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D4N

Safety Limit Switch

D4N

Popular Safety Limit Switches Providing a Full Lineup Conforming to International Standards

Consult with your OMRON representative when ordering any models that are not listed in this table.

Switches with Two Contacts (with Direct Opening Mechanism)

Actuator Conduit size Built-in switch mechanism
1NC/1NO
(Snap-action)
2NC
(Snap-action)
1NC/1NO
(Slow-action)
2NC
(Slow-action)
Model Model Model Model
Roller lever
(resin lever, resin roller)
1-conduit Pg13.5 D4N-1120 D4N-1220 D4N-1A20 D4N-1B20
G1/2 D4N-2120 D4N-2220 D4N-2A20 D4N-2B20
M20 D4N-4120 D4N-4220 D4N-4A20 D4N-4B20
M12 connector D4N-9120 D4N-9220 D4N-9A20 D4N-9B20
2-conduit G1/2 D4N-6120 D4N-6220 D4N-6A20 D4N-6B20
M20 D4N-8120 D4N-8220 D4N-8A20 D4N-8B20
Roller lever
(metal lever, resin roller)
1-conduit Pg13.5 D4N-1122 D4N-1222 D4N-1A22 D4N-1B22
G1/2 D4N-2122 D4N-2222 D4N-2A22 D4N-2B22
M20 D4N-4122 D4N-4222 D4N-4A22 D4N-4B22
M12 connector D4N-9122 D4N-9222 D4N-9A22 D4N-9B22
2-conduit G1/2 D4N-6122 D4N-6222 D4N-6A22 D4N-6B22
M20 D4N-8122 D4N-8222 D4N-8A22 D4N-8B22
Roller lever
(metal lever, metal roller)
1-conduit Pg13.5 D4N-1125 D4N-1225 D4N-1A25 D4N-1B25
G1/2 D4N-2125 D4N-2225 D4N-2A25 D4N-2B25
M20 D4N-4125 D4N-4225 D4N-4A25 D4N-4B25
M12 connector D4N-9125 D4N-9225 D4N-9A25 D4N-9B25
Roller lever
(metal lever, bearing roller)
1-conduit Pg13.5 D4N-1126 D4N-1226 D4N-1A26 D4N-1B26
G1/2 D4N-2126 D4N-2226 D4N-2A26 D4N-2B26
M20 D4N-4126 D4N-4226 D4N-4A26 D4N-4B26
M12 connector D4N-9126 D4N-9226 D4N-9A26 D4N-9B26
Adjustable roller lever,
form lock (metal lever,
resin roller)
1-conduit Pg13.5 D4N-112G D4N-122G D4N-1A2G D4N-1B2G
G1/2 D4N-212G D4N-222G D4N-2A2G D4N-2B2G
M20 D4N-412G D4N-422G D4N-4A2G D4N-4B2G
M12 connector D4N-912G D4N-922G D4N-9A2G D4N-9B2G
2-conduit G1/2 D4N-612G D4N-622G D4N-6A2G D4N-6B2G
M20 D4N-812G D4N-822G D4N-8A2G D4N-8B2G
Adjustable roller lever,
form lock (metal lever,
rubber roller)
1-conduit Pg13.5 D4N-112H D4N-122H D4N-1A2H D4N-1B2H
G1/2 D4N-212H D4N-222H D4N-2A2H D4N-2B2H
M20 D4N-412H D4N-422H D4N-4A2H D4N-4B2H
M12 connector D4N-912H D4N-922H D4N-9A2H D4N-9B2H
2-conduit G1/2 D4N-612H D4N-622H D4N-6A2H D4N-6B2H
M20 D4N-812H D4N-822H D4N-8A2H D4N-8B2H
Plunger
1-conduit Pg13.5 D4N-1131 D4N-1231 D4N-1A31 D4N-1B31
G1/2 D4N-2131 D4N-2231 D4N-2A31 D4N-2B31
M20 D4N-4131 D4N-4231 D4N-4A31 D4N-4B31
M12 connector D4N-9131 D4N-9231 D4N-9A31 D4N-9B31
2-conduit G1/2 D4N-6131 D4N-6231 D4N-6A31 D4N-6B31
M20 D4N-8131 D4N-8231 D4N-8A31 D4N-8B31
Roller plunger
1-conduit Pg13.5 D4N-1132 D4N-1232 D4N-1A32 D4N-1B32
G1/2 D4N-2132 D4N-2232 D4N-2A32 D4N-2B32
M20 D4N-4132 D4N-4232 D4N-4A32 D4N-4B32
M12 connector D4N-9132 D4N-9232 D4N-9A32 D4N-9B32
2-conduit G1/2 D4N-6132 D4N-6232 D4N-6A32 D4N-6B32
M20 D4N-8132 D4N-8232 D4N-8A32 D4N-8B32
One-way roller arm lever
(horizontal)
1-conduit Pg13.5 D4N-1162 D4N-1262 D4N-1A62 D4N-1B62
G1/2 D4N-2162 D4N-2262 D4N-2A62 D4N-2B62
M20 D4N-4162 D4N-4262 D4N-4A62 D4N-4B62
M12 connector D4N-9162 D4N-9262 D4N-9A62 D4N-9B62
2-conduit G1/2 D4N-6162 D4N-6262 D4N-6A62 D4N-6B62
M20 D4N-8162 D4N-8262 D4N-8A62 D4N-8B62
One-way roller arm lever
(vertical)
1-conduit Pg13.5 D4N-1172 D4N-1272 D4N-1A72 D4N-1B72
G1/2 D4N-2172 D4N-2272 D4N-2A72 D4N-2B72
M20 D4N-4172 D4N-4272 D4N-4A72 D4N-4B72
M12 connector D4N-9172 D4N-9272 D4N-9A72 D4N-9B72
2-conduit G1/2 D4N-6172 D4N-6272 D4N-6A72 D4N-6B72
M20 D4N-8172 D4N-8272 D4N-8A72 D4N-8B72

