This standard provides performance requirements for the design, construction, installation, operation, and maintenance of the risk reduction measures listed below when applied to machines. • inherently safe by design (see clause 7); • engineering controls – guards (see clause 8); • engineering controls – control functions (see clause 9); • engineering controls – devices (see clause 10); • administrative controls (see clause 11). This standard does not provide the requirements for the selection of the risk reduction measure for a particular application.

Table of Contents

Foreword
Application
Effective Date
Harmonization
History
Terminology
Context
1 Scope
2 References
2.1 Normative references
2.2 Informative References
3 Definitions
4 Responsibility
4.1 Supplier responsibilities
4.2 User responsibilities
4.3 Integrator/ modifier I rebuilder responsibilities
4.4 Personnel responsibilities
5 Risk assessment process
6 Risk reduction measures
6.1 General requirements for risk reduction measures
7 Inherently safe by design
7.1 General requirements for inherently safe design measures
7.2 Prevention through design
7.3 Safe-opening safeguarding method
7.4 Safe-location safeguarding method
7.5 Minimum gaps to avoid crushing of parts of the human body
7.6 Maximum gaps to avoid exposure to hazards
8 Engineering controls- guards
8.1 General requirements for guards
8.1.1 Guard design and construction
8.1.2 Guard visibility
8.1.3 Guard Location
8.1.4 Guard operation and maintenance
8.2 Fixed guards
8.3 Movable guards
8.4 Interlocked Guards
8.5 Adjustable guards
8.6 Self-adjusting guards
8.7 Partial guards
8.8 Perimeter guards
8.9 Nip guards
8.10 Shields
9 Engineering controls - control functions
9.1 General requirements for control functions
9.2 Performance of safety functions
9.2.1 General requirements for safety functions
9.2.2 Safety interface (safety relay) modules
9.2.3 Considerations for safety-related application software (SRASW)
9.3 Monitoring functions
 9.3.1 General requirements for monitoring functions
9.3.2 Safe condition (stopping performance) monitoring systems
9.3.3 Speed monitoring function
9.4 Stop functions
9.4.1 Normal stop function
9.4.2 Emergency stop function
9.4.3 Protective stop function
9.5 Safety-related reset
9.5.1 General requirements for reset
9.5.2 Automatic reset
9.5.3 Manual reset
9.6 Safety distance
9.7 Suspension of safety functions
9.7.1 Manual suspension (bypassing)
9.7.2 Muting
9.8 Variable sensing functions
9.8.1 Safety-related sensing field switching
9.8.2 Safety-related sensing field blanking
9.9 Presence-Sensing Device Initiation (PSDI)
9.9.1 General requirements for PSDI
9.9.2 PSDI control logic
9.9.3 PSDI operation
9.9.4 User responsibilities for PSDI
9.10 Perimeter risk reduction measures
9.11 Whole body access
9.11.1 General requirements for whole body access
9.11.2 Control of hazardous energy
9.11.3 Prevent undetected presence of individuals within the safeguarded space
9.11.4 Manual reset
9.11.5 Location of safety-related manual control devices
9.11.6 Inhibit function
9.11.7 Interlock devices capable of internal opening
9.11.8 Initiation warning system
9.12 Span of control
9.12.1 Layout analysis
9.12.2 Level of safety performance
9.12.3 Identification
10 Engineering controls -  devices
10.1 General requirements for devices
10.2 Interlock devices
10.3 Trapped (captive) key systems
10.3.1 General requirements for trapped key systems
10.3.2 Trapped key system design
10.3.3 Trapped key system installation
10.3.4 Trapped key system operation
10.4 Interlock blocking devices
10.5 Movable barrier devices
10.5.1 General requirements for movable barrier devices
10.5.2 Type A movable barrier devices
10.5.3 Type B movable barrier device
10.6 Pull back (pull out) and hold out (restraint) devices
10.6.1 General requirements for pull back and hold out (restraint) devices
10.6.2 Pull back and hold out (restraint) device operation
10.7 Presence-sensing devices
10.7.1 General requirements for presence-sensing devices
10.7.2 Light curtains and single/multiple beam devices
 10.7.3 Area scanning devices
10.7.4 Close proximity point of operation AOPDs
1O.7 .5 Vision-based protective devices
10.7.6 Safety mat devices
10.7.7 Safety edge I bumper devices
10.7.8 Probe detection devices
10.7.9 Radio frequency devices
10.8 Two-hand actuating controls
10.8.1 General requirements for two-hand actuating controls
10.8.2 Two-hand control devices
10.8.3 Two-hand trip devices
10.8.4 Two-hand operating levers
10.9 Single actuating controls
10.9.1 General requirements for single actuating controls
10.9.2 Single control devices
10.9.3 Single trip devices
10.10 Hold-to-run control devices
10.11 Enabling devices
10.12 Emergency stop (E-stop) devices
10.12.1 General requirements for E-stop devices
10.12.2 Pushbutton-type E-stop devices
10.12.3 Rope or cable pull-type E-stop devices
10.12.4 Foot-operated E-stop devices
10.12.5 Rod-operated E-stop devices
10.12.6 Push-bar-operated E-stop devices
10.13 Slide locks
11 Administrative controls
11.1 General requirements for administrative controls
11.2 Awareness means
11.2.1 General requirements for awareness means
11.2.2 Awareness barriers
11.2.3 Awareness signals
11.2.4 Awareness (safety) signs
11.2.5 Awareness (safety) markings
11.3 Information for use (human and organizational)
11.3.1 Instruction manual (handbook)
11.3.2 Safe work procedures
11.3.3 Training
11.3.4 Inspection and maintenance
11.4 Administrative safeguarding methods
11.4.1 Safe-distance safeguarding method
11.4.2 Safe-holding safeguarding method
11.4.3 Other safeguarding methods
11.5 Supervision
11.5.1 Supervision of the workplace
11.5.2 Avoidance of unauthorized changes
11.5.3 Management of change
11.6 Control of hazardous energy
11.6.1 Lockout/ tagout
11.6.2 Alternative methods
11.6.3 Restraint mechanisms
11.7 Tools
11.7.1 Workholding equipment
11.7.2 Hand tools
11.8 Personal Protective Equipment (PPE)
 
LIST of ANNEXES (all Informative)
Annex A-   Guidance  to Understand the ANSI B11 Series of Standards & Technical Reports
Annex B -Hazard List for Risk Reduction Measures
Annex C -  Performance of the Safety Function(s)
Annex D -  Comparison of Physical Barriers
Annex E -  Reaching Distance Considerations for Protective Structures
Annex F - Nip Guards
Annex G -  Considerations for Transparent Guards
Annex H -  Safety Distance Calculations for Engineering Controls - Devices
Annex I -  Reaching Distance Considerations for Engineering Controls - Devices
Annex J -  Measurement & calculation of system performance  to achieve a safe condition
Annex K- Achieving a Safe Condition
Annex L -  Safety Functions for Power Drive Systems
Annex M -  Supplier Information for Time and Distance to Achieve a Safe Condition
Annex N -Awareness Means
Annex O -  Risk Reduction Measures in Use
Annex P -  Cross-Reference Mapping of ANSI B11.19: 2010 vs. 2019
Bibliography of Informatively Referenced International Documents

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