UL 1981

By order of the publisher, historical UL documents are not returnable for any reason. Once you place an order for an historical document, we cannot issue a refund, credit, or exchange of any kind.

These requirements cover computerized central station automation systems intended for use in central station, proprietary and subsidiary burglar, and fire alarm applications for the purpose of automating the signal handling and processing of change-of-status signals generated by receivers. In case of failure of an automation system, th e receiving equipment is relied on for receiving and recording change-of-status signals and the provision of an audible and visual signal that identifies the source and type of signal that requires operator attention. These systems are intended to be installed in accordance with the following:
a) The National Electrical Code, NFPA 70;
b) The National Fire Alarm Code, NFPA 72;
c) The Standard for Central-Station Burglar-Alarm Systems, UL 611; and
d) The Standard for Central-Stations for Watchman, Fire-Alarm, and Supervisory Services, UL 827.

A product that contains features, characteristics, components, materials, or systems new or different from those in use when the Standard was developed, and that involves a risk of fire, electric shock, or injury to persons, shall be evaluated using the appropriate additional component and end-product requirements as determined necessary to mai ntain the level of safety for the user of the product as originally anticipated by the intent of this Standard.