14 Rockwell Automation Publication 442G-UM001B-EN-P - May 2016
Chapter 2 Safety Concept
The Access Box must be installed in accordance with the applicable regulation
and standards.
While the Access Box can be used for PLe and Category 4 applications, the
installer must comply with guard requirements (for example, EN/ISO13854
and EN/ISO 13857) and in some cases also minimum (safe) distance
requirements (for example, EN/ISO 13855).
The installed system, including the safety control system and the means by
which the machine stops, must achieve the needed safety performance. The
Access Box is one element in the safety system.
Before safety components are used, a risk assessment must be performed on the
machine in accordance with:
• EN ISO 13849-1, Safety of machinery. Safety related parts of control
systems. General principles for design, Annex B
• EN ISO 12100, Safety of machinery – Basic concepts - General
principles for design - Risk assessment and risk reduction.
Correct use includes compliance with the relevant requirements for
installation and operation, in particular
• EN ISO 13849-1, Safety of machinery. Safety related parts of control
systems. General principles for design
• EN ISO 14119, Safety of machinery. Interlocking devices that are
associated with guards. Principles for design and selection
• EN 60204-1, Safety of machinery. Electrical equipment of machines.
General requirements.
Additional guidance on guards, guard locking and guard interlocking is found
in:
• EN/ISO 12100 Safety of machinery—General principles for design—
Risk assessment and risk reduction
• EN/ISO 13855 Safety of machinery—Positioning of safeguards
concerning the approach speeds of parts of the human body
• EN/ISO 13857 Safety of machinery—Safety distances to prevent
hazard zones from being reached by upper and lower limbs
• EN/ISO TR 24119 Technical report that is associated with EN ISO
14119 addressing the logical serial connection of interlocking devices
• EN/ISO 14120 General requirements for the design and construction
of guards
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