Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 31)

2 Chapter
2–1
Wiring Your Controller
This chapter explains how to wire your MicroLogix 1000 Programmable
Controller. Topics include:
•
grounding guidelines
•
sinking and sourcing circuits
•
wiring recommendations
•
wiring diagrams, input voltage ranges, and output voltage ranges
In solid-state control systems, grounding helps limit the effects of noise due
to electromagnetic interference (EMI). Use the heaviest wire gauge listed for
wiring your controller with a maximum length of 152.4 mm (6 in.). Run the
ground connection from the ground screw of the controller (third screw from
left on output terminal rung) to the ground bus.
Important: This symbol denotes a functional earth ground terminal
which provides a low impedance path between electrical circuits
and earth for non-safety purposes, such as noise immunity
improvement.
Protective
Wrap (remove after wiring)
!
ATTENTION: All devices that connect to the user 24V power
supply or to the RS-232 channel must be referenced to chassis
ground or floating. Failure to follow this procedure may result in
property damage or personal injury.
!
ATTENTION: Chassis ground, user 24V ground, and RS-232
ground are internally connected. You must connect the chassis
ground terminal screw to chassis ground prior to connecting any
devices.
!
ATTENTION: On the 1761-L10BWB, 1761-L16BWB,
1761-L16BBB, 1761-L20BWB-5A, 1761-L32BBB, and 1761-L32BWB
controllers, the user supply 24V dc IN and chassis ground are
internally connected.
Grounding Guidelines