D4A-2918N Omron, D4A-2918N Datasheet - Page 14

• Manufacturer Part Number: D4A-2918N
• Description: Basic / Snap Action / Limit Switches LIMIT SWITCH
• Manufacturer: Omron
• Type: General Purpose Limit Switchr

Specifications of D4A-2918N

• Contact Form: DPDT
• Contact Rating: 6 Amps at 24 Volts
• Actuator: Roller
• Operating Force: 3.5 lb
• Termination Style: Screw
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Safety Precautions
Refer to Safety Precautions for All Limit Switches.
Operating Environment
Changing the Operating Direction
Roller Lever Switch
The head of the side rotary type can be converted in seconds to CW,
CCW, or both-way operation. Follow the procedures on the right hand
side for conversion (not applicable to the Maintained, Sequential
Operating, Center Neutral Operating Switches).
• Seal material may deteriorate if a Switch is used outdoor or where
• Install Switches where they will not be directly subject to cutting
• Constantly subjecting a Switch to vibration or shock can result in
• The Switches have physical contacts. Using them in environments
Operating Part (Rear of Head)
subject to special cutting oils, solvents, or chemicals. Always
appraise performance under actual application conditions and set
suitable maintenance and replacement periods.
chips, dust, or dirt. The Actuator and Switch must also be protected
from the accumulation of cutting chips or sludge.
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.
containing silicon gas will result in the formation of silicon oxide
(SiO
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.
Not Suitable
2
Operating position arrow marks
) due to arc energy. If silicon oxide accumulates on the
Precautions for Correct Use
1. Dismount the head by loosening the
2. Turn over the head to set the desired
3. When set to the CW position, the
four screws that secure it.
operation (CW, CCW, or both). The
desired side can be selected by set-
ting the mode selector knob shown in
the figure. This knob is factory set to
the “CW+CCW” (both-way operation)
position.
head rotates in clockwise direction.
When set to the CCW position, the
head rotates in counterclockwise di-
rection.
In either case, be sure to accurately
align the arrow mark to the setting po-
sition.
Suitable
Procedures
Lighting Mode Selection of Indicators (SPDT only)
The lighting mode of the operation indicator can be changed easily
between two modes: lighting when the Switch is operating and
lighting when the Switch is not operating.
*1. The lamp is lit when the actuator is at the free position.
*2. The lamp is lit when the contacts have been released and snapped only from
Change the lighting mode as follows:
1. Push the claw securing
In either case, the lamp will not light when the load is ON.
Mounting
Model
Front
Mounting
Rear
Mounting
the lamp section to the
right (do not push
strongly).
Lights When Not Operating *1
The lamp will be off when the contacts of the Limit Switch have been
actuated and snapped to each other at the operating position.
the operating position.
1
4
Built-in switch
Power supply
29.4 ± 0.15
29.4 ± 0.15
Internal circuits
3
2
2. Remove the lamp
Load
G1/2 Conduit
D4A-3@@@N
D4A-4@@@N
section.
59.5 ± 0.15
59.5 ± 0.15
Two, 6.2
(Recommended mounting
screws: M6.
Switch Box depth: 10.)
Two, 5.2
or M5 tapped holes
Lights When Operating *2
+0.2
0
+0.2
4
1
0
dia. holes
dia. holes
Built-in switch
Internal circuits
3. Mount the lamp section
Power supply
so that legend “NC-ON”
or “NO-ON” will appear
in the display window.
D4A-@N
Mounting lo-
3
2
: Mounting
: Mounting
cations
locations
locations
Load
14