Dpf values from Osha O-10 Table | Honeywell FF-SNC specs

■Safety Distance Calculations per EN 294 European standard

The dimensions of openings correspond to the narrowest dimension of a slot opening (for openings greater than 120 mm / 4.72 in, refer to the EN 294 standard).

Safety distances sr for regular openings for persons of 14 years of age and above:

Part of body	Illustration	Opening size			Safety distance sr

					Slot


Fingertip			e ≤ 4			≥ 2
		4	< e ≤	6	≥	10


Finger up to knuckle joint		6	< e ≤	8	≥	20
		8 < e ≤		10	≥	80
Or
Or		10	< e ≤	12	≥	100
		12	< e ≤	20	≥	120
hand
hand		20	< e ≤	30	≥	850*

Arm up to junction with shoulder		30	< e ≤	40	≥	850

		40 < e ≤		120	≥	850

*If the length of the slot opening is ≤ 65 mm / 2.56 in, the thumb will act as a stop and the safety distance can be reduced to 200 mm / 7.88 in).

For more information on the guards installation, refer to the European standards: EN 811, EN 953, EN 294

■Safety Distance Calculations per US ANSI / OSHA standard

Ds = K(Ts + Tc + Tr ) + Dpf

With:

Ds = minimum safe distance between safeguarding device and hazard

K = speed constant: 1,6 m/sec (63 in/sec) minimum based on the movement being the hand/arm only and the body being stationary (a greater value may be required in specific applications and when body motion must also be considered)

Ts = worst stopping time of the machine/equipment Tc = worst stopping time of the control system

Tr = response time of the safeguarding device including its interface (Tr for interlocked barrier may include a delay due to actuation. This delay may result in Tr being a deduct– negative value).

Dpf = the “Depth penetration factor” is the maximum travel towards the hazard if the guard can be opened a certain width or amount before a stop is signaled.