7

D4CC

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.

Mounting

• Make sure that the plate to which the

D4CC is mounted is flat. If the plate is

warped or has protruding parts, the

D4CC may not malfunction.

• A maximum of 6 Switches may be

group-mounted. In this case, pay attention to the mounting direction so that

the convex part of the group-mounting guide on one Switch fits into the

concave part of the guide on the other Switch as shown in the figure below.

For group mounting, the mounting panel must have a thickness (t) of 6 mm

min.

• Be sure to tighten each screw to the proper tightening torque as shown in the table.

* By removing the two screws from the head, the head

direction can be rotated 180

°. After changing the head

direction, re-tighten to the torque specified above. Be

careful not to allow any foreign substance to enter the

Switch.

Operation

• Operation method, shapes of cam and dog, operating frequency,

and overtravel have a significant effect on the service life and

precision of a Limit Switch. For this reason, the dog angle must be

30

° max., the surface roughness of the dog must be 6.3S min. and

hardness must be Hv400 to 500.

• To allow the plunger-type actuator to travel properly, adjust the dog

and cam to the proper setting positions. The proper position is

where the plunger groove fits the bushing top.

• To allow the roller lever-type actuator to

travel properly, adjust the dog and cam so

that the arrow head is positioned between

the two convex markers as shown below.

• Properly adjust the stroke of the center

roller lever along with the dog or cam so

that the concave part (A) of the head is

located between the convex parts of the

head as shown below when the center

roller lever is pressed by the dog or cam.

• Refer to the following to adjust the stroke of

the lever based on the mounting hole level.

Precautions for Correct Use

No.

Type

Appropriate tightening torque *

(1)

M5 Allen-head bolt

4.90 to 5.88 N·m

(2)

M3.5 head mounting screw

0.78 to 0.88 N·m

(3)

M5 Allen-head bolt

4.90 to 5.88 N·m

Not Suitable

Suitable

Two, 5.2-dia. or

M5 screw holes

25±0.1

Mounting Holes

Mounting plate

16 mm

t

Group-mounting

guide

(Front: convex

Rear: concave)

Group Mounting

(3)

(2)

(1)

Bushing top

Dog

Groove

2.8 mm

Arrow head

Convex

marker

Proper

range

A

Proper

range

A

Convex parts of head

Proper

range

Proper

range

Proper range

Proper range

44.9

(Total Travel Position)

65.3 to 64.6

(Operating Position)