Certifications Safety
Digi CM User Guide 189
Environmental considerations and cautions
The following is a list of environmental considerations that will ensure safe and efficient operation
of the Digi CM unit:
▪ Do not position the Digi CM unit near high-powered radio transmitters or electrical equipment,
such as electrical motors or air conditioners. Interference from electrical equipment can cause
intermittent failures.
▪ Avoid exceeding the maximum cabling distances discussed in the online cable guide.
▪ Do not install the Digi CM unit in areas where condensation, water, or other liquids may be
present. These may cause safety hazards and equipment failure.
For DC powered equipment:
▪ Install equipment in Restricted Access Areas only (dedicated equipment rooms/closets) in
accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA
70.
▪ Connect equipment to a DC supply source (reliably earthed) that is electrically isolated from the
AC source.
▪ Directly connect the equipment chassis to the DC supply system grounding electrode conductor
or a bonding jumper from a grounding terminal bar (or bus) that is connected to the DC supply
system grounding electrode conductor.
▪ Contain equipment that has a connection between the grounded conductor of the same DC
supply circuit, the grounding conductor, and also the point of grounding of the DC system in the
same immediate area. Do not ground the equipment elsewhere.
▪ Locate the DC supply source within the same premises as the equipment.
▪ Route away and secure all DC input wiring from sharp edges to prevent chaffing as well as
provide strain relief.
▪ Provide a readily accessible disconnect device and protective device a fixed wiring for a DC
power supply suitable for the specified rated voltage and current. Disconnect and protective
devices to be rated 2A maximum.
Note The Digi CM unit is intended to connect to networking devices. Do not attempt connecting to
a telephone line.
Safety instructions
CAUTION! CAUTION: Do not operate the Digi CM unit with the cover removed.
▪ To avoid shorting out the Digi CM unit when disconnecting the network cable, first unplug the
cable from the equipment and then from the network jack. When reconnecting a network cable
to the equipment, first plug the cable into the network jack and then into the equipment.
▪ To help prevent electric shock, plug the Digi CM unit into a properly grounded power source. The
cable is equipped with 3-prong plug to help ensure proper grounding. Do not use adapter plugs
or remove the grounding prong from the cable. If you have to use an extension cable, use a 3-
wire cable with properly grounded plugs.
▪ To help protect the Digi CM unit from transients in electrical power, use a surge suppressor, line
conditioner, or a continuous-protected (a power supply that cannot be interrupted) power
supply.
▪ Be sure that nothing rests on the Digi CM unit cables and that the cables are not located where
they can be stepped on or tripped over.
▪ Do not spill food or liquids on the Digi CM unit. If it gets wet, contact Technical Support.
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