Rockwell Automation 1762-OV32T MicroLogix Solid State 24V DC Sink Output - Manual (Page 11)

MicroLogix 1762-OV32T Solid State 24V DC Sink Output Module 11
Publication 1762-IN021B-EN-P - July 2013
Field Wiring Connections
Grounding the Module
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 .
WARNING
EXPLOSION HAZARD
• In Class I, Division 2 applications, the bus connector must be fully seated and
the bus connector cover must be snapped in place.
• In Class I, Division 2 applications, all modules must be mounted in direct
contact with each other as shown on Page 10. If DIN rail mounting is used, an
end anchor must be installed ahead of the controller and after the last 1762
I/O module.
ATTENTION
To comply with the CE Low Voltage Directive (LVD), all connected I/O must be
powered from a source compliant with Safety Extra Low Voltage (SELV) or
Protected Extra Low Voltage (PELV).
ATTENTION
Recommended Surge Suppression. Use a 1N4004 diode reverse-wired across
the load for transistor outputs switching 24V DC inductive loads. For additional
details, refer to Industrial Automation Wiring and Grounding Guidelines,
Allen-Bradley publication
1770-4.1 .
Typical Loading Resistor - To limit the effects of leakage current through solid
state outputs, a loading resistor can be connected in parallel with your load. Use
a 5.6 K
Ω, 0.5 W resistor for transistor outputs, 24V DC operation.
WARNING
If you connect or disconnect wiring while the field-side power is on, an electrical
arc can occur. This could cause an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.