G-243
D4B-
@
N
D4
B-
@
N
Safety Limit Switch
D4B-
#
N
• Snap-action or slow-action contact for
accurate switching with safe operation
via a direct opening mechanism with
metal deposition between mating con-
tacts.
• Two sets of contacts: one (NC) for safe-
ty category circuit and the other (NO)
for control circuit.
• Contacts opened by direct opening
mechanism (NC contacts only), thus
preventing faulty operation due to fac-
tors such as metal deposition.
• Wide standard operating temperature
range:
–40°C to 80°C (standard type).
• Safety of lever settings ensured using a
mechanism that engages a gear be-
tween the operating position indicator
plate and the lever.
• Equipped with a mechanism that indi-
cates the applicable operating zone, as
well as push-button switching to control
left and right motion.
• Conforms to EN (TÜV) standards cor-
responding to the CE marking.
• 3-conduit switches are available.
• Metric conduit types available.
Model Number Structure
Model Number Legend
1. Conduit
1:
PG13.5 (1-conduit)
2:
G1/2 (PF1/2) (1-conduit)
3:
1/2-14NPT (1-conduit)
4:
M20
5:
PG13.5 (3-conduit)
6:
G1/2 (PF1/2) (3-conduit)
7:
1/2-14NPT (3-conduit)
8:
M20 (3-conduit)
2. Built-in Switch
1:
1NC/1NO (snap-action)
3:
1NC/1NO (slow-action) gold-plated contacts
5:
1NC/1NO (slow-action) (see note)
A:
2NC (slow-action)
B:
2NC (slow-action) gold-plated contacts
Note: Excluding D4B-
##
81N and D4B-
##
87N models.
3. Actuator
00:
Switch box (without head)
11:
Roller lever (standard)
16:
Adjustable roller lever
17:
Adjustable rod lever
1R:
Roller lever
(conventional D4B-compatible)
70:
Top plunger
71:
Top roller plunger
81:
Coil spring
87:
Plastic rod
1 2 3
D4B-
####
N
F502-EN2-04.book Seite 243 Dienstag, 26. Juli 2005 5:48 17
