G-210
Safety Sensors / Components
Structure, Names, and Functions
Structure (D4NH-
@@
BC)
Contact Form
Note: 1.
Terminals are numbered according to EN50013. Contact forms are according to EN60947-5-1.
2.
MBB (Make Before Break) contacts have an overlapping structure, so that before the normally closed contact (NC) opens, the normally
open contact (NO) closes.
Model
Contact
Contact form
Operating pattern
Remarks
D4NH-
@
A
@
1NC/1NO
D4NH-
@
B
@
2NC
D4NH-
@
C
@
2NC/1NO
D4NH-
@
D
@
3NC
D4NH-
@
E
@
1NC/1NO MBB
D4NH-
@
F
@
2NC/1NO MBB
Pg13.5
G1/2
1/2-14NPT
M20
M12 Connector
Note:
M12 connector types are not available for
Switches with three contacts.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
---
Arm Lever
Conduit
Size
1-conduit
2-conduit
Built-in Switch
Cover
Guard Closed
Guard Open
Head
The head can be mounted in four directions.
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 (vertical) arrow. This action separates the contacts to stop
the machine.
The built-in switch has a direct opening mechanism
that forcibly separates the NC contact even when
there is contact deposit.
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 D4NH 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.
A wide variety of conduits is available.
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.
Cam
The joint between the shaft and
arm lever is formed with form-
lock construction which remains
secure even when the
screw becomes loose.
▲
11
33
12
34
Zb
ON
Stroke
11-12
33-34
Only NC contacts 11-12 have an
approved direct opening
mechanism.
The terminals 11-12 and 33-34
can be used as unlike poles.
11
31
12
32
Zb
ON
Stroke
11-12
31-32
Only NC contacts 11-12 and
31-32 have an approved
direct opening mechanism.
The terminals 11-12 and 31-32
can be used as unlike poles.
33
34
11
21
12
22
Zb
ON
Stroke
21-22
33-34
11-12
Only NC contacts 11-12 and
21-22 have an approved
direct opening mechanism.
The terminals 11-12, 21-22, and
33-34 can be used as unlike
poles.
11
21
12
22
31
32
Zb
ON
Stroke
11-12
21-22
31-32
Only NC contacts 11-12, 21-22,
and 31-32 have an approved di-
rect opening mechanism.
The terminals 11-12, 21-22, and
31-32 can be used as unlike
poles.
11
33
12
34
Zb
ON
Stroke
11-12
33-34
Only NC contacts 11-12 have an
approved direct opening
mechanism.
The terminals 11-12 and 33-34
can be used as unlike poles.
33
34
11
21
12
22
Zb
ON
Stroke
11-12
21-22
33-34
Only NC contacts 11-12 and
21-22 have an approved direct
opening mechanism.
The terminals 11-12, 21-22 and
33-34 can be used as unlike poles.
F502-EN2-04.book Seite 210 Dienstag, 26. Juli 2005 5:48 17
