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參數(shù)資料
| 型號(hào)： | D4A-3311N |
| 元件分類： | 開關(guān) |
| 英文描述： | SNAP ACTING/LIMIT SWITCH, SPDT, MOMENTARY, 10A, 14VDC, 6.7mm, PANEL MOUNT |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 945K |
| 代理商： | D4A-3311N |
94
General-purpose Limit Switch
D4A-
@N
Precautions
■ Correct Use
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, opera-
tion 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
(SiO
2) due to arc energy. If silicon oxide accumulates on the con-
tacts, 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.
Mounting
Tightening Torque
To maintain the high sealing capability of the Limit Switch, tighten the
screws for the head and switch box with the following torques:
Head (four 12-mm M4 screws): 1.2 to 1.4 Nm
Switch box (two 20-mm M5 screws): 2.4 to 2.7 Nm
Solderless Terminals
The D4A-
@N with DPDT double-break incorporates solderless
terminals.
Operation
The operating methods, cam and dog shapes, operating frequency,
and overtravel (OT) have a significant effect on the service life and
accuracy of the Limit Switch. The shape of the cam should be as
smooth as possible.
A marginal overtravel (OT) value should be set. The ideal value is the
rated OT value x 0.7.
The actuator should not be remodeled to change the operating
position.
Connectors
To satisfy IP67, apply sealing tape to the connector conduit.
Appropriate outer diameter of cables is 5.5 to 14 dia.
Use OMRON’s SC-
@M Series.
Tighten the Connectors to a torque of 1.8 to 2.2 Nm.
Maintenance and Repair
The user must not maintain or repair equipment incorporating any
D4A-N model. Contact the manufacturer of the equipment for any
maintenance or repairs required.
Tightening Torque
A loose screw may cause malfunctions. Be sure to tighten each
screw to the proper tightening torque as shown in the table.
Model
1/2-14NPT Conduit
D4A-1
@@@N
D4A-2
@@@N
Front Mounting
Rear Mounting
(Rear View)
Not Suitable
Suitable
59.5
±0.15
29.4
±0.15
0
Two, 5.2
+0.2 dia. holes
or M5 tapped holes
59.5
±0.15
29.4
±0.15
0
Two, 6.2
+0.2 dia. holes
(Recommended mount-
ing screws: M6.
Switch Box depth: 10.)
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相關(guān)代理商/技術(shù)參數(shù) |
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