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Safety Limit Switch

D4N

D4N

Upgraded Safety Limit Switches Based on the Popular D4D, Providing a Full Lineup Conforming to International Standards

Primary Contents



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

Switches with Two Contacts (with Direct Opening Mechanism)

ActuatorConduit sizeBuilt-in switch mechanism
1NC/1NO
(Snap-action)
2NC
(Snap-action)
1NC/1NO
(Snap-action)
2NC
(Slow-action)
ModelModelModelModel
Roller lever
(resin lever,
resin roller)
1-
conduit
Pg13.5D4N-1120D4N-1220D4N-1A20D4N-1B20
G1/2D4N-2120D4N-2220D4N-2A20D4N-2B20
1/2-14NPTD4N-3120D4N-3220D4N-3A20D4N-3B20
M20D4N-4120D4N-4220D4N-4A20D4N-4B20
M12 connectorD4N-9120D4N-9220D4N-9A20D4N-9B20
2-
conduit
Pg13.5D4N-5120D4N-5220D4N-5A20D4N-5B20
G1/2D4N-6120D4N-6220D4N-6A20D4N-6B20
M20D4N-8120D4N-8220D4N-8A20D4N-8B20
Roller lever
(metal lever,
resin roller)
1-
conduit
Pg13.5D4N-1122D4N-1222D4N-1A22D4N-1B22
G1/2D4N-2122D4N-2222D4N-2A22D4N-2B22
1/2-14NPTD4N-3122D4N-3222D4N-3A22D4N-3B22
M20D4N-4122D4N-4222D4N-4A22D4N-4B22
M12 connectorD4N-9122D4N-9222D4N-9A22D4N-9B22
2-
conduit
Pg13.5D4N-5122D4N-5222D4N-5A22D4N-5B22
G1/2D4N-6122D4N-6222D4N-6A22D4N-6B22
M20D4N-8122D4N-8222D4N-8A22D4N-8B22
Roller lever
(metal lever,
metal roller)
1-
conduit
Pg13.5D4N-1125D4N-1225D4N-1A25D4N-1B25
G1/2D4N-2125D4N-2225D4N-2A25D4N-2B25
1/2-14NPTD4N-3125D4N-3225D4N-3A25D4N-3B25
M20D4N-4125D4N-4225D4N-4A25D4N-4B25
M12 connectorD4N-9125D4N-9225D4N-9A25D4N-9B25
Roller lever
(metal lever,
bearing roller)
1-
conduit
Pg13.5D4N-1126D4N-1226D4N-1A26D4N-1B26
G1/2D4N-2126D4N-2226D4N-2A26D4N-2B26
1/2-14NPTD4N-3126D4N-3226D4N-3A26D4N-3B26
M20D4N-4126D4N-4226D4N-4A26D4N-4B26
M12 connectorD4N-9126D4N-9226D4N-9A26D4N-9B26
Plunger
1-
conduit
Pg13.5D4N-1131D4N-1231D4N-1A31D4N-1B31
G1/2D4N-2131D4N-2231D4N-2A31D4N-2B31
1/2-14NPTD4N-3131D4N-3231D4N-3A31D4N-3B31
M20D4N-4131D4N-4231D4N-4A31D4N-4B31
M12 connectorD4N-9131D4N-9231D4N-9A31D4N-9B31
