QDE-825D BANNER ENGINEERING, QDE-825D Datasheet - Page 24

• Manufacturer Part Number: QDE-825D
• Description: Safety Light Curtain
• Manufacturer: BANNER ENGINEERING

Specifications of QDE-825D

• Light Curtain Type: Safety
• Accessory Type: Machine Interface Cable
• For Use With: EZ-Screen Safety Light Screen

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22
NOTES:
1. The OSHA-recommended hand speed constant K has
2. Ts is usually measured by a stop-time measuring device.
The formula used for U.S. applications (other standards may
apply) to calculate separation distance is:
where:
Ds – the separation distance, in mm (inches);
K –
Ts – the overall stop time of the machine (in seconds) from
Tr – the maximum response time, in seconds, of the
Dpf – the added distance due to depth penetration factor as
been determined by various studies, and although these
studies indicate speeds of 63"/second to more than 100"/
second, they are not conclusive determinations. Consider all
factors, including the physical ability of the operator, when
determining the value of K to be used.
If the machine manufacturer’s specified stop time is used,
at least 20% should be added to allow for possible clutch/
brake system deterioration. This measurement must take
into account the slower of the two MPCE channels, and the
response time of all devices or controls that react to stop the
machine. See Notice Regarding MPCEs. If all devices are
not included, the calculated separation distance (Ds) will
be too short and serious injury could result.
Reduced Resolution increases Dpf (see values in table). Increase
the depth penetration factor to calculate the proper separation
distance whenever Reduced Resolution is used. Always turn
Reduced Resolution OFF when the larger minimum object detection
size is not required.
P/N 133487
P/N 112852 rev. F
Installation and Alignment
OFF
ON
Resolution
Overview
Reduced
WARNING . . .
Using Reduced Resolution
1600 mm per second (or 63" per second), the
OSHA1910.217, ANSI B11, ANSI/RIA R15.06
recommended hand-speed constant (See Note 1);
the initial “stop” signal to the final ceasing of all motion,
including stop times of all relevant control elements
(e.g., IM-T-.. Interface Modules) and measured at
maximum machine velocity (See Note 2 and Warning at
right).
EZ-SCREEN emitter/receiver pair (see Section 2.1 for
SLS.. models and Section 7.5 for SLSC.. models); and
prescribed in OSHA1910.217, ANSI B11, ANSI/RIA
R15.06 for U.S. applications (See Caution below):
Ds = K x (Ts + Tr) + Dpf
24 mm (1")
78 mm (3")
14 mm Systems
Depth Penetration Factor (Dpf)
Proper Installation When
78 mm (3")
180 mm (7")
30 mm Systems
Figure 3-2. Separation Distance (Ds) calculation example
Stop time (Ts) must include the response time of all devices
or controls that react to stop the machine. If all devices are
not included, the calculated safety distance (Ds) will be too short.
This can lead to serious bodily injury or death. Be sure to include
the stop time of all relevant devices and controls in your
calculations.
This example shows how to use the formula at left to
calculate separation (safety) distance (Ds). These numbers
will be used for the variables in the formula:
Our example uses a 600 mm system with 14 mm resolution
and Reduced Resolution ON, so Dpf is 3". Response time
for this example is 0.023 second.
Sub sti tute the numbers into the for mu la as fol lows:
In this example, the EZ-SCREEN emit ter and re ceiv er
must be mount ed so that no part of the defined area will be
closer than 24.6" to the closest reachable hazard point on
the guarded ma chine.
Each of the two Machine Primary Control Elements
(MPCE1 and MPCE2) must be capable of immediately
stopping the dangerous machine motion, irrespective
of the state of the other. These two channels of
machine control need not be identical, but the stop time
performance of the machine (Ts, used to calculate the
separation distance) must take into account the slower
of the two channels (see Section 3.5.3).
WARNING . . .
K = 63" per second (the hand speed constant set
Ts = 0.32 (0.250 second is specified by the machine
Tr = 0.023 second (the spec i fied response time of
Ds = K x ( Ts + Tr ) + Dpf
Ds = 63 x (0.32 + 0.023) + 3 = 24.6"
by OSHA)
manufacturer; plus 20% safety factor; plus
20 ms for interface module IM-T-9A response)
an SLSP14-600 EZ-SCREEN System)
Notice Regarding MPCEs
Banner Engineering Corp.
Banner Engineering Corp.
www.bannerengineering.com • Tel: [phone]
www.bannerengineering.com • Tel: [phone]
Determine Correct Stop Time
Instruction Manual
•
•
Minneapolis, U.S.A.
Minneapolis, U.S.A.
EZ-SCREEN