Allen-Bradley 1794-IRT8 - Terminal Base Unit Wiring Methods

Publication 1794-6.5.12 - November 1997
How to Install Your Thermocouple/RTD/mV Input Module 2-3
Methods of wiring the terminal base units are shown in the illustration
below.
Wiring the Terminal Base Units (1794-TB3G shown)
!
ATTENTION: Do not daisy chain power or
ground from the terminal base unit to any ac or dc
digital module terminal base unit.
Wiring when total current draw is less than 10A
Wiring when total current draw is greater than 10A
Daisy-chaining
Individual
Total current draw through any base unit must not be greater than 10A
Combination
24V dc
24V dc
24V dc
24V dc
24V dc
24V dc
Note: Use this configuration if using any
"noisy" dc digital I/O modules in your system.
Thermocouple/RTD/mV Module wiring separate from digital wiring.
Note: All modules powered by the same power supply
must be frequency or TC/RTD/mV modules for this configuration.
Note: All modules must be frequency or TC/RTD/mV modules for this configuration.
TC/RTD/mV
Module
Digital Input
Module
TC/RTD/mV
Module
Frequency Input
Module
Digital Output
Module
Digital Input
Module
TC/RTD/mV
Module
TC/RTD/mV
Module
Frequency Input
Module
Frequency Input
Module
TC/RTD/mV
Module
Frequency Input
Module