AC or DC digital input, configure an input point with an Electrical Type of
Digital
.
The determination of ON or OFF is based upon the following measurement thresholds:
DI-6-AC DI-6-AC-HV
AC Voltage “ON” Threshold:
16 Vrms 75 Vrms
(Above this voltage is considered “ON”)
AC Voltage “OFF” Threshold:
8 Vrms 30 Vrms
(Below this voltage is considered “OFF”)
DC Voltage “ON” Threshold:
20V 90V
(Above this voltage is considered “ON”)
DC Voltage “OFF” Threshold:
12V 45V
(Below this voltage is considered “OFF”)
Note
: When configuring a Digital point, there is a ‘Polarity’ attribute. If this attribute is
enabled, readings are reversed: ‘ON’ will occur when the input is at the normal OFF
threshold. OFF occurs at the normal ON threshold.
IN x
AC
Signal
DC
Signal
Polarity
Independent
IN x
DI-6-AC
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