Filter
Top Products
A-78 Guard Lock Safety-door Switch D4BL
D4BL
Safety Door
Switches
Safety Precautions
Refer to the “Precautions for All Switches” on page I-2 and “Precautions for All Safety Door Switches” on page A-2.
!CAUTION
■ Precautions for Safe Use
•
Do not use the Switch submersed in oil or water or in locations
continuously subject to splashes of oil or water. Doing so may result
in oil or water entering the Switch. (The IP67 degree of protection of
the Switch specifies the amount of water penetration after the
Switch is submerged in water for a certain period of time.)
• Although the Switch body is protected from the ingress of dust or
water, avoid the ingress of foreign substance through the key hole
on the head.
Otherwise, accelerated wear or breaking may result.
• Always attach the cover after completing wiring and before using
the Switch. Electric shock may occur if the Switch is used without
the cover attached.
Connect a fuse in series with the D4BL in series to protect it from
short-circuit damage. The value of the breaking current of the fuse
must be calculated by multiplying the rated current by 150% to 200%.
To prevent the D4BL from burning due to overvoltage, insert a
protection fuse into the solenoid circuit.
Stopper Installation
Do not use a Switch as a stopper. Be sure to install a stopper as
shown in the following illustration when mounting the Switch so that
the Operation Key is within 0.5 to 5 mm of the set zone.
■ Precautions for Correct Use
Tightening Torque
Loose screws may result in malfunction. Tighten the screws to the
specified torques.
Note: Use M5 screws. Apply a torque of 4.90 to 5.88 N·m for an Allen-
head bolt. For a pan head screw, apply a torque of 2.35 to
2.75 N·m
Auxiliary Release Key
The auxiliary release key is used to unlock the D4BL in case of
emergency or in case the power supply to the D4BL fails.
Use the enclosed Release Key to change the lock from LOCK to
UNLOCK so that the lock will be released and the door can be
opened. (Applies only to mechanical locks.)
The auxiliary release key applied to the door of a machine room
ensures the safety of people adjusting the equipment in the machine
room. If the auxiliary release key is set to UNLOCK, the door will not
be locked when the door is closed and no power will be supplied to
the equipment.
Whenever the lock has been changed to UNLOCK, always return it
to LOCK before using the Switch.
Do not use the auxiliary release key to start or stop machines.
To prevent the auxiliary release key from being handled carelessly by
unauthorized people, seal the auxiliary release key with sealing wax
and the provided seal cap to ensure IP67.
Make sure that the auxiliary release key is kept with the person in
charge.
Before attaching the cover to the D4BL, make sure that the auxiliary
release key position is set to LOCK.
Do not insert the Operation Key when the door is open.
The machine may operate, possibly resulting in injury.
Before using the machine, be sure to remove the shock-
absorbing damper, which is provided before shipping.
Stopper
Switch
Gap
Set zone
Type Torque
1 M3.5 terminal screw (including terminal screw) 0.59 to 0.78 N·m
2 Cover mounting screw 1.18 to 1.37 N·m
3 Head mounting screw 0.78 to 0.98 N·m
4 M5 body mounting screw (See note.) 4.90 to 5.88 N·m
5 Operation Key mounting screw 2.35 to 2.75 N·m
6 Connector 1.77 to 2.16 N·m
7 Cap screw 1.27 to 1.67 N·m
Two, M5 Operation Key mounting screw
Four, M3.5 head-mounting screw
Conduit
Conduit cap
Four, M4 cover-mounting screw
Four, M5
switch-mountin
g
screw
UNLOCK
LOCK
Auxiliary
release key