Safety Limit Switch
D4B-@N
CSM_D4B-_N_DS_E_5_1
Snap-action contact with certified direct
Note: Contact your sales representative for details on models
with safety standard certification.
opening operation certification .
Maintenance, seal, and resistance to
shock increased and direct opening
mechanism added.
Three-conduit switches and 2NC
switches are also available.
Direct opening mechanism (NC contacts only) added to
enable opening contacts when faults occur, such as fused
contacts.
Safety of lever settings ensured using a mechanism that
engages a gear between the operating position indicator plate
and the lever.
Equipped with a mechanism that indicates the applicable
operating zone, as well as push-button switching to control left
and right motion.
Head seal structure strengthened to improve seal properties
(TV: IEC IP67, UL: NEMA 3, 4, 4X, 6P, and 13).
Wide standard operating temperature range:
40 to 80C (standard type).
Models with gold-plated contacts added to the series to
enable handling microloads.
Certified standards: UL, CSA, EN (TV), and CCC.
Be sure to read the Safety Precautions on page 14
and the Precautions for All Safety Limit Switches .
Model Number Structure
Model Number Legend
D4B-@@@@N
1 2 3
1. Conduit size 3. Actuator
1: PG13.5 (1-conduit) 00: Switch box (without head)
2: G1/2 (PF1/2) (1-conduit) 11: Roller lever (resin roller)
3: 1/2-14NPT (1-conduit) 15: Roller lever (stainless steel roller)
4: M20 (1 conduit) 1R:Roller lever
5: PG13.5 (3-conduit) (conventional D4B-compatible)
6: G1/2 (PF1/2) (3-conduit) 16: Adjustable roller lever
7: 1/2-14NPT (3-conduit) 17: Adjustable rod lever
8: M20 (3-conduit) 70: Top plunger
2. Built-in Switch 71: Top roller plunger
1: 1NC/1NO (snap-action)
81: Coil spring
3: 1NC/1NO (snap-action) gold-plated contacts
87: Plastic rod
5: 1NC/1NO (slow-action) *
6: 1NC/1NO (slow-action) gold-plated contacts *
A: 2NC (slow-action)
B: 2NC (slow-action) gold-plated contacts
* Excluding D4B-@@81N and D4B-@@87N models.
1D4B-@N
Ordering Information
Set Model Numbers
Consult with your OMRON representative when ordering any models that are not listed in this table.
Safety Limit Switches (with Direct Opening Mechanism)
1NC/1NO (Snap-action) 1NC/1NO (Slow-action) 2NC (Slow-action)
Actuator Conduit openings
Direct Direct Direct
Model Model Model
opening opening opening
Pg13.5 D4B-1111N D4B-1511N D4B-1A11N
G1/2 (PF1/2) D4B-2111N D4B-2511N D4B-2A11N
1/2-14NPT D4B-3111N D4B-3511N D4B-3A11N
M20 D4B-4111N D4B-4511N D4B-4A11N
Roller lever
(resin roller)
Pg13.5 (3-conduit) D4B-5111N D4B-5511N D4B-5A11N
G1/2 (3-conduit) D4B-6111N D4B-6511N D4B-6A11N
1/2-14NPT (3-conduit) D4B-7111N D4B-7511N D4B-7A11N
M20 (3-conduit) D4B-8111N D4B-8511N D4B-8A11N
Pg13.5 D4B-1115N D4B-1515N D4B-1A15N
G1/2 (PF1/2) D4B-2115N D4B-2515N D4B-2A15N
Roller lever
(stainless steel 1/2-14NPT D4B-3115N D4B-3515N D4B-3A15N
roller)
M20 D4B-4115N D4B-4515N D4B-4A15N
Pg13.5 (3-conduit) D4B-5115N D4B-5515N D4B-5A15N
Pg13.5 D4B-1170N D4B-1570N D4B-1A70N
G1/2 (PF1/2) D4B-2170N D4B-2570N D4B-2A70N
1/2-14NPT D4B-3170N D4B-3570N D4B-3A70N
M20 D4B-4170N D4B-4570N D4B-4A70N
Top plunger
Pg13.5 (3-conduit) D4B-5170N D4B-5570N D4B-5A70N
G1/2 (3-conduit) D4B-6170N D4B-6570N D4B-6A70N
1/2-14NPT (3-conduit) D4B-7170N D4B-7570N D4B-7A70N
M20 (3-conduit) D4B-8170N D4B-8570N D4B-8A70N
Pg13.5 D4B-1171N D4B-1571N D4B-1A71N
G1/2 (PF1/2) D4B-2171N D4B-2571N D4B-2A71N
1/2-14NPT D4B-3171N D4B-3571N D4B-3A71N
M20 D4B-4171N D4B-4571N D4B-4A71N
Top roller plunger
Pg13.5 (3-conduit) D4B-5171N D4B-5571N D4B-5A71N
G1/2 (3-conduit) D4B-6171N D4B-6571N D4B-6A71N
1/2-14NPT (3-conduit) D4B-7171N D4B-7571N D4B-7A71N
M20 (3-conduit) D4B-8171N D4B-8571N D4B-8A71N
2