Rockwell Automation 1790P-T4T0 CompactBlock LDX I/O Thermocouple Modules - Manual (Page 9)

1 Publication 1790-UM003A-EN-P
Chapter
1
Overview
This chapter describes the 1790D-4TO/T4TO (1790P-T4TO)
Thermocouple/mV Input module and explains how the module reads
thermocouple or millivolt analog input data. Included is:
• the module’s hardware and diagnostic features
• an overview of system and module operation
• compatibility
General Description The thermocouple/mV input module supports thermocouple and millivolt
signal measurement applications that require up to four channels. It
digitally converts and stores thermocouple and/or millivolt analog data
from any combination of up to four thermocouple or millivolt analog
sensors. Each input channel is individually configurable via software for a
specific input device, and filter frequency, and provides open-circuit,
over-range and under-range detection and indication. When configured
for thermocouple inputs, the module can convert the thermocouple
readings into digital temperature readings in °C or °F. When configured
for mV inputs, the module assumes that the direct mV input signal is
linear prior to input to the module.
The data can be configured on board each module as:
engineering units x 1
The module uses a digital filter that provides high frequency noise
rejection for the input signals. The filter is programmable, allowing you
to select from seven different filter frequencies for each channel:
The module uses five input words for data and status bits. Module
configuration is stored in the module memory. The 1790D modules’
configuration is done via RSNetWorx for DeviceNet™ programming
software. See Chapter 3, Module Data, Status, and Channel Configuration
for DeviceNet , for details on module configuration. The 1790P module
configuration is explained in Appendix E.
• 10 Hz
• 25 Hz
• 50 Hz
• 60 Hz • 100 Hz
• 250 Hz
• 500 Hz