User Guide
23
Inputs
The following diagram shows the configuration for the DC-coupled frequency
input:
Pull-up/down option
Application
sensor
Internal to
product
Filter
+
-
Figure 9: DC-coupled frequency input configuration
5.6. Analog Inputs
Analog inputs are typically used to read electrical signals that span a voltage
range.
The CM2115 has 8 analog inputs:
INPUT9_AD through INPUT16_AD
Two of the analog inputs (INPUT9_AD and INPUT10_AD) are type 1,
amplified
,
and the remaining analog inputs (INPUT11_AD through INPUT16_AD) are type
2,
attenuated
.
Analog inputs can also be configured to function as programmable digital inputs.
5.6.1. Analog Input Capabilities
Type 1 analog inputs have programmable gain and are driven through an
amplifier to provide a wider array of input range options. These inputs have
programmable pull-up or pull-down resistor values, including a resistor that can
be used for 4 to 20mA sensor readings.
