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Cisco Catalyst 3550 Series Switches

Documentation Update Notification for Products with In-Line Power


July 15, 2003



Products Affected

Product

Catalyst 3524

Catalyst 3550

Catalyst 4000

Catalyst 4500

Catalyst 6500

Problem Description

Hardware Installation Guides are being amended to add new electrical warning for in-line power also known as power over ethernet.

Background

As a standard procedure and policy to keep customers advised of general safety hazards, Cisco product documentation includes warnings and advisories to customers. Hardware Installation Guides for products with in-line power devices have been revised to alert customers of potentially higher voltage on data circuits. Data circuits typically carry Safety Extra Low Voltage (SELV*) that is limited to 60Vdc. Since some of the circuits with in-line power devices may be considered data circuits, operational and maintenance technicians may not be aware that potentially higher Telecommunications Network Voltages (TNV*) voltages may be present on these data circuits. For example, certain punch down panels or terminal blocks may be on a circuit with in-line power devices that has TNV voltages and the technician may be expecting only SELV voltages.

* Definition of terms: SELV - Safety Extra Low Voltage - limited to 60Vdc and 42.4Vac peak. TNV - Telecommunication Network Voltage - Voltages exceeding SELV limits but still limited in voltage and current.

Problem Symptoms

There are no product problems or symptoms. This Field Notice is being used as an advisory to alert customers that a new warning is being placed in the Hardware Installation Guides for products with in-line power devices. To view the revised document, follow the link below and select to view the revised hardware installation guide for the product:

Workaround/Solution

The Hardware Installation Guides now include the following warning:

Warning: Voltages that present a shock hazard may exist on in-line power circuits if interconnections are made using uninsulated exposed metal contacts, conductors or terminals. Avoid using such interconnection methods, unless the exposed metal parts are located within a restricted access location and users and service people who are authorized within the restricted access location are made aware of the hazard. A restricted access area can be accessed only through the use of a special tool, lock and key or other means of security. This warning should be provided to all technical and maintenance technicians and included in the training curriculum for technical and maintenance technicians. Also, Cisco recommends that users with in-line power place this warning at areas where punch down or terminal blocks are installed.

For Additional Information

For more information go to the following documents

Catalyst 3524

Catalyst 3550

Catalyst 4000

Catalyst 4500

Catalyst 6500

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods: