RAD Data Communications ASM-MN-214 Installation And Operation Manual - Handling Energized Products
Handling Energized Products
General Safety Practices
Do not touch or tamper with the power supply when the power cord is connected. Line voltages
may be present inside certain products even when the power switch (if installed) is in the OFF
position or a fuse is blown. For DC-powered products, although the voltages levels are usually
not hazardous, energy hazards may still exist.
Before working on equipment connected to power lines or telecommunication lines, remove
jewelry or any other metallic object that may come into contact with energized parts.
Unless otherwise specified, all products are intended to be grounded during normal use.
Grounding is provided by connecting the mains plug to a wall socket with a protective ground
terminal. If a ground lug is provided on the product, it should be connected to the protective
ground at all times, by a wire with a diameter of 18 AWG or wider. Rack-mounted equipment
should be mounted only in grounded racks and cabinets.
Always make the ground connection first and disconnect it last. Do not connect
telecommunication cables to ungrounded equipment. Make sure that all other cables are
disconnected before disconnecting the ground.
Connecting AC Mains
Make sure that the electrical installation complies with local codes.
Always connect the AC plug to a wall socket with a protective ground.
The maximum permissible current capability of the branch distribution circuit that supplies power
to the product is 16A. The circuit breaker in the building installation should have high breaking
capacity and must operate at short-circuit current exceeding 35A.
Always connect the power cord first to the equipment and then to the wall socket. If a power
switch is provided in the equipment, set it to the OFF position. If the power cord cannot be
readily disconnected in case of emergency, make sure that a readily accessible circuit breaker or
emergency switch is installed in the building installation.
In cases when the power distribution system is IT type, the switch must disconnect both poles
simultaneously.
Connecting DC Power
Unless otherwise specified in the manual, the DC input to the equipment is floating in reference
to the ground. Any single pole can be externally grounded.
Due to the high current capability of DC power systems, care should be taken when connecting
the DC supply to avoid short-circuits and fire hazards.
DC units should be installed in a restricted access area, i.e. an area where access is authorized
only to qualified service and maintenance personnel.
Make sure that the DC power supply is electrically isolated from any AC source and that the
installation complies with the local codes.
The maximum permissible current capability of the branch distribution circuit that supplies power
to the product is 16A. The circuit breaker in the building installation should have high breaking
capacity and must operate at short-circuit current exceeding 35A.