Switches with Three Contacts and MBB Contacts (with Direct Opening Mechanism)

Actuator Conduit size Built-in switch mechanism
2NC/1NO
(Slow-action)
3NC
(Slow-action)
1NC/1NO MBB
(Slow-action)
2NC/1NO MBB
(Slow-action)
Model Model Model Model
Roller lever
(resin lever, resin roller)
1-conduit Pg13.5 D4N-1C20 D4N-1D20 D4N-1E20 D4N-1F20
G1/2 D4N-2C20 D4N-2D20 D4N-2E20 D4N-2F20
M20 D4N-4C20 D4N-4D20 D4N-4E20 D4N-4F20
M12 connector --- --- D4N-9E20 ---
2-conduit G1/2 D4N-6C20 D4N-6D20 D4N-6E20 D4N-6F20
M20 D4N-8C20 D4N-8D20 D4N-8E20 D4N-8F20
Roller lever
(metal lever, resin roller)
1-conduit Pg13.5 D4N-1C22 D4N-1D22 D4N-1E22 D4N-1F22
G1/2 D4N-2C22 D4N-2D22 D4N-2E22 D4N-2F22
M20 D4N-4C22 D4N-4D22 D4N-4E22 D4N-4F22
M12 connector --- --- D4N-9E22 ---
2-conduit G1/2 D4N-6C22 D4N-6D22 D4N-6E22 D4N-6F22
M20 D4N-8C22 D4N-8D22 D4N-8E22 D4N-8F22
Roller lever
(metal lever, metal roller)
1-conduit Pg13.5 D4N-1C25 D4N-1D25 D4N-1E25 D4N-1F25
G1/2 D4N-2C25 D4N-2D25 D4N-2E25 D4N-2F25
M20 D4N-4C25 D4N-4D25 D4N-4E25 D4N-4F25
M12 connector --- --- D4N-9E25 ---
Roller lever
(metal lever, bearing roller)
1-conduit Pg13.5 D4N-1C26 D4N-1D26 D4N-1E26 D4N-1F26
G1/2 D4N-2C26 D4N-2D26 D4N-2E26 D4N-2F26
M20 D4N-4C26 D4N-4D26 D4N-4E26 D4N-4F26
M12 connector --- --- D4N-9E26 ---
Adjustable roller lever,
form lock
(metal lever, resin roller)
1-conduit Pg13.5 D4N-1C2G D4N-1D2G D4N-1E2G D4N-1F2G
G1/2 D4N-2C2G D4N-2D2G D4N-2E2G D4N-2F2G
M20 D4N-4C2G D4N-4D2G D4N-4E2G D4N-4F2G
M12 connector --- --- D4N-9E2G ---
2-conduit G1/2 D4N-6C2G D4N-6D2G D4N-6E2G D4N-6F2G
M20 D4N-8C2G D4N-8D2G D4N-8E2G D4N-8F2G
Adjustable roller lever,
form lock
(metal lever, rubber roller)
1-conduit Pg13.5 D4N-1C2H D4N-1D2H D4N-1E2H D4N-1F2H
G1/2 D4N-2C2H D4N-2D2H D4N-2E2H D4N-2F2H
M20 D4N-4C2H D4N-4D2H D4N-4E2H D4N-4F2H
M12 connector --- --- D4N-9E2H ---
2-conduit G1/2 D4N-6C2H D4N-6D2H D4N-6E2H D4N-6F2H
M20 D4N-8C2H D4N-8D2H D4N-8E2H D4N-8F2H
Plunger
1-conduit Pg13.5 D4N-1C31 D4N-1D31 D4N-1E31 D4N-1F31
G1/2 D4N-2C31 D4N-2D31 D4N-2E31 D4N-2F31
M20 D4N-4C31 D4N-4D31 D4N-4E31 D4N-4F31
M12 connector --- --- D4N-9E31 ---
2-conduit G1/2 D4N-6C31 D4N-6D31 D4N-6E31 D4N-6F31
M20 D4N-8C31 D4N-8D31 D4N-8E31 D4N-8F31
Roller plunger
1-conduit Pg13.5 D4N-1C32 D4N-1D32 D4N-1E32 D4N-1F32
G1/2 D4N-2C32 D4N-2D32 D4N-2E32 D4N-2F32
M20 D4N-4C32 D4N-4D32 D4N-4E32 D4N-4F32
M12 connector --- --- D4N-9E32 ---
2-conduit G1/2 D4N-6C32 D4N-6D32 D4N-6E32 D4N-6F32
M20 D4N-8C32 D4N-8D32 D4N-8E32 D4N-8F32
One-way roller arm lever
(horizontal)
1-conduit Pg13.5 D4N-1C62 D4N-1D62 D4N-1E62 D4N-1F62
G1/2 D4N-2C62 D4N-2D62 D4N-2E62 D4N-2F62
M20 D4N-4C62 D4N-4D62 D4N-4E62 D4N-4F62
M12 connector --- --- D4N-9E62 ---
2-conduit G1/2 D4N-6C62 D4N-6D62 D4N-6E62 D4N-6F62
M20 D4N-8C62 D4N-8D62 D4N-8E62 D4N-8F62
One-way roller arm lever
(vertical)
1-conduit Pg13.5 D4N-1C72 D4N-1D72 D4N-1E72 D4N-1F72
G1/2 D4N-2C72 D4N-2D72 D4N-2E72 D4N-2F72
M20 D4N-4C72 D4N-4D72 D4N-4E72 D4N-4F72
M12 connector --- --- D4N-9E72 ---
2-conduit G1/2 D4N-6C72 D4N-6D72 D4N-6E72 D4N-6F72
M20 D4N-8C72 D4N-8D72 D4N-8E72 D4N-8F72

