ISO/IEC TR 14762:2001 PDF

This technical report gives guidelines for functional safety of electrically-controlled devices intended to be integrated in a home control system (HCS), as defined in IEC Guide 110. These guidelines also apply to similar equipment having home and/or building control functions. Any reference to HCS includes similar equipment, such as sensors and activators for security and energy management.

User environment

This technical report is concerned with the safety of persons, surroundings, livestock and domestic animals. It includes personal protection against electric shock, effects of excessive temperature, radiation, explosion, implosion, mechanical stability and moving parts, as well as protection against fire. It covers safety both in homes and non-industrial buildings. (See IEC Guide 104.)

This technical report specifies requirements intended to ensure safety for the user and layperson who may come into contact with the equipment and, where specifically stated, for service personnel (see clause 1 of IEC 60950).

An HCS should comply with the requirements for functional safety indicated in this report. In addition, the individual equipment integrated into an HCS should comply with relevant product safety standards.

Hazards

Application of this technical report is intended to prevent injury or damage due to any of the following hazards that could result from malfunction or failure of an HCS:

• electric shocks;
• energy hazards;
• fire;
• mechanical and heat hazards;
• radiation hazards;
• chemical hazards.

Included is safety in homes and non-industrial buildings for persons, surroundings, livestock and domestic animals.

Conditions

This technical report covers all conditions of normal use and fault conditions.

Foreseeable misuse should be taken into consideration; however, sabotage, force majeure and intentional damage are excluded.

After abnormal operation or in a fault condition, a device should not interfere with the safety of the HCS and should remain safe for the user as defined in the relevant product safety standard. It is not required that the device should still be in full working order.

Possible protection measures

The following measures are suggested:

• measures to prevent an HCS from interfering with the safety of a device connected to the HCS;
• measures to ensure that a malfunction or a failure of an HCS does not impair the safety level of devices integrated into the system;
• measures to prevent a device integrated into an HCS from interfering with the safety of the HCS, or other devices connected to the HCS.

Some examples of such measures are

• appropriate installation of a device,
• adequate electrical safety of interface modules,
• control of HCS access,
• verification of safety critical information,
• safe mode of a device in the event of a malfunction or a failure of the HCS.

Relevant information should be given within installation or operation manuals (or instruction sheets).