Honeywell MC-TAMT04 Low Level Input Multiplexer

Honeywell MC-TAMT04 Low Level Input Multiplexer

Functional Description

High and low level analog input (HLAI + LLAI - 8) processors both perform signal conversion and conditioning functions:

• PV Source (Auto, Manual, Substituted)

• PV Clamping

• EU Conversion

• PV Value Status

• PV Filter (Single Lag)

• Bad PV

• PV Hi/Lo

• PV HiHi/LoLo

• PV Rate-of-Change +/-

• Software Calibration

• Low PV Cutoff

They perform engineering unit conversion, including fifth-order polynomial temperature input characterization, if the high level processor receives these inputs from mV/I converters. Through use of a dual processor design and custom integrated circuits, the low level analog input processor supports software configuration per channel for different thermocouples or RTD types with excellent resolution and accuracy. Open thermocouple detection is performed once per scan so that no bad data is propagated for control processing.

The Low Level Multiplexer (LLMUX) processor provides an economical way to bring in a large number of data acquisition signals. Each processor can handle 32 points, using two 16-point FTAs. Every point is scanned once per second with a one second scan delay for processing. Open thermocouple detection is performed every 30 seconds for all points. Options for either local or remote cold junction reference are available. 

Technical Specifications