Fiessler ESPE Type 4, Руководство по эксплуатации

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7.1 Muting
(Bridging unit) for the short-term bridging of a safety light barrier during a material
movement into and out of a manufacturing cell and/or for the safe differentiation
between a human operator and fork-lift truck (Fig. 21/1).
Application: The NSUW N1 Muting switchgear is used if a safety light barrier needs
to be bridged or differentiate between man and material flow for a certain period of
time during an operating cycle, e.g. for protection against bending machines,
palletizing machines, narrow-passage high-bay storage, certain types of presses.
Functional description: In combination with a vertical ULVT safety light barrier and
four muting sensors, the LSUW N1 Muting switchgear enables a differentiation
between man and material flow to be made.
Fig. 21/1 Muting application example
For the muting functions, the following components are required and can be obtained
from us:
1. LSUW N1 Muting K switchgear
2. Safety light barrier, e.g. ULVT 900
3. Four muting sensors, e.g. light barriers, inductive sensors, camshaft controller.
4. Muting lamp (max. 230 V, 60 W, min. 24 V AC or DC max. 0.5 A, min. 50 mA)
In order to prevent the safety light barrier from being constantly bridges through intentional manipulation, a twin-channel time-
out is provided which withdraws the muting function after a configurable time between 3 and 90 seconds. This time is set by
Fiessler Elektronik in accordance with customer specifications. A switching option is also available, whereby operation without
time-out is possible.
The muting lamp, which indicates the bridging status, is monitored. If the muting lamp is connected or is defective,
bridging will not be possible.
Both muting sensor channels must be connected via separate cables in order to rule out a short-circuit. If the muting
sensors require a power supply, the power supplies of the two muting channels must also routed via separate
cables. The connection to the in supply terminals and - terminal strip must be implemented separately.
For application which do not permit the interruption of a hazardous movement, which only the sounding of an alarm,
a key switch must be used as the start button. It must only be possible to remove the key in open status.
The alarm is activated when the mains voltage is applied to this system. The alarm can be deactivated by pressing
the key start button.
Before pressing the key start button, it must be checked whether any person is located within the
hazardous area. The key start button must be installed at a point where the protected area can be seen.
To ensure the error-free function of the bridging, the distance S (Fig. 21/2) must the same or smaller than the
length of the pallet, the fork-lift truck or the reflector band on the conveyor vehicle.
However, the distance S must also be large enough to prevent the simultaneous interruption of the muting
sensors LS 2A and LS 1B / LS 2B by a human operator.
If necessary, the distance H to the accessible area, or distance S, must be enlarged.
FIESSLER
E L E K T R O N I K
21
7 Additional functions with safety switchgears
- Muting
AA
AA
A
A
A
A
AA
AA
Fig. 21/1 Muting application example
LSUW N1 Muting K switchgear
LS 1A / LS 2A LS 1B / LS 2B
LSUW N1
A
Palette
S
LS 1A / LS 2A
LS 1B / LS 2B
ULVT
A
S
LSUW
A
LS 1A / LS 2A LS 1B / LS 2B
S
H
Fig 21/2 Distance S must be smaller than the
length of the pallet, the fork-lift truck or the
reflector band
Fig. 21/3 and Fig 21/4 Distance S must be large enough to prevent the simultaneous interruption of the
muting sensors
BA - ULVT
ULVT
We will be happy to provide you with individual advice for planning your
application with muting function. The applications shown here are examples only.