Electrical – Digital Inputs - Honeywell CNI2 Operating And Installation Manual

CNI2 Operating and Installation Guide
ELECTRICAL – DIGITAL INPUTS
Number of inputs
Six inputs are available if not being used as outputs.
Input Configuration
Form-A or Form-B (independently configurable). Two inputs can be paired for Form-C
operation.
Input rate (sampling mode)
10 Hz maximum
Minimum input pulse width (sampling mode)
25 mS.
Sample rate (sampling mode)
1 – 50 samples per second (applies to all 6 inputs). Sample rate is user-selectable. A value of
0 selects edge-detection mode.
Debounce Count (sampling mode)
Number of samples needed to declare an input valid. This is user-selectable and each input is
independently configurable. For instance if the sample rate is 4 samples per second, and the
debounce value is set to 20, then the signal must be in the same state for 20 consecutive
samples to be declared valid, which would be for a period of 5 seconds. Debounce values are
ignored in edge-detection mode.
Input rate (edge-detection mode)
TBD Hz maximum
Minimum pulse width (edge-detection mode)
TBD mS.
Wetting current per input
33 μA nominal.
Wetting voltage
+3.3V nominal.
Input resistance
100Ω
J7, J9, J11, J12 Connector Type
2-Pin MTA with 2.54 mm (0.1") spacing. Recommended mating connector is AMP 641190-2.
Recommended Input Cable
Alpha 6300/4, Belden 9534, or equivalent having less than 100pF/ft capacitance. This cable
type is 24awg, shielded, and has a PVC jacket. Terminate only one end of the cable shield to
signal common or ground. Maximum cable length run should not exceed 1000 feet. Other
cable types or gauges can be also be used as long as careful consideration is given to suitable
wiring practices and performance.
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