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NetArrays Configuration
The 3108 and 3118 High-Level Analog Input cards provide eight differential analog input points.
The channel input data can be accessed as a floating-point voltage value (Float Variable). Filter
parameters are provided for signal conditioning of the channel inputs.
T
he Chassis Processor monitors each channel’s input and creates a Sequence-of-Events record
if the input goes above or below the trip points configured for the channel. The SOE records,
which contain the Tag of the input, its new value, and a time stamp, are stored in an SOE
Archival file by the RTPADA utility. When utilizing the SOE functionality, the maximum signal
frequency is 500 Hz. Refer to the RTPADA Alarm and Data Archive System documentation for
more information. The RTP3000M and RTP3100M do not provide SOE.
This card provides input signal ranges of
10 V. In order to measure current, the 3099/11
Termination Modules contain eight 0.01% precision 250
resistors that convert the input
currents to voltages for measurement by the card. For example, a 4 to 20 mA input range will be
displayed in NetArrays as 1 to 5 volts. Calibration inputs are available for A/D converter testing.
NetArrays also returns an error detection status word for the card.
Card Properties
NOTE
: Card properties for the 3108 and 3118 cards are the same.
