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1900-A2-GN20-00 July 2002 B
Important Safety Instructions
1. Read and follow all warning notices and instructions marked on the product or included in the manual.
2. All installation and service must be performed by qualified service personnel, as opening or removing covers may
expose you to dangerous high voltage points or other risks.
3. Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation of the product and to
protect it from overheating, these slots and openings must not be blocked or covered.
4. Special cables, which may be required by the regulatory inspection authority for the installation site, are the
responsibility of the customer. To reduce the risk of fire, use a UL Listed or CSA Certified, minimum No. 26 AWG
telecommunication cable.
5. When installed in the final configuration, the product must comply with the applicable Safety Standards and
regulatory requirements of the country in which it is installed. If necessary, consult with the appropriate regulatory
agencies and inspection authorities to ensure compliance.
6. A rare phenomenon can create a voltage potential between the earth grounds of two or more buildings. If products
installed in separate buildings are interconnected, the voltage potential may cause a hazardous condition.
Consult a qualified electrical consultant to determine whether or not this phenomenon exists and, if necessary,
implement corrective action prior to interconnecting the products.
7. When product is configured for DC output, connect the product to a 48 VDC SELV supply source that is electrically
isolated from the ac source. The 48 VDC source is to be reliably connected to earth. Connect the earthing
(grounding) wire to the protective earthing (grounding) lug connector, identified by the protective earth symbol.
8. Do NOT apply power to both AC and DC inputs simultaneously.
9. A readily accessible disconnect device as part of the building installation shall be incorporated in fixed wiring. The
disconnect device (a 48 VDC, 10 amp circuit breaker or switch) must be included in the ungrounded supply
conductor. Over current protection must be included with a 10 amp, 48 VDC fuse or circuit breaker.
10. This product is to be installed only in a Restricted Access Location (dedicated equipment rooms, equipment
closets or the like) in accordance with articles 110-16, 110-17 and 110-18 of the National Electrical Code,
ANSI/NFPA 70.
11. In addition, if the equipment is to be used with telecommunications circuits, take the following precautions:
— Never install telephone wiring during a lightning storm.
— Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
— Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the
network interface.
— Use caution when installing or modifying telephone lines.
— Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of
electric shock from lightning.
— Do not use the telephone to report a gas leak in the vicinity of the leak.
12. CAUTION: An energy hazard exists on the backplane. Do not touch or bridge pins on the connectors.
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