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Nomenclature
J D4DH-jjBC
Guard Closed
Guard Open
Cam
Forced
separation
of NC con-
tacts
When
opening
the guard
When the guard is opened, the cam that is directly coupled
to the shaft rotates to press the Switch in the direction
shown by the arrow. This action separates the contacts to
stop the machine.
Built-in Switch
The built-in switch has a positive
opening mechanism that forcibly
separates the NC contact.
Models with a 1NC contact and 1NO
contact or 2NC contacts are available.
Cover
The cover, with a hinge on its lower part,
can be opened by removing the screw of
the cover, which ensures ease of
maintenance and wiring.
* The housing and head of the D4DH are made of resin. Use D4BS Miniature
Electromagnetic Lock Safety Door Limit Switches for applications requiring
safety door switches of tough, high-sealing, or oil-resistant construction.
Operation
J CONTACT FORM
Model
Contact
D4DH-j5jj
1NC/1NO
D4DH-jAjj
2NC
Note: Terminals are numbered according to EN50013. Contact forms are according to EN60947-5-1.
J POSITIVE OPENING MECHANISM
1NC/1NO Contact (Slow-Action)
Contact spring
Reset spring
All models have slow-action contacts with approved
positive opening mechanisms on the NC contacts, thus
forcibly separating the NC contacts even if they weld.
(Meets the requirements of EN60947-5-1.)
Contact form
Diagram
Closed
Closed
Fixed contact on NC side
Movable contact
Fixed contact on NO side
Plunger
Arm Lever
The arm lever is mounted upwards in the center
position before shipping. To change the position,
loosen the arm lever mounting screw, dismount
the arm lever, and mount the arm lever in the left
or right position.
The joint between the shaft and arm lever is
formed with form-lock construction which remains
secure even when the screw becomes loose.
Arm lever and shaft are made of stainless steel.
Head
The head can be mounted in four directions.
Conduit
A wide variety of
conduits is available.
Remarks
Only NC contact 11-12 has an approved
(7°)
positive opening mechanism.
ON
The minimum positive opening travel is 45°.
(19°)
Travel
They can be used as unlike poles.
Open
NC contacts 11-12 and 21-22 have an approved
(7°)
positive opening mechanism.
ON
The minimum positive opening travel is 45°.
Travel
They can be used as unlike poles.
Open
2NC Contact (Slow-Action)
Contact spring
Reset spring
All models have slow-action contacts with approved
positive opening mechanisms on the NC contacts, thus
forcibly separating the NC contacts even if they weld.
(Meets the requirements of EN60947-5-1.)
5
D4DH
Size
1-Conduit
2-Conduit
Pg13.5
Yes
Yes
1
G
/
Yes
Yes
2
1
/
-14NPT
Yes
---
2
Fixed contact on NC side
Movable contact
Plunger
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