2-
conduit
Pg13.5D4N-5131D4N-5231D4N-5A31D4N-5B31
G1/2D4N-6131D4N-6231D4N-6A31D4N-6B31
M20D4N-8131D4N-8231D4N-8A31D4N-8B31
Roller plunger
1-
conduit
Pg13.5D4N-1132D4N-1232D4N-1A32D4N-1B32
G1/2D4N-2132D4N-2232D4N-2A32D4N-2B32
1/2-14NPTD4N-3132D4N-3232D4N-3A32D4N-3B32
M20D4N-4132D4N-4232D4N-4A32D4N-4B32
M12 connectorD4N-9132D4N-9232D4N-9A32D4N-9B32
2-
conduit
Pg13.5D4N-5132D4N-5232D4N-5A32D4N-5B32
G1/2D4N-6132D4N-6232D4N-6A32D4N-6B32
M20D4N-8132D4N-8232D4N-8A32D4N-8B32
One-way
roller arm
lever
(horizontal)
1-
conduit
Pg13.5D4N-1162D4N-1262D4N-1A62D4N-1B62
G1/2D4N-2162D4N-2262D4N-2A62D4N-2B62
1/2-14NPTD4N-3162D4N-3262D4N-3A62D4N-3B62
M20D4N-4162D4N-4262D4N-4A62D4N-4B62
M12 connectorD4N-9162D4N-9262D4N-9A62D4N-9B62
2-
conduit
Pg13.5D4N-5162D4N-5262D4N-5A62D4N-5B62
G1/2D4N-6162D4N-6262D4N-6A62D4N-6B62
M20D4N-8162D4N-8262D4N-8A62D4N-8B62
One-way
roller arm
lever
(vertical)
1-
conduit
Pg13.5D4N-1172D4N-1272D4N-1A72D4N-1B72
G1/2D4N-2172D4N-2272D4N-2A72D4N-2B72
1/2-14NPTD4N-3172D4N-3272D4N-3A72D4N-3B72
M20D4N-4172D4N-4272D4N-4A72D4N-4B72
M12 connectorD4N-9172D4N-9272D4N-9A72D4N-9B72
2-
conduit
Pg13.5D4N-5172D4N-5272D4N-5A72D4N-5B72
G1/2D4N-6172D4N-6272D4N-6A72D4N-6B72
M20D4N-8172D4N-8272D4N-8A72D4N-8B72
Adjustable
roller lever,
form lock
(metal lever,
resin roller)
1-
conduit
Pg13.5D4N-112GD4N-122GD4N-1A2GD4N-1B2G
G1/2D4N-212GD4N-222GD4N-2A2GD4N-2B2G
1/2-14NPTD4N-312GD4N-322GD4N-3A2GD4N-3B2G
M20D4N-412GD4N-422GD4N-4A2GD4N-4B2G
M12 connectorD4N-912GD4N-922GD4N-9A2GD4N-9B2G
2-
conduit
G1/2D4N-612GD4N-622GD4N-6A2GD4N-6B2G
M20D4N-812GD4N-822GD4N-8A2GD4N-8B2G
Adjustable
roller lever,
form lock
(metal lever,
rubber roller)
1-
conduit
Pg13.5D4N-112HD4N-122HD4N-1A2HD4N-1B2H
G1/2D4N-212HD4N-222HD4N-2A2HD4N-2B2H
1/2-14NPTD4N-312HD4N-322HD4N-3A2HD4N-3B2H
M20D4N-412HD4N-422HD4N-4A2HD4N-4B2H
M12 connectorD4N-912HD4N-922HD4N-9A2HD4N-9B2H
2-
conduit
G1/2D4N-612HD4N-622HD4N-6A2HD4N-6B2H
M20D4N-812HD4N-822HD4N-8A2HD4N-8B2H

