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ISO 13849-1:2023 IEC 62061:2021 ISO 13855:2010 ANSI B11.19:2019 ANSI B11.0:2020 ISO 12100:2010 R15.306-2016 ISO 10218-1/2

Approach direction

ISO 13855:2010 §5 — K = 2000 mm/s (orthogonal) · 1600 mm/s (parallel)

Device type & beam configuration

Device type Determines D_DS reaching distance and installation rules

Number of beams Affects reaching distance per ISO 13855 Annex C

Distance inputs

Machine stopping time T (ms) Total stop time from signal to hazard cessation

Device response time Tr (ms) Light curtain response time from manufacturer datasheet

Detection capability d (mm)

Approach speed K (mm/s) — auto-selected Auto-set by iteration: K=2000 if S≤500mm, K=1600 if S>500mm (ISO 13855 §5.2.2)

D_DT / D_DS reaching distance (mm) — auto-computed Light curtain: 8×(d−14mm) · Light beam ≥2: 850mm · Single beam: 1200mm · Whole-body: 1200mm

Display units

Whole-body access is possible through or around detection zone

If checked → D_DS auto-set to 1200 mm per ISO 13855 §4.3 and ANSI B11.19 §10

Beam installation checks — ISO 13855 Annex C

Enter actual beam installation heights to verify compliance. These are checked but do not affect the distance calculation.

Lowest beam height above floor (mm) Max 300 mm (industrial) or 200 mm (risk-assessment justified)

Highest beam height above floor (mm) Min 900 mm to prevent stepping over detection zone

Beam spacing (mm) Min 400 mm between beams for multi-beam devices

Opening height (mm) — single beam only Single beam: opening must be ≤ 500 mm

Safety Mat / Pressure-Sensitive Protective Device — ISO 13855:2010 §9

Minimum distance from mat edge to hazard zone. Whole-body access is always assumed — C = 1200 mm is mandatory.

Machine stopping time T (ms)

Mat response time Tr (ms) Typically 10–100 ms — verify from manufacturer datasheet

Approach speed K (mm/s) 1600 mm/s walking speed per ISO 13855

Supplemental distance C (mm) Locked at 1200 mm — whole-body always assumed for mats

Mat edge allowance (mm) Additional offset from physical mat edge to sensing zone edge — verify with manufacturer

Display units

⚠ C = 1200 mm is mandatory for safety mats — a person can stand fully on the mat before the machine stops. Do not reduce this value. (ISO 13855:2010 §9, ANSI B11.19:2019 §8.5)

Actuation performance — ISO 13856-1:2013 guidance

The distance calculation does not verify actuation performance. The following must be confirmed from the manufacturer's datasheet and validated against ISO 13856-1.

Minimum actuation force

Mfr. spec — must detect lightest foreseeable person

Non-actuation (tare) load

Mat must NOT trip from tooling, vibration, or process loads

Mat coverage area

Must be large enough that it cannot be stepped over — verify per ISO 13857

ℹ ISO 13856-1 does not set a maximum person weight. The requirement is that the mat actuates reliably under the minimum foreseeable load (e.g., a small or light operator). The non-actuation requirement — that process equipment sitting on the mat does NOT cause a false trip — is a separate engineering consideration verified at installation.

ℹ PLd minimum is required when a safety mat is used as a primary safeguard. Mats used only for presence sensing (restart prevention) may use PLc — confirm via risk assessment. Reference: ISO 13849-1:2023, IEC 62061:2021.

Ref: ISO 13856-1:2013 (pressure-sensitive protective devices) · ISO 13855:2010 §9 · ANSI B11.19:2019 §8.5 · ISO 13849-1:2023

Risk Graph Parameters — ISO 13849-1:2023 Annex A

Select parameters to determine required Performance Level ()

Severity of injury (S)

Frequency / exposure (F)

Possibility of avoidance (P)

Standard framework

MTTFd / DC / PFHd Calculator — ISO 13849-1:2023 Annex K

Quantify channel reliability for performance level verification

Architecture category

MTTFd Channel 1 (years) Max 100 years per ISO 13849-1 §4.5.2

MTTFd Channel 2 (years) For Category 3/4 (dual channel)

Diagnostic coverage DCavg (%)

CCF score Per ISO 13849-1 Annex F checklist

Select hazard type to get device recommendations

Hazard type

Required PLr / SIL

⚠ For reference only. Results must be reviewed and validated by a competent person per ISO 12100:2010. Vector Safety LLC assumes no liability for decisions made based on this tool.

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IEC 61800-5-2 Safety functions reference ▼ show

For reference only. All assessments must be reviewed by a qualified Functional Safety Engineer. Vector Safety LLC assumes no liability.

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Machine Safety AI Advisor

Ask about ISO 13849, IEC 62061, ANSI B11, safe distances, risk assessment, or device selection.

Hello! I'm your Machine Safety Expert advisor for Vector Safety LLC. I'm trained on ISO 13849, IEC 62061, ISO 13855, and ANSI B11 standards. Ask me about performance levels, safe distance calculations, risk assessment methodology, safety device selection, or any other machine safety topic. How can I help you today?

Responses are for informational guidance only. All safety designs must be validated by a qualified FSE. No standard text is reproduced.

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