Installation Instructions Owner manual

MicroLogix 1400 Programmable Controllers 25

Publication 1766-IN001C-EN-P - October 2009

Grounding the Controller

In solid-state control systems, grounding and wire routing helps limit the effects of noise due

to electromagnetic interference (EMI). Run the ground connection from the ground screw of

the controller to the ground bus prior to connecting any devices. Use AWG #14 wire. For

AC-powered controllers, this connection must be made for safety purposes.

You must also provide an acceptable grounding path for each device in your application. For

more information on proper grounding guidelines, refer to the Industrial Automation Wiring

and Grounding Guidelines, publication 1770-4.1

Wiring Your Analog Channels

Analog input circuits can monitor voltage signals and convert them to serial digital data as

shown in the following illustration.

Analog Input

IV0(+) IV2(+)

IV1(+) IV3(+)

COM 2

I/8 I/10

I/9 I/11

COM 3

I/13 I/15 I/17 I/19

I/12 I/14 I/16 I/18

COM

ANA

Input Terminal Block

Sensor 1

(V) Voltage

Sensor 2

(V) Voltage

44529

Sensor 0

(V) Voltage

Sensor 3

(V) Voltage