VB-4251 Omron, VB-4251 Datasheet - Page 7
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VB-4251
Manufacturer Part Number
VB-4251
Description
4 ROLLER PLNGRS, 4 CONDUIT
Manufacturer
Omron
Series
VBr
Type
Limit Switchr
Datasheet
1.VB-2121.pdf
(9 pages)
Specifications of VB-4251
Circuit
SPDT
Switch Function
On-Mom
Contact Rating @ Voltage
10A @ 125VAC
Actuator Type
Roller Plunger
Mounting Type
Chassis Mount
Termination Style
Screw Terminal
Operating Force
1471gf
Pole Throw Configuration
SPDT
Switch Function Configuration
N.O./N.C.
Current Rating (max)
10A
Operating Temp Range
-10C to 80C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
VB4251
Tightening Torque
1. Tighten each cover mounting screw to a torque of 1.18 to
2. Tighten each switch terminal screw to a torque of 0.20 to
Be sure to wire each solderless terminal correctly with a screw as
shown below.
3. Apply a torque of 5.88 to 6.86 N·m to tighten each mounting bolt
Mounting Holes
198
1.37 N·m.
0.49 N·m if the mounting screw is M3 in size.
of the casing if the mounting bolt is an Allen-head bolt that is M6
in size. Apply a torque of 8.04 to 9.22 N·m instead if the mounting
bolt is an Allen-head bolt that is M8 in size.
Mounting
Correct
With a Flange Switch Box
Without a Flange Switch Box
Multiple Limit Switch
Terminal screw
Four, 6.5-dia. or
M6 mounting
holes
Two, 6 dia.
protruding positions
Solderless terminal
-0.05
/
−0.15
Two, 8.5-dia. or
M8 mounting
holes
VB
Two, 8.5-dia. or
M8 mounting
holes
Incorrect
Wiring
Connect a cable with a thickness of 0.75 mm
Switch through the M3 round solderless terminals with insulation
covers.
Dimensions of Round Solderless Terminal
Wiring (Ground Terminal Models)
Note: Consult your OMRON representative for details on models with
Others
Carefully connect a conduit to each conduit hole and apply a seal or
tape to seal the conduit hole so that cuttings or other materials will
not penetrate through the conduit hole.
Use the SC Connector. Consult your OMRON representative for
details on SC Connectors.
Make sure that the position of the actuator that is traveling does not
exceed the overtravel (OT) position.
Make sure that the operating stroke is 70% to 100% of the specified
OT distance.
dz dia.: 3.2
D dia.:
B:
L:
F:
l:
3 to 6 plungers.
Ground terminal
1.9
5.2
16.4
5.8
8.0 (mm)
D dia.
d
Z
dia.
VB
2
to the VB Multiple Limit
SC connector
Built-in switch