Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 21)

P/N 68413 rev. A
19
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
EZ-SCREEN Point
Instruction Manual
System Installation
U.S. Applications:
Using the formula,
Ds = K
x
(Ts + Tr) + Dpf
Ds = separation distance for an ACCESS-GUARD System (top beam at 36" and
bottom beam at 12" above the floor) is calculated (per ANSI/RIA R15.06):
K = 63"/second
Ts = 0.32 (0.250 second is specified by the machine manufacturer; plus 20%
safety factor; plus 20 ms for interface module IM-T-9A response)
Tr = 0.024, the maximum response time of the EZ-SCREEN Point System in
seconds; and
Dpf = 48"
Ds = 63
x
(0.32 + 0.024) + 48 Ds = 70"
In this example, the EZ-SCREEN Point emitter and receiver must be mounted so that
no part of the light grid will be closer than 70" from the closest reachable hazard point
of the guarded machine .
European Applications:
Using the same formula, separation distance for an ACCESS-GUARD System (top
beam at 900 mm and bottom beam at 400 mm above the floor), is calculated
(per EN 999):
K = 1600 mm/second
Ts = 0.32 (0.250 second is specified by the machine manufacturer; plus 20%
safety factor; plus 20 ms for interface module IM-T-9A response)
Tr = 0.024, the maximum response time of the EZ-SCREEN Point System in
seconds; and
Dpf = 850 mm
Ds = 1600
x
(0.32 + 0.024) + 850 Ds = 1400 mm
In this example, the EZ-SCREEN Point emitter and receiver must be mounted so
that no part of the light grid will be closer than 1400 mm from the closest reachable
hazard point of the guarded machine .
Figure 3-6. Calculating separation distance, two examples
NOTE: Other machine standards may require different separation factors
from those illustrated. Also, workers’/operators’ abilities, plant
procedures and other factors may affect Ds.
CAUTION . . .
Position Components
Carefully
The emitter(s) and receiver(s) must be
positioned so that the hazard cannot
be accessed by reaching over, under,
around or through the sensing field.
Supplemental safeguarding may be
required; see Section 3.3.3.
CAUTION . . .
Adequate Separation
Distance
The emitter(s) and receiver(s) must
be positioned a safe distance from
hazardous areas, as described by
OSHA standards in Section 1910.217
(c)(3)(iii)(e).
Failure to do so could result in serious
bodily injury or death.
CAUTION . . .
Determining Correct
Stop Time
Be sure to include the stop time of all
relevant devices and controls in your
calculations.
Failure to do so could result in serious
bodily injury or death.