D4D-
j
R
D4D-
j
R
1
2
Precautions
CAUTION
Do not use metal connectors or conduits with this switch. Rigid
connectors and conduits may damage the switch. The broken
conduit hole may cause and electrical shock hazard.
If the D4D-
j
R is applied to an emergency stop circuit or safety cir-
cuit for prevention of injury, use the D4D-
j
R model that has an NC
contact equipped with a force-separation mechanism, and make
sure that the D4D-
j
R operates in the positive mode. Furthermore,
secure the D4D-
j
R with screws or equivalent parts that are tight-
ened in a single direction so that the D4D-
j
R cannot be easily
removed. Then provide a protection cover for the D4D-
j
R and post
a warning label near the D4D-
j
R.
Ensure that the actuator is pushed into the lock position by, for ex-
ample, setting up a dog. Not doing so may result in the actuator be-
coming unlocked and causing an accident.
When the Limit Switch locks due to a fault in the system, be sure to
reset the Limit Switch manually before resupplying power after con-
firming the safety of the system.
Be sure to connect a fuse with a breaking current 1.5 to 2 times
larger than the rated current to the Limit Switch in parallel in order to
protect the Limit Switch from damage due to short-circuiting.
When using the Limit Switch for the EN ratings, use the gI or gG
10-A fuse.
Do not use the Limit Switch as a stopper.
Actuation of the Limit Switch over a long time may deteriorate parts
of the Limit Switch and a releasing failure may result. Be sure to
check the condition of the Limit Switch regularly.
When using the Limit Switch as a safety component, be sure to
check the system design for both operational and circuit safety.
Correct Use
Operating Environment
The Limit Switch is intended for indoor use only. Using the Limit
Switch outdoors may result in a malfunction.
Correct Tightening Torque
A loose screw may result in a malfunction. Be sure to tighten each
screw to the proper tightening torque as shown below.
No.
Type
Torque
1
Terminal screw
0.59 to 0.78 N
S
m
2
Cover mounting
screw
0.78 to 0.88 N
S
m
3
Head mounting
screw
0.78 to 0.88 N
S
m
4
Lever mounting
screw
1.57 to 1.77 N
S
m
5
Switch mounting
screw (M4)
0.49 to 0.69 N
S
m
6
Connector
1.8 to 2.2 N
S
m
1.37 to 1.77 N
S
m (see note)
7
Cap screw
1.27 to 1.67 N
S
m
Note:
This applies to the 1/2-14NPT connector.
Mounting
Fasten the Switch with two M4 Allen-head bolts and washers. Pro-
vide a stud with a diameter of 4
-0.05/
-0.15
and a height of 4.8 mm
max. at two places as shown below so that the Switch is firmly fixed
at four points.
Mounting hole
Mounting surface
Hole for stud insertion
4
–0.05
–0.15
dia. height, 4.8 max.
Mounting Holes/Studs
2-conduit
4
–0.05
–0.15
dia. height, 4.8 max.
4
–0.05
–0.15
dia. height, 4.8 max.
Standard 1-conduit
Changing the Head Direction
If the head direction has been changed, check the torque of each
screw and make sure that the screws are free of foreign sub-
stances, and that each screw is tightened to the proper torque.
