WARNING:
• Properly install the device
• Failure to follow the installation instructions can result in ineffective or non-operation of the
Banner device, which could create an unsafe condition resulting in serious injury or death.
• Follow all installation instructions.
8.5.1 Individual Response Time and Separation Distance
When calculating individual separation distance for each emitter/receiver pair, the pair’s position in the cascade affects its
response time, which then affects its separation distance. This method results in the closest possible separation distance
for each light screen.
Response time depends on how far downstream the light screen is from the machine control. Each light screen position in
the cascade, starting from the first light screen in the cascade, increases the light screen’s response time by 2 ms.
The 14 mm resolution, 300 mm EZ-SCREEN emitter/receiver
pairs each begin with a response time of 15 ms.
The pair in position #1 (connected directly to the machine
control), maintains its 15 ms response time. Response time for
the second pair in the cascade circuit increases by 2 ms, to 17
ms; for the third pair by 4 ms, to 19 ms, and for the fourth pair
by 6 ms, to 21 ms.
The formula used for U.S. applications (other standards may
apply) to calculate separation distance for individual placement
of each emitter/receiver pair in the cascaded system is:
Position #1: Ds = K (Ts + Tr) + Dpf
Position #2: Ds = K (Ts + Tr + 2 ms) + Dpf
Position #3: Ds = K (Ts + Tr + 4 ms) + Dpf
Position #4: Ds = K (Ts + Tr + 6 ms) + Dpf
Use the above formulas in place of the Ds formula in
Calculating the Safety Distance (Minimum Distance)
on page
19 to determine individual separation distance (Ds). This
ensures each sensor pair is located at an adequate distance
from the hazard.
EZ-SCREEN
Position #4
15 + 2 + 2 + 2 = 21
21 ms response
EZ-SCREEN
Position #3
15 + 2 + 2 = 19
19 ms response
EZ-SCREEN
Position #2
15 + 2 = 17
17 ms response
EZ-SCREEN
Position #1
15 ms response
NOTE: Light screens of other
lengths/resolution
will have different
response times.
NOTE: EZ-SCREEN Cascade
Overall System Response
15 + [(4-1) x 2]
15 + 6 = 21
21 ms response
CSSI Response Time = 40 ms + [(4-1) x 2 ms] = 46 ms
Emitters
E-Stop (CSSI input)
Receivers
Machine
Control
EZ-SCREEN
®
14/30 mm Safety Light Screen
68
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