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D4N

Safety Limit Switch

D4N

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

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last update: April 1, 2024

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)
1497_lu_1_1		 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-6B20
M20 D4N-8120 D4N-8220 D4N-8A20 ---
Roller lever
(metal lever,
resin roller)
1497_lu_1_1		 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)
1497_lu_1_1		 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)
1497_lu_1_1		 1-conduit Pg13.5 D4N-1126 D4N-1226 D4N-1A26 ---
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 ---
Adjustable roller
lever, form lock
(metal lever,
resin roller)
1497_lu_1_2		 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-8B2G
Adjustable roller
lever, form lock
(metal lever,
rubber roller)
1497_lu_1_3		 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 ---
2-conduit G1/2 D4N-612H --- D4N-6A2H ---
M20 D4N-812H D4N-822H D4N-8A2H D4N-8B2H
Plunger
1497_lu_1_4		 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
1497_lu_1_5		 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)
1497_lu_1_6		 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)
1497_lu_1_7		 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-9A72 D4N-9B72
2-conduit G1/2 D4N-6172 --- --- ---
M20 --- 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)
1497_lu_1_1		 1-conduit Pg13.5 D4N-1C20 D4N-1D20 --- D4N-1F20
G1/2 D4N-2C20 D4N-2D20 D4N-2E20 D4N-2F20
M20 D4N-4C20 D4N-4D20 D4N-4E20 D4N-4F20
2-conduit G1/2 D4N-6C20 D4N-6D20 --- D4N-6F20
M20 D4N-8C20 --- ---
Roller lever
(metal lever, resin roller)
1497_lu_1_1		 1-conduit Pg13.5 D4N-1C22 D4N-1D22 D4N-1E22 ---
G1/2 D4N-2C22 D4N-2D22 --- D4N-2F22
M20 D4N-4C22 D4N-4D22 D4N-4F22
2-conduit G1/2 D4N-6C22 --- --- ---
M20 D4N-8C22 D4N-8F22
Roller lever
(metal lever, metal roller)
1497_lu_1_1		 1-conduit Pg13.5 D4N-1C25 D4N-1D25 --- ---
G1/2 D4N-2C25 D4N-2D25 D4N-2E25 D4N-2F25
M20 D4N-4C25 D4N-4D25 --- D4N-4F25
Roller lever
(metal lever, bearing roller)
1497_lu_1_1		 1-conduit Pg13.5 D4N-1C26 D4N-1D26 --- D4N-1F26
G1/2 D4N-2C26 D4N-2D26 D4N-2F26
M20 D4N-4C26 D4N-4D26 D4N-4F26
Adjustable roller lever,
form lock
(metal lever, resin roller)
1497_lu_1_2		 1-conduit Pg13.5 D4N-1C2G D4N-1D2G --- ---
G1/2 D4N-2C2G D4N-2D2G D4N-2E2G D4N-2F2G
M20 D4N-4C2G D4N-4D2G D4N-4E2G D4N-4F2G
2-conduit G1/2 D4N-6C2G D4N-6D2G --- ---
M20 D4N-8C2G ---
Adjustable roller lever,
form lock
(metal lever, rubber roller)
1497_lu_1_3		 1-conduit Pg13.5 D4N-1C2H D4N-1D2H --- ---
G1/2 D4N-2C2H D4N-2D2H
M20 D4N-4C2H ---
Plunger
1497_lu_1_4		 1-conduit Pg13.5 D4N-1C31 --- --- D4N-1F31
G1/2 D4N-2C31 D4N-2D31 D4N-2E31 D4N-2F31
M20 D4N-4C31 D4N-4D31 D4N-4E31 D4N-4F31
2-conduit G1/2 D4N-6C31 --- D4N-6E31 ---
M20 D4N-8C31 D4N-8D31 --- D4N-8F31
Roller plunger
1497_lu_1_5		 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
2-conduit G1/2 D4N-6C32 D4N-6D32 D4N-6E32 ---
M20 D4N-8C32 D4N-8D32 --- D4N-8F32
One-way roller arm lever
(horizontal)
1497_lu_1_6		 1-conduit Pg13.5 D4N-1C62 D4N-1D62 D4N-1E62 ---
G1/2 D4N-2C62 D4N-2D62 --- D4N-2F62
M20 D4N-4C62 D4N-4D62 D4N-4E62 D4N-4F62
2-conduit G1/2 D4N-6C62 D4N-6D62 --- D4N-6F62
M20 D4N-8C62 --- ---
One-way roller arm lever
(vertical)
1497_lu_1_7		 1-conduit Pg13.5 D4N-1C72 D4N-1D72 D4N-1E72 ---
G1/2 D4N-2C72 D4N-2D72 ---
M20 D4N-4C72 D4N-4D72
2-conduit M20 D4N-8C72 D4N-8D72 --- ---

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)
1497_lu_3_1
 1-conduit G1/2 --- --- D4N-2ARE D4N-2BRE
M20 D4N-4ARE D4N-4BRE
Fork lever lock
(left operation)
1497_lu_3_1
 G1/2 D4N-2ALE D4N-2BLE
M20 D4N-4ALE D4N-4BLE
Cat whisker
1497_lu_3_2
 G1/2 D4N-2180 D4N-2280 --- D4N-2B80
M20 D4N-4180 D4N-4280 D4N-4B80
Plastic rod
1497_lu_3_3
 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)		 1497_lu_3_1 1-conduit G1/2 D4N-2CRE --- --- D4N-2FRE
M20 D4N-4CRE D4N-4DRE D4N-4ERE ---
Fork lever lock
(left operation)		 1497_lu_3_1 G1/2 D4N-2CLE --- --- D4N-2FLE
M20 D4N-4CLE D4N-4DLE D4N-4ELE ---
Cat whisker 1497_lu_3_2 M20 --- D4N-4D80 --- ---
Plastic rod 1497_lu_3_3 G1/2 D4N-2D87
M20 D4N-4D87

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

last update: April 1, 2024

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