Rockwell Automation 1764-xxxx MICROLOGIX 1500 PROGRAMMABLE CONTROLLERS - Manual (Page 58)

Publication 1764-UM001B-EN-P - April 2002
3-8 Wiring Your Controller
Wiring Diagrams This section shows the wiring diagrams for the MicroLogix 1500
controllers. Controllers with dc inputs can be wired as either sinking
or sourcing configuration. (Sinking and sourcing does not apply to ac
inputs.) See pages 3-12 through 3-15 for sinking and sourcing wiring
diagrams.
Miswiring - 1764-28BXB Only
The following table shows miswiring conditions and the
consequences of improper wiring:
TIP
This symbol denotes a protective earth ground
terminal which provides a low impedance path
between electrical circuits and earth for safety
purposes and provides noise immunity improvement.
This connection must be made for safety purposes.
Condition Result
Operating with Voltage
Less than 20.4V dc This will not damage the base unit. The base unit may not
power up.
IMPORTANT
This is not recommended. You must
verify that the line voltage remains
within specified limits.
Reverse Wiring of the Line
Terminals (0 to 30V dc) Reverse wiring will not damage the base unit. The base unit
will not power up.
Applied Voltage Level
Exceeds the Published
Recommended Value
(i.e. applying 120V ac to
240V ac) Exceeding the published recommended voltage may result
in permanent damage to the base unit.