General-purpose Switches with Two Contacts

Actuator Conduit size Built-in switch mechanism
1NC/1NO
(Snap-action)
2NC
(Snap-action)
1NC/1NO
(Slow-action)
2NC
(Slow-action)
Model Model Model Model
Fork lever lock
(right operation)
1-conduit G1/2 --- --- D4N-2ARE D4N-2BRE
M20 D4N-4ARE D4N-4BRE
Fork lever lock
(left operation)
G1/2 D4N-2ALE D4N-2BLE
M20 D4N-4ALE D4N-4BLE
Cat whisker
G1/2 D4N-2180 D4N-2280 --- D4N-2B80
M20 D4N-4180 D4N-4280 D4N-4B80
Plastic rod
G1/2 D4N-2187 D4N-2287 D4N-2B87
M20 D4N-4187 D4N-4287 D4N-4B87

Note: Mechanically speaking, these models are general-purpose switches with no direct opening mechanism.

General-purpose Switches with Three Contacts and MBB Contacts

Actuator Conduit size Built-in switch mechanism
2NC/1NO
(Slow-action)
3NC
(Slow-action)
1NC/1NO MBB
(Slow-action)
2NC/1NO MBB
(Slow-action)
Model Model Model Model
Fork lever lock
(right operation)
1-conduit G1/2 D4N-2CRE D4N-2DRE D4N-2ERE D4N-2FRE
M20 D4N-4CRE D4N-4DRE D4N-4ERE D4N-4FRE
Fork lever lock
(left operation)
G1/2 D4N-2CLE D4N-2DLE D4N-2ELE D4N-2FLE
M20 D4N-4CLE D4N-4DLE D4N-4ELE D4N-4FLE
Cat whisker
G1/2 --- D4N-2D80 --- ---
M20 D4N-4D80
Plastic rod
G1/2 D4N-2D87
M20 D4N-4D87

Note: Mechanically speaking, these models are general-purpose switches with no direct opening mechanism.