Note:It is recommended that M20 be used for Switches to be exported to Europe and 1/2-14NPT be used for Switches to be exported to North American countries.

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

ActuatorConduit sizeBuilt-in switch mechanism
2NC/1NO
(Slow-action)
3NC
(Slow-action)
1NC/1NO MBB
(Slow-action)
2NC/1NO MBB
(Slow-action)
ModelModelModelModel
Roller lever
(resin lever,
resin roller)
1-
conduit
Pg13.5D4N-1C20D4N-1D20D4N-1E20D4N-1F20
G1/2D4N-2C20D4N-2D20D4N-2E20D4N-2F20
1/2-14NPTD4N-3C20D4N-3D20D4N-3E20D4N-3F20
M20D4N-4C20D4N-4D20D4N-4E20D4N-4F20
M12 connector------D4N-9E20---
2-
conduit
Pg13.5D4N-5C20D4N-5D20D4N-5E20D4N-5F20
G1/2D4N-6C20D4N-6D20D4N-6E20D4N-6F20
M20D4N-8C20D4N-8D20D4N-8E20D4N-8F20
Roller lever
(metal lever,
resin roller)
1-
conduit
Pg13.5D4N-1C22D4N-1D22D4N-1E22D4N-1F22
G1/2D4N-2C22D4N-2D22D4N-2E22D4N-2F22
1/2-14NPTD4N-3C22D4N-3D22D4N-3E22D4N-3F22
M20D4N-4C22D4N-4D22D4N-4E22D4N-4F22
M12 connector------D4N-9E22---
2-
conduit
Pg13.5D4N-5C22D4N-5D22D4N-5E22D4N-5F22
G1/2D4N-6C22D4N-6D22D4N-6E22D4N-6F22
M20D4N-8C22D4N-8D22D4N-8E22D4N-8F22
Roller lever
(metal lever,
metal roller)
1-
conduit
Pg13.5D4N-1C25D4N-1D25D4N-1E25D4N-1F25
G1/2D4N-2C25D4N-2D25D4N-2E25D4N-2F25
1/2-14NPTD4N-3C25D4N-3D25D4N-3E25D4N-3F25
M20D4N-4C25D4N-4D25D4N-4E25D4N-4F25
M12 connector------D4N-9E25---
Roller lever
(metal lever,
bearing roller)
1-
conduit
Pg13.5D4N-1C26D4N-1D26D4N-1E26D4N-1F26
G1/2D4N-2C26D4N-2D26D4N-2E26D4N-2F26
1/2-14NPTD4N-3C26D4N-3D26D4N-3E26D4N-3F26
M20D4N-4C26D4N-4D26D4N-4E26D4N-4F26
M12 connector------D4N-9E26---
Plunger
1-
conduit
Pg13.5D4N-1C31D4N-1D31D4N-1E31D4N-1F31
G1/2D4N-2C31D4N-2D31D4N-2E31D4N-2F31
1/2-14NPTD4N-3C31D4N-3D31D4N-3E31D4N-3F31
M20D4N-4C31D4N-4D31D4N-4E31D4N-4F31
M12 connector------D4N-9E31---
2-
conduit
Pg13.5D4N-5C31D4N-5D31D4N-5E31D4N-5F31
G1/2D4N-6C31D4N-6D31D4N-6E31D4N-6F31
M20D4N-8C31D4N-8D31D4N-8E31D4N-8F31
Roller plunger
1-
conduit
Pg13.5D4N-1C32D4N-1D32D4N-1E32D4N-1F32
G1/2D4N-2C32D4N-2D32D4N-2E32D4N-2F32
1/2-14NPTD4N-3C32D4N-3D32D4N-3E32D4N-3F32
M20D4N-4C32D4N-4D32D4N-4E32D4N-4F32
M12 connector------D4N-9E32---
2-
conduit
Pg13.5D4N-5C32D4N-5D32D4N-5E32D4N-5F32
G1/2D4N-6C32D4N-6D32D4N-6E32D4N-6F32
M20D4N-8C32D4N-8D32D4N-8E32D4N-8F32
One-way
roller arm
lever
(horizontal)
1-
conduit
Pg13.5D4N-1C62D4N-1D62D4N-1E62D4N-1F62
G1/2D4N-2C62D4N-2D62D4N-2E62D4N-2F62
1/2-14NPTD4N-3C62D4N-3D62D4N-3E62D4N-3F62
M20D4N-4C62D4N-4D62D4N-4E62D4N-4F62
M12 connector------D4N-9E62---
2-
conduit
Pg13.5D4N-5C62D4N-5D62D4N-5E62D4N-5F62
G1/2D4N-6C62D4N-6D62D4N-6E62D4N-6F62
M20D4N-8C62D4N-8D62D4N-8E62D4N-8F62
One-way
roller arm
lever
(vertical)
1-
conduit
Pg13.5D4N-1C72D4N-1D72D4N-1E72D4N-1F72
G1/2D4N-2C72D4N-2D72D4N-2E72D4N-2F72
1/2-14NPTD4N-3C72D4N-3D72D4N-3E72D4N-3F72
M20D4N-4C72D4N-4D72D4N-4E72D4N-4F72
M12 connector------D4N-9E72---
2-
conduit
Pg13.5D4N-5C72D4N-5D72D4N-5E72D4N-5F72
G1/2D4N-6C72D4N-6D72D4N-6E72D4N-6F72
M20D4N-8C72D4N-8D72D4N-8E72D4N-8F72
Adjustable
roller lever,
form lock
(metal lever,
resin roller)
1-
conduit
Pg13.5D4N-1C2GD4N-1D2GD4N-1E2GD4N-1F2G
G1/2D4N-2C2GD4N-2D2GD4N-2E2GD4N-2F2G
1/2-14NPTD4N-3C2GD4N-3D2GD4N-3E2GD4N-3F2G
M20D4N-4C2GD4N-4D2GD4N-4E2GD4N-4F2G
M12 connector------D4N-9E2G---
2-
conduit
G1/2D4N-6C2GD4N-6D2GD4N-6E2GD4N-6F2G
M20D4N-8C2GD4N-8D2GD4N-8E2GD4N-8F2G
Adjustable
roller lever,
form lock
(metal lever,
rubber roller)
1-
conduit
Pg13.5D4N-1C2HD4N-1D2HD4N-1E2HD4N-1F2H
G1/2D4N-2C2HD4N-2D2HD4N-2E2HD4N-2F2H
1/2-14NPTD4N-3C2HD4N-3D2HD4N-3E2HD4N-3F2H
M20D4N-4C2HD4N-4D2HD4N-4E2HD4N-4F2H
M12 connector------D4N-9E2H---
2-
conduit
G1/2D4N-6C2HD4N-6D2HD4N-6E2HD4N-6F2H
M20D4N-8C2HD4N-8D2HD4N-8E2HD4N-8F2H

