Industrial Automation

D4SL-N, D4SL-NSK10-LK[]

Guard Lock Safety-door Switch/D4SL-N-mounting Slide Key

Varied lineup of Guard Lock Safety-door Switches

last update: July 6, 2026

Total number of contacts	Lock monitor	Door monitor	Circuit (Door monitor and Lock monitor)	Door Lock	Head Mate- rial	Indi- cator	Conne- ction Method	Release Key type	Con- duit Outlet	Model
6-contact	3-contact (2NC/ 1NO)	3-contact (2NC/ 1NO)	Circuit number: N	Mech- anical lock	Resin	Yes	Terminal block	Standard	G1/2	D4SL-N2NFA-D
					Resin	Yes	Terminal block	Standard	M20	D4SL-N4NFA-D
					Resin	Yes	Conn- ector	Standard	G1/2	D4SL-N2NFA-DN
					Resin	Yes	Terminal block	Specia (resin)	G1/2	D4SL-N2NFA-D4
				Sole- noid lock	Resin	Yes	Terminal block	Standard	G1/2	D4SL-N2NFG-D
				Sole- noid lock	Resin	Yes	Terminal block	Standard	M20	D4SL-N4NFG-D
	3-contact (3NC)	3-contact (3NC)	Circuit number: R	Mech- anical lock	Resin	Yes	Terminal block	Standard	G1/2	D4SL-N2RFA-D
	3-contact (3NC)	3-contact (3NC)	Circuit number: R	Sole- noid lock	Resin	Yes	Terminal block	Standard	G1/2	D4SL-N2RFG-D
5-contact	2-contact (2NC)	3-contact (3NC)	Circuit number: H	Mech- anical lock	Resin	Yes	Terminal block	Standard	G1/2	D4SL-N2HFA-D
	2-contact (2NC)	3-contact (3NC)	Circuit number: H	Sole- noid lock	Resin	Yes	Terminal block	Standard	G1/2	D4SL-N2HFG-D
	2-contact (2NC)	3-contact (2NC+ 1NO)	Circuit number: F	Mech- anical lock	Resin	Yes	Terminal block	Standard	G1/2	D4SL-N2FFA-D
	2-contact (2NC)	3-contact (2NC+ 1NO)	Circuit number: F	Sole- noid lock	Resin	Yes	Terminal block	Standard	G1/2	D4SL-N2FFG-D

Note: 1. For other models, refer to the Model Number Structure.
2. For detailed internal circuit information, please refer to Model and Contact Configuration on Data Sheet.

Operation Keys

Type		Model
Horizontal mounting		D4SL-NK1
Horizontal mounting (Short)		D4SL-NK1S
Horizontal mounting (Cushion rubber)		D4SL-NK1G
Vertical mounting		D4SL-NK2
Vertical mounting (Cushion rubber)		D4SL-NK2G
Adjustable (Horizontal)		D4SL-NK3
Adjustable (Horizontal/Vertical)		D4SL-NK5

Connector Cables

Cable length	Model
1 m	D4SL-CN1
3 m	D4SL-CN3
5 m	D4SL-CN5
10 m	D4SL-CN10

Slide Key

Specifications	Contents	Model
Weight: Approx. 0.6 kg Mechanical durability: 20,000 operations min.	Slide Key: 1 (not yet mounted) Inner Lever: None D4SL-N mounting plate: 1 Door Switch special mounting screws: 3 D4SL-NK1 (operation key): 1 D4SL-NK1 special mounting screws: 2 Lockout keys: 2 Lockout key strap: 1 Caution labels (stickers): 2 sheets (English and Japanese)	*D4SL-NSK10-LK 1**
		*D4SL-NSK10-LK-[] 2**
Weight: Approx. 0.1 kg	Inner Lever: 1	*D4SL-SK10H 3**
Weight: Approx. 0.7 kg Mechanical durability: 20,000 operations min.	Slide Key: 1 (not yet mounted) Inner Lever: 1 D4SL-N mounting plate: 1 Door Switch special mounting screws: 3 D4SL-NK1 (operation key): 1 D4SL-NK1 special mounting screws: 2 Lockout keys: 2 Lockout key strap: 1 Caution labels (stickers): 2 sheets (English and Japanese)	*D4SL-NSK10-LKH 1**
		*D4SL-NSK10-LKH-[] 2**

Note: 1. The Door Switch is not included. Select the Door Switch depending on the necessary number of contacts and the
conduit outlet.
The contents are provided as a total set, individual contents cannot be ordered separately.
2. Perform risk assessment for the equipment in question, configure relay units and other safety circuits, and use
properly.
*1. The number for the lockout key is 01.
*2. Replace the box with 02 to 30 (lockout key number). Ask your OMRON representative for delivery times.
*3. The inner lever for D4SL-NSK10 that can not be used for other products and applications.

last update: July 6, 2026

Product Category

Safety Components
- Safety Door Switches
  - Guard Lock Safety-door Switches
    - D4SL-N, D4SL-NSK10-LK[]
    - D4NL
    - D4JL, D4JL-SK40
    - D4BL

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