products

Thermocouple Modules
A thermocouple input (TC) module includes three independent input channels.
Each input channel receives variable voltage signals from each point, performs thermocouple linearization and cold-junction compensation, and converts the result to degrees Celsius or
Fahrenheit. Each channel then transmits 16-bit signed integers representing
0.125 degrees per count to the three main processors on demand. In TMR
mode, a value is then selected using a mid-value selection algorithm to ensure
correct data for every scan.
Each thermocouple input module is programmable to support one thermocouple
type, selected from J, K and T for standard thermocouple input
modules and from J, K, T and E for  Failure of any diagnostic on any
channel activates the Fault indicator, which in turn activates the chassis
alarm signal. The module Fault indicator merely reports a channel fault, not
a module failure. The module continues to operate properly with as many as two
faulty channels.

The thermocouple input module supports hot-spare capability which
allows online replacement of a faulty module.The thermocouple input
module requires a separate external termination panel (ETP) with a cable
interface to the Tricon backplane.
Each module is mechanically keyed to prevent improper installation in a configured chassis. isolated thermocouple input modules.
The isolated module allows users to select upscale or downscale burnout
detection with the TriStation software.
For non-isolated modules, upscale or downscale burnout detection depends
on the field termination selected. Triplicated temperature transducers
residing on the field termination panel support cold-junction compensation.
Each channel of a thermocouple input module performs auto-calibration using
internal precision voltage references.
On the isolated module, a faulting coldjunction transducer is annunciated by a
cold-junction indicator on the front panel.
Each module performs complete ongoing diagnostics on each channel.