Wiring diagrams – Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual User Manual
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Rockwell Automation Publication 1766-UM001H-EN-P - May 2014
Chapter 3 Wire Your Controller
This product is intended to be mounted to a well grounded mounting surface
such as a metal panel. Refer to the
Industrial Automation Wiring and Grounding
Guidelines, publication
, for additional information. Additional
grounding connections from the mounting tab or DIN rail, if used, are not
required unless the mounting surface cannot be grounded.
Wiring Diagrams
The following illustrations show the wiring diagrams for the MicroLogix 1400
controllers. Controllers with DC inputs can be wired as either sinking or sourcing
inputs. (Sinking and sourcing does not apply to AC inputs.) Refer to Sinking and
Sourcing Wiring Diagrams on page 36.
The controller terminal block layouts are shown below. The shading on the labels
indicates how the terminals are grouped.
ATTENTION: All devices connected to the RS-232/485 communication port must be referenced to controller
ground, or be floating (not referenced to a potential other than ground). Failure to follow this procedure may result
in property damage or personal injury.
• For 1766-L32BWA and 1766-L32BWAA controllers, the COM of the sensor supply is also connected to chassis
ground internally. The 24V DC sensor power source should not be used to power output circuits. It should only be
used to power input devices.
• For 1766-L32BXB and 1766-L32BXBA controllers, the VDC NEUT or common terminal of the power supply is also
connected to chassis ground internally.
TIP
Use all four mounting positions for panel mounting installation.
ATTENTION: Remove the protective debris strip before applying
power to the controller. Failure to remove the strip may cause the
controller to overheat.
ESC
OK
Grounding stamping
44519