!
Important Safety Instructions
1.Read and follow all warning notices and instructions marked on the product or included in the manual.
2.Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous high voltage points or other risks. Refer all servicing to qualified service personnel.
3.This product is to be installed only in a Restricted Access Location (dedicated equipment rooms, equipment closets or the like) in accordance with articles
4.This product is to be connected to a 48 VDC SELV supply source that is electrically isolated from the AC source.
5.The positive terminal of the 48 VDC source is to be reliably connected to earth. Connect a green/yellow earthing (grounding) wire to the protective earthing (grounding) lug connector, identified by the protective earth symbol on the chassis.
6.A readily accessible disconnect device as part of the building installation shall be incorporated in fixed wiring. The disconnect device (a 48 VDC, 20A, single pole circuit breaker or switch) must be included in the ungrounded supply conductor. Over current protection must be included with a 20A, 48 VDC fuse or circuit breaker in the ungrounded conductor. Use minimum 18 AWG fixed power source wires with strain retention.
7.Do not allow anything to rest on the power cord and do not locate the product where persons will walk on the power cord.
8.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.
9.General purpose cables are described for use with this product. 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 (0.128 mm2) telecommunication cable, or comparable cables certified for use in the country of installation.
10.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.
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.
18 | February 2005 |