Protective devices

Protective devices

Protective devices do not prevent access or entry into the machine's danger zone, but safely shut down the hazardous movements when the protective device is activated. Such protective devices may include, for example, light barriers, light curtains, scanners, pressure-sensitive mats or two-hand control devices.

Protection against unexpected start-up/restart of a machine

Two-hand control devices prevent injuries to hands or other body parts. The machine function/control command can only be triggered by using both hands, which are in a safe position during this operation.


Standards for protective devices

Standard Title
EN IEC 61496-1

Safety of machinery
Electrosensitive protective equipment - Part 1:
General requirements and tests

EN IEC 61496-2

Safety of machinery
Electrosensitive protective equipment - Part 2:
Particular requirements for equipment using active opto-electronic protective devices

EN IEC 61496-3

Safety of machinery
Electrosensitive protective equipment - Part 3:
Particular requirements for active opto-electronic protective devices responsive to diffuse reflection (AOPDDR)

EN ISO 13855

Safety of machinery
Positioning of safeguards with respect to the approach speeds of parts of the human body

EN ISO 13851

Safety of machinery
Two-hand control devices - Principles for design and selection

EN ISO 13856-1/-2/-3

Safety of machinery - Pressure-sensitive protective devices
General principles for design and testing of
Part 1: Pressure-sensitive mats and pressure-sensitive floors
Part 2: Pressure-sensitive edges and pressure-sensitive bars
Part 3: Pressure sensitive bumpers, plates, wires and similar devices


Would you like further information? Read more in Chapter 4.3! The Safety Compendium contains the latest knowledge on machinery safety.

Safety Compendium

Pilz South East Asia Pte. Ltd.
25 International Business Park, #04-56 German Centre
Singapore 609916

Telephone: +65 6839 292-0

Technical Support

Telephone: +65 6829 2920

Was this article helpful?