steute RF RW SW868-NET Montage- Und Anschlussanleitung Seite 4

RF RW SW868/915/917/922-NET(-ESD)
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Montage- und Anschlussanleitung / Regalsensor
Mounting and wiring instructions / Rack sensor
English
Use in an Electrostatic Protected Area (EPA) is also possible with clips
if a maximum field strength of E<5.000 V/m to the next ESD-sensitive
component (ESDS) is guaranteed, and if the ESD sensitivity of this
ESDS permits it. A minimum distance of >2.5 cm from the clip to the
next ESDS must be guaranteed
Please note the following mounting instructions:
• Do not use any additional fixing or sticking elements. This includes
sticky pads.
• For configurations with clips: guarantee a minimum distance of
>2.5 cm from the clip to the next ESDS.
• For use in a rack: include rack in the potential equalisation of the
ESD-protected area (EPA).
• For use in conveyor systems with rollers: ensure discharge capacity
through contact with the floor.
Connection
Regarding installation: see section »Correct mounting of rack sensor«.
The arrow marked on the rack sensor shows the direction of actuation.
Electronics
The device must be installed according to the start-up description in
the mounting and wiring instructions of the receiver. To avoid too fast
actuation, there is, by default, a delay time of 1 s when processing one
switching command from transmitter to receiver (if the radio interface
is unoccupied and there are no repeat telegrams). The switching signal
of a transmitter must not be generated in shorter time sequences,
otherwise this signal will be suppressed. The preset delay time of
1 sec can be adjusted from min 125 ms to max. 31.9 sec (see RF RxT
SW868/915/917/922-NET, »Description of interface/Wireless receiver«,
section »StateMessage-Response«, paragraph »RECORD.CYCLE-
TIME«, download from www.steute.co.uk).
The device contains a tilting sensor. Both the processor and the tilting
sensor have a built-in periodic power-saving mode (Sleep-Mode, <30
µA). The device has an LED. When a wireless telegram is sent, the LED
flashes briefly. The LED signalises the angle of the switching point.
See section »Table of functions«.
The response time of the sensor is approx. 500ms.
Design of wireless range
NOTICE
For ideal wireless reception we recommend that a
site survey be performed by steute.
Range is strongly dependent on the site. Since wireless signals involve
electromagnetic waves, the signal becomes attenuated when travelling
from the transmitter to the receiver. This means that both the electri-
cal and the magnetic field strengths decrease, reversely proportional
to the square of the distance between transmitter and receiver (E,H~1/
r²). In addition to this natural limitation, other sources of interference
can also have a detrimental impact on the achievable range: for exam-
ple the signal can be strongly impacted by conductive materials. This
is also true of thin sheeting, such as aluminium laminate on insulation
materials. Metallic parts, e.g. wall reinforcements, metal-sheeted in-
sulation or metallised heat-absorbing glass all reflect electromagnetic
waves. Behind them so-called shadow spots form, where waves still
penetrate, but with far more attenuation than in a free-field area.
Penetration of wireless signals:
Wood, plaster, untreated glass
Bricks, chipboard
Reinforced concrete
Metal, aluminium laminate, water
Typical wireless ranges are:
Sight connection in free field:
Sight connection indoors:
Sight connection in free field (SW922):
Sight connection indoors (SW922):
Sleep mode
When the rack sensor is not actuated, it falls into a permanent sleep
mode with extremely low power consumption. The same thing hap-
pens if the rack sensor is permanently actuated. Only when there is
a change in actuation level is the sleep mode abandoned in order to
process a signal.
Wake-up signal / status monitoring
The wake-up signal enables the sensor status to be monitored, facili-
tating periodic monitoring of sensor availability within the network and
its battery charge. Monitoring is recommended after each complete
processing cycle of the application in question.
The shorter the wake-up signal intervals are, the shorter the battery
life will be.
Also, the shorter the wake-up signal intervals are, the higher the ex-
posure level will be at the wireless interface.
In order to set the wake-up signal: see RF RxT SW868/915/917/922-
NET, »Description of interface/Wireless receiver«, section »StateMes-
sage-Response«, subsection »RECORD.WAKEUP«;
available at www.steute.co.uk.
Incline
The switching angle is preset for a roller conveyor incline of 0° to 6°.
This setting is sufficient for most applications. If the roller conveyor
has an increased incline, the pre-set switching angle can be changed
using a software command. See RF RxT SW868/915/917/922-NET,
»Description of interface/Wireless receiver«, section »StateMes-
sage-Response«, paragraph »RECORD.OFFSET«; available at
www.steute.co.uk.
Batteries
The integrated batteries have the same lifetime as the device itself and
cannot be changed. Before initial start-up and teaching-in of the sen-
sor, activate the device as follows: remove the battery seal. Observe
the maximum ambient temperature!
4 / 16
90...100%
65...95%
10...90%
0...10%
approx. 450 m
approx. 40 m
approx. 150 m
approx. 20 m