Datasheet
D4SL-N / D4SL-NSK10-LK@
26
D4SL-NSK10-LK@
• Use this product for a lightweight door (20 kg max). Otherwise the 
product may be damaged.
• This product is for D4SL-N Guard Lock Safety-door Switch only. 
This product cannot be used with any other manufacturer's door 
switches.
• Use the Slide Handle in the direction A or B in the following figure.
• Loose screws may result in malfunction. Use washers and tighten 
the screws to the specified torques. Mount the Slide Base at four 
points with screws. Adding adhesive is recommended for 
preventing the screws from loosening.
Also, when mounting the Product to a door for disable-prevention 
purposes, purchase and use tamper-resistant screws.
Approriate Tightening Torque
Technical Specifications
• Do not store the Switch where corrosive gases (e.g., H2S, SO2, 
NH
3, HNO3 or Cl2) or dust is present, or in locations subject to high 
temperature or humidity.
• Perform maintenance inspections periodically.
• When the lockout key is attached to your wrist, be careful that the 
strap does not get stuck in equipment.
Nomenclature
Differences between Lockout Key and Trapped Key 
(Reference)
• When mounting the operation key, line up the inside edges of the 
long operation key holes with the outer edges of the slide handle 
as in the following figure to ensure easy position adjustment.
• Use the supplied special screws to mount the operation key and 
D4SL-N Guard Lock Safety-door Switch.
• To tighten the screws, use the tip of a flat-head screwdriver on the 
screw heads as shown in the following figure.
• The special screws cannot be removed once they are tightened.
Mounting of innner lever
Mounting method
1) Detaching of mounting screw
Remove the handle mounting screw with TORX screwdriver (T30).
2) Mounting of inner lever
Tighten A portion of the inner lever to a suitable torque with wrench 
(width across flat: 10mm).
• This product is for Omron, the D4SL-NSK10 only. This product 
cannot be used with any other products.
• Do not operate the handle with the handle mounting screw 
removed. Doing so may result in malfunction.
• Be careful not to lose the spring washer and hexagonal nut when 
remove the handle mounting screw. (Fig.1)
• Loose inner lever may result in malfunction. Use washers and 
tighten the inner lever to the specified torque. (Fig.2)
Slide Key mounting screw (M6) 6.0 to 7.0 N•m
Operation key special mounting screw 
(screws supplied)
2.4 to 2.8 N•m
Switch special mounting screw 
(screws supplied)
0.75 to 1.15 N•m
Inner Lever 9 to 10 N•m
Ambient operating temperature −10 to 55°C (with no icing)
Ambient operating humidity 95% max.
Mechanical durability 20,000 operations min.
AB
SLIDE
LOCK
SLIDE
FREE
SLIDE
LOCK
SLIDE
FREE
Slide Key Unit
D4SL-N Guard Lock Safety-door Switch
Release Key
Operation Key
Lockout key
Slide Handle
Slide Base
Shot Bolt
Guide
Lockout key
Trapped key
(Refer to information on the 
D4JL-@@@A-@7-@@)
Closing 
the door
The door cannot be closed 
unless the lockout key is 
inserted in the slide and 
turned.
The door cannot be closed 
unless the trapped key is 
inserted in the Door Switch 
and turned.
Opening 
the door
The door can be opened by 
supplying power to the Door 
Switch solenoid without 
operating the lockout switch.
The door can never be opened 
without both supplying power 
to the Door Switch solenoid 
and operating the trapped key.
Note: The special screws are 
designed so that they cannot 
be turned counter-clockwise 
using a flat-head 
screwdriver.
Handle mounting screw
(TORX_T30/M6)
Spring washer
(M6)
Fig.1
Hexagonal nut (M6)
Handle
Spring washer
(M6)
Fig.1
Tightening Torque
Inner lever
A
Inner lever (M6)
9 to 10 N
.
m










