Chapter 2, 2 – install your flex i/o frequency input module, Overview – Rockwell Automation 1794-IJ2XT FLEX I/O Frequency Input Modules User Manual User Manual
Page 23: Before you install your module, Power requirements, Install your flex i/o frequency input module, Chapter

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Publication 1794-6.5.11 - September 2011
Chapter
2
Install Your FLEX I/O Frequency Input Module
Overview
This chapter provides you with pre-installation requirements and instructions
on how to install your FLEX I/O Frequency Input modules.
Before You Install
Your Module
Before installing your frequency input module in the FLEX I/O system, you
need to:
• calculate the power requirements of all modules in each FLEX I/O
system, and
• position the keyswitch on the terminal base.
Power Requirements
The wiring of the terminal base unit is determined by the current draw
through the terminal base. Make certain that the current draw does not
exceed 10 A.
Topic
Page
Before You Install Your Module
Mount the Frequency Input Module on the Terminal Base Unit
Connect Wiring to the FLEX I/O Frequency Input Module
Connecting Wiring Using a 1794-TB3G, 1794-TB3GK or 1794-TB3GS
Terminal Base Unit
Examples of Wiring to a 1794-TB3G Terminal Base Unit
ATTENTION
This FLEX I/O module does not receive primary operational power
from the backplane. 24V DC power must be applied to your module
before installation. If power is not applied, the module position may
appear to the adapter as an empty slot in your chassis.