Spare parts

Description

This C80-35 module provides up to 16 single-ended or eight differential input channels, each capable of converting an analog input signal to a digital value for use as required by your application.

This module provides three input ranges:

• 4 to 20mA
• 0 to 20mA
• 4 to 20mA Enhanced

The default range is 4 to 20mA with user data scaled so that 4mA correspond to a count of 0 and 20mA corresponds to a count of 32000. The other ranges are selected by changing the configuration parameters using the Alspa P80 configuration software or the Hand–Held Programmer. The range can be configured so that the input range is 0 to 20mA with user data scaled so that 0mA corresponds to a count of 0 and 20mA corresponds to a count of 32000. Full 12-bit resolution is available over the 4 to 20 and 0 to 20mA ranges.

A 4 to 20mA Enhanced range can also be selected. When this range is selected, 0mA corresponds to a count of – 8000, 4mA corresponds to a count of 0 (zero) and 20mA corresponds to a count of +32000.
The Enhanced range uses the same hardware as the 0 to 20mA range but automatically provides 4 to 20mA range scaling with the exception that negative digital values are provided to the user for input current levels between 4mA and 0mA. This gives you the capability of selecting a low alarm limit that detects when the input current falls from 4mA to 0mA, which provides for open-wire fault detection in 4 to 20mA applications.