Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 20)

page 20
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Installation and Alignment
EZ-SCREEN Grid
Instruction Manual
U.S. Applications:
Using the formula,
Ds = K x (Ts + Tr) + Dpf
separation distance for a model SG..3-533 EZ-SCREEN Grid System
(42" protected height with 3 beams, 21" apart) 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 Grid System
in seconds; and
Dpf = 36"
Ds = 63 x (0.32 + 0.024) + 36
Ds = 58"
In this example, the EZ-SCREEN Grid emitter and receiver must be mounted
so that no part of the light grid will be closer than 58" from the closest
reachable hazard point of the guarded machine.
European Applications:
Using the same formula, separation distance for a model SG..3-400 EZ-
SCREEN Grid System (800 mm protected height with 3 beams, 400 mm
apart), 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 Grid System
in seconds; and
Dpf = 850 mm
Ds = 1600 x (0.32 + 0.024) + 850
Ds = 1400 mm
In this example, the EZ-SCREEN Grid 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 3-3. 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 and receiver 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 3.3.2.
!
CAUTION . . .
Adequate Separation
Distance
The emitter and receiver must be
positioned a safe distance from
hazardous areas, as described by
OSHA standards in Section
1910.217 (c)(3)(iii)(e). Also see
Section 3.3 of this manual.
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.
!