G-278
Safety Sensors / Components
•
If the Switch is to be used in an emergency stop circuit or in a
safety circuit for preventing accidents resulting in injuries or deaths,
use a model that has an NC contact equipped with a direct opening
mechanism and make sure that the Switch operates in the direct
opening mode. Furthermore, secure the Switch with screws or
equivalent parts that are tightened in a single direction so that the
Switch cannot be easily removed. Then provide a protection cover
for the Switch and post a warning label near the Switch.
•
Make sure that the actuator is pushed into the lock position. Not
doing so may result in the actuator becoming unlocked, causing an
accident.
•
Always reset the Switch manually. Not doing so may result in
damage to the reset function.
•
When the Switch locks due to a fault in the system, be sure to reset
the Switch manually before resupplying power after confirming the
safety of the system.
•
Check the Switches before use and inspect regularly, replacing
them when necessary. If a Switch is kept pressed for an extended
period of time, the components may deteriorate quickly, and the
Switch may not release.
•
When using the Switch as a safety component, be sure to check
the system design for both operational and circuit safety.
Precautions for Correct Use
Environment
•
The Switch is intended for indoor use only.
•
Do not use the Switch outdoors. Doing so may cause the Switch to
malfunction.
•
Do not use the Switch where hazardous gases (e.g., H
2
S, SO
2
,
NH
3
, HNO
3
, CI
2
) are present or in locations subject to high
temperature and humidity. Doing so may result in damage to the
Switch caused by contact failure or corrosion.
•
Do not use the Switch under any of the following conditions.
•
Locations subject to extreme temperature changes.
•
Locations where high humidity or condensation may occur.
•
Locations subject to excessive vibration.
•
Locations where metal dust, processing waste, oil, or chemicals
may penetrate through the protective door.
•
Locations subject to detergents, thinner, or other solvents.
Mounting Method
Mounting Screw Tightening Torque
Tighten each of the screws to the specified torque. Loose screws
may result in malfunction of the Switch within a short time.
Switch Mounting
•
Mount the Switch using M4 screws and washers and tighten the
screws to the specified torque.
•
For safety, use screws that cannot be easily removed, or use an
equivalent measure to ensure that the Switch is secure.
•
Secure the Switch with two M4 bolts and washers. Provide studs
with a diameter of 4
0.05
/
0.15
and a height of 4.8 mm max. at two
places, inserting into the holes at the bottom of the Switch as
shown below so that the Switch is firmly fixed at four points.
Switch Mounting Holes
One-conduit Type
Two-conduit Type
Changing the Head Direction
By removing the four screws of the head, the mounting direction of
the head can be changed. The head can be mounted in four direc-
tions. Be sure that no foreign material will enter the head during a
change in direction.
Wiring
•
When connecting to the terminals via insulating tube and M3.5
crimp terminals, arrange the crimp terminals as shown below so
that they do not rise up onto the case or the cover. Applicable lead
wire size: AWG20 to AWG18 (0.5 to 0.75 mm
2
).
Use lead wires of an appropriate length, as shown below. Not doing
so may result in excess length causing the cover to rise and not fit
properly.
One-conduit Type (3 Poles)
Two-conduit Type (3 Poles)
1
Terminal screw
0.6 to 0.8 N·m
2
Cover clamping screw
0.5 to 0.7 N·m
3
Head clamping screw
0.5 to 0.6 N·m
4
Lever clamping screw
1.6 to 1.8 N·m
5
Body clamping screw
0.5 to 0.7 N·m
6
Conduit mounting connection,
M12 adaptor
1.8 to 2.2 N·m (except 1/2-
14NPT)
1.4 to 1.8 N·m (1/2-14NPT)
7
Cap screw
1.3 to 1.7 N·m
7
6
3
4
5
1
2
22
±
0.1
47
±
0.1
20
±
0.1
22
±
0.1
2.5
±
0.1
Two, M4
−
0.15
4
−
0.05
dia.
height, 4.8 max.
Mounting hole
Mounting surface
Mounting pin
insertion hole
−
0.15
4
−
0.05
dia.
height, 4.8 max.
42
±
0.1
39
±
0.1
20
±
0.1
22
±
0.1
40
±
0.1
42
±
0.1
2.5
±
0.1
5.35
±
0.1
Two, M4
−
0.15
4
−
0.05
dia.
height, 4.8 max.
22
21
34
33
12
11
A
A
C
E
B
D
F
C
E
B
D
F
28 mm
Tolerance
±
2 mm
33 mm
42 mm
22
21
34
33
12
11
A
C
E
B
D
F
A
C
E
B D F
28 mm
Tolerance
±
2 mm
Left hand
42 mm
A
C
E
B D F
28 mm
Tolerance
±
2 mm
Right hand
42 mm
F502-EN2-04.book Seite 278 Dienstag, 26. Juli 2005 5:48 17
