4
To completely turn off the system, disconnect the power connection to all
power supplies.
For DC power supplies, locate the circuit breaker on the panel board that
services the DC circuit, switch the circuit breaker to the off position, and tape
the switch handle of the circuit breaker in the off position.
Do not touch the power supply when the power cord is connected. Line
voltages are present within the power supply even when the power switch is
off and the power cord is connected.
Connecting Cables
When you connect cables, note the following guidelines.
Do not work on the system or connect or disconnect cables during periods of
lightning activity.
Working with Lasers
If your system includes a fiber-optic port, note the following guidelines.
To avoid exposure to radiation, do not stare into the aperture of a fiber-optic
port. Invisible radiation might be emitted from the aperture of the port when
no fiber cable is connected.
Always keep unused fiber-optic ports capped with a clean dust cap.
Preventing EMI
When you run wires for any significant distance in an electromagnetic field,
electro magnetic interference (EMI) can occur between the field and the
signals on the wires.
Bad plant wiring can result in radio frequency interference (RFI).
Strong EMI, especially when it is caused by lightning or radio transmitters, can
destroy the signal drivers and receivers in the system, and can even create an
electrical hazard by conducting power surges through lines and into the system.
If Strong EMI occurs in the installation place, consult RFI experts to get rid of it.
Disposing of the System
Dispose of the system and its components (including batteries) as specified by all
national laws and regulations.
