Surge Suppression - Rockwell Automation Allen-Bradley MicroLogix 1500 1764-24AWA Instalación E Instrucciones De Operación

Surge Suppression

ATTENTION: Inductive load devices such as motor starters and
solenoids require the use of some type of surge suppression to
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protect the controller output. Switching inductive loads without
surge suppression can significantly reduce the lifetime of relay
contacts or damage transistor outputs. By using suppression, you
also reduce the effects of voltage transients caused by interrupting
the current to that inductive device, and prevent electrical noise
from radiating into system wiring.
Grounding the Controller
ATTENTION: All devices connected to the RS-232 channel
must be referenced to base unit ground or floating. Failure to
!
follow this procedure may result in property damage or personal
injury.
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 base unit to the ground bus prior to connecting any
devices. Use AWG #14 wire. 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, see the
Industrial Automation Wiring and Grounding Guidelines publication 1770-4.1.
MicroLogix™ 1500 Programmable Controller Base Units 15
Publication 1764-5.1