Note:It is recommended that M20 be used for Switches to be exported to Europe and 1/2-14NPT be used for Switches to be exported to North American countries.

General-purpose Switches with Two Contacts

ActuatorConduit sizeBuilt-in switch mechanism
1NC/1NO
(Snap-action)
2NC
(Snap-action)
1NC/1NO
(Slow-action)
2NC
(Slow-action)
ModelModelModelModel
Fork lever
lock (right
operation)
1-
conduit
G1/2------D4N-2ARED4N-2BRE
1/2-14NPTD4N-3ARED4N-3BRE
M20D4N-4ARED4N-4BRE
2-
conduit
G1/2D4N-6ARED4N-6BRE
M20D4N-8ARED4N-8BRE
Fork lever
lock (left
operation)
1-
conduit
G1/2D4N-2ALED4N-2BLE
1/2-14NPTD4N-3ALED4N-3BLE
M20D4N-4ALED4N-4BLE
2-
conduit
G1/2D4N-6ALED4N-6BLE
M20D4N-8ALED4N-8BLE
Cat whisker
1-
conduit
G1/2D4N-2180D4N-2280---D4N-2B80
1/2-14NPTD4N-3180D4N-3280D4N-3B80
M20D4N-4180D4N-4280D4N-4B80
2-
conduit
G1/2D4N-6180D4N-6280D4N-6B80
M20D4N-8180D4N-8280D4N-8B80
Plastic rod
1-
conduit
G1/2D4N-2187D4N-2287D4N-2B87
1/2-14NPTD4N-3187D4N-3287D4N-3B87
M20D4N-4187D4N-4287D4N-4B87
2-
conduit
G1/2D4N-6187D4N-6287D4N-6B87
M20D4N-8187D4N-8287D4N-8B87

Note:

1.It is recommended that M20 be used for Switches to be exported to Europe and 1/2-14NPT be used for Switches to be exported to North American countries.

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

General-purpose Switches with Three Contacts and MBB Contacts

ActuatorConduit sizeBuilt-in switch mechanism
2NC/1NO
(Slow-action)
3NC
(Slow-action)
1NC/1NO MBB
(Slow-action)
2NC/1NO MBB
(Slow-action)
ModelModelModelModel
Fork lever
lock (right
operation)
1-
conduit
G1/2D4N-2CRED4N-2DRED4N-2ERED4N-2FRE
1/2-14NPTD4N-3CRED4N-3DRED4N-3ERED4N-3FRE
M20D4N-4CRED4N-4DRED4N-4ERED4N-4FRE
2-
conduit
G1/2D4N-6CRED4N-6DRED4N-6ERED4N-6FRE
M20D4N-8CRED4N-8DRED4N-8ERED4N-8FRE
Fork lever
lock (left
operation)
1-
conduit
G1/2D4N-2CLED4N-2DLED4N-2ELED4N-2FLE
1/2-14NPTD4N-3CLED4N-3DLED4N-3ELED4N-3FLE
M20D4N-4CLED4N-4DLED4N-4ELED4N-4FLE
2-
conduit
G1/2D4N-6CLED4N-6DLED4N-6ELED4N-6FLE
M20D4N-8CLED4N-8DLED4N-8ELED4N-8FLE
Cat whisker
1-
conduit
G1/2---D4N-2D80------
1/2-14NPTD4N-3D80
M20D4N-4D80
2-
conduit
G1/2D4N-6D80
M20D4N-8D80
Plastic rod
1-
conduit
G1/2D4N-2D87
1/2-14NPTD4N-3D87
M20D4N-4D87
2-
conduit
G1/2D4N-6D87
M20D4N-8D87

Note:

1.It is recommended that M20 be used for Switches to be exported to Europe and 1/2-14NPT be used for Switches to be exported to North American countries.

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