Rockwell Automation Publication 6181X-UM002A-EN-P - October 2017
25
Install the Computer
Chapter 2
Connect Power
Display and non-display computers have a DC input terminal block for
connection to an 18…32V DC power source.
Operate the computer in an industrial or control room environment, which
uses some form of power isolation from the public low-voltage mains.
The DC power option supports operation from safety extra-low voltage
(SELV) power source.
The power supply is internally protected against reverse polarity.
Follow these steps to connect the computer to a DC power source.
1. Turn off the main power switch or breaker.
2. Verify that the DC power wires meet these requirements:
– Material: Stranded copper, insulation 90 °C (194 °F) min
– Wire gauge: 0.823…2.08 mm
2
(18…14 AWG)
3. Secure the DC power wires to the terminal block screws.
Tighten the terminal block screws to a torque of 1.36 N•m (12 lb•in).
ATTENTION:
When you connect power to the computer for the first time,
these actions occur:
• The default BIOS setting automatically starts the computer after it is
plugged into a power source.
• You must read and accept an End User Setup procedure for computers with a
Windows operating system.
Do not disconnect power from the system until after the Windows Setup
procedure is completed. Disconnected power during this procedure can
result in a corrupted system image.
ATTENTION:
Supply the computer circuit with its own disconnect. Use an
uninterruptible power source (UPS) to help protect against unexpected
power failure or power surges.
Always shut down the Windows operating system before you disconnect power
to the computer to minimize performance degradation and operating system
failures.
ATTENTION:
Use a SELV isolated and ungrounded power supply as input
power to the computer. This power source provides protection so that under
normal and single fault conditions, the voltage between the conductors and
Functional Earth/Protective Earth does not exceed a safe value.
IMPORTANT
A functional ground connection is required for EMC compliance.
-V +V
