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SHL-W55 Datasheet(PDF) 7 Page - Omron Electronics LLC

Part # SHL-W55
Description  Compact, General-purpose Horizontal Switches
Download  8 Pages
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Manufacturer  OMRON [Omron Electronics LLC]
Direct Link  http://www.omron.com/index3.html
Logo OMRON - Omron Electronics LLC

SHL-W55 Datasheet(HTML) 7 Page - Omron Electronics LLC

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7
SHL
Safety Precautions
Refer to Safety Precautions for All Limit Switches.
Operating Environment
• Seal material may deteriorate if a Switch is used outdoor or where
subject to special cutting oils, solvents, or chemicals. Always
appraise performance under actual application conditions and set
suitable maintenance and replacement periods.
• Install Switches where they will not be directly subject to cutting
chips, dust, or dirt. The Actuator and Switch must also be protected
from the accumulation of cutting chips or sludge.
• Constantly subjecting a Switch to vibration or shock can result in
wear, which can lead to contact interference with contacts,
operation failure, reduced durability, and other problems.
Excessive vibration or shock can lead to false contact operation or
damage. Install Switches in locations not subject to shock and
vibration and in orientations that will not produce resonance.
• The Switches have physical contacts. Using them in environments
containing silicon gas will result in the formation of silicon oxide
(SiO2) due to arc energy. If silicon oxide accumulates on the
contacts, contact interference can occur. If silicon oil, silicon filling
agents, silicon cables, or other silicon products are present near the
Switch, suppress arcing with contact protective circuits (surge
killers) or remove the source of silicon gas.
Connections
Be sure to connect a fuse with a breaking current 1.5 to 2 times the
rated current to the Limit Switch in series in order to protect the Limit
Switch from damage due to short-circuiting.
When using the Limit Switch under the EN ratings, use a gI or gG 10-
A fuse that conforms to IEC60269.
Mounting
• Secure the Switch with two M4 screws and washers.
The tightening torque applied to each terminal must be 1.18 to
1.37 N·m. Tighten the screws to the specified torque. An excessive
tightening torque may damage the Switch and cause a malfunction.
• When mounting the panel mount-type Switch with screws on a side
surface, remove the hexagonal nuts from the actuator.
Mounting Holes
• When mounting the panel mount type (SHL-Q55, SHL-Q2255, or
SHL-Q2155) on a panel, tighten the hexagonal nuts of the actuator
to a torque less than 4.90 to 7.84 N·m.
Mounting Holes
Micro Load Models
When using a Limit Switch for opening or closing micro-load circuit
(zones 1 through 3), contact failure may occur if a Limit Switch with
ordinary contact specifications is used. Therefore, when using Limit
Switches in the micro-load range, use ones with contact
specifications that are suited to each zone. Use the SHL-
@-01 micro
load models within the zones (1 through 3) shown in the following
diagram.
Micro Load Applicable Ranges
The above diagram is for standard conditions (+5
°C to +35°C, 40% to
70%RH). Since the values vary depending on the operating
environment conditions, contact your OMRON representative for
further details.
Tightening Torque
• A loose screw may result in a malfunction. Be sure to tighten each
screw to the proper tightening torque as shown below.
• When wiring, use M3 round solderless terminals and apply
insulation shielding to the connections. Tighten the terminals
screws to 0.24 to 0.44 N·m.
Operating Stroke
Ensure that the operating stroke for roller plunger models is within
the set position display.
Others
The standard seal rubber for the lead wire outlet is one that allows 6-
to 8-dia. cables. The appropriate nominal cross-section of the lead
wire is 0.75 mm2. (When the sealing capability is required over a long
period of time, use mold specifications.)
Precautions for Correct Use
Not Suitable
Suitable
16.5
± 0.2
Two, 4.3-dia. or
M4 screw holes
14.5
+0.2
0
dia.
No.
Type
Appropriate tightening
torque
1
Terminal screw (M3 screw)
0.24 to 0.44 N·m
2
Mounting screw
(M4 screw)
1.18 to 1.37 N·m
30
24
12
5
0
1
10
100
1,000
Current (mA)
0.1
1 mA
Operating
range for
standard
models
Operating range for
micro-load models
26 mA
0.16 mA
800 mW
5 mW
100 mA 160 mA
Unusable
range
Operating stroke
range
Reference


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