Omron D4BS-45FS-NPT Safety Door Switch
Omron D4BS-45FS-NPT is a 1-conduit safety door switch with a 1/2-14NPT conduit outlet for protective-door monitoring on industrial machinery. Its Type 2 low-level coded interlock provides mechanical guard-position detection, while the direct opening mechanism supports positive contact separation when the associated guard is operated. The switch provides IP67 enclosure protection and operates at speeds from 0.1 to 0.5 m/s. A 19.61 N minimum direct opening force and 20 mm minimum travel define its mechanical opening characteristics, while the NPT outlet provides its connection arrangement. The D4BS-45FS-NPT belongs to the D4BS series within the industrial safety door switch range from Omron machine safety products.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4BS-45FS-NPT |
Omron D4BS-45FS-NPT Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 1-conduit type |
| Conduit outlet/Connector | 1/2-14NPT |
| Interlock type | Type 2 |
| Coding level | Low level coded |
| Degree of protection | IP67 |
| Operating speed | 0.1 m/s to 0.5 m/s |
| Direct opening force | 19.61 N min |
| Direct opening travel | 20 mm min |
| Contact resistance | 25 mΩ max. |
| Rated insulation voltage (Ui) | 600 V |
| Rated frequency | 50/60 Hz |
| Insulation resistance | 100 MΩ min. |
| Contact gap | 2 × 2 mm min |
| Vibration resistance | Malfunction 10 to 55 Hz, 0.65 mm single amplitude |
| Shock resistance | Destruction: 1,000 m/s2 min. Malfunction: 300 m/s2 min |
| Ambient operating temperature | −40 to 80°C |
| Ambient operating humidity | 95% max |
| Weight | Approx. 285 g |
The Omron D4BS-45FS-NPT Safety Door Switch uses a 1-conduit construction with a 1/2-14NPT conduit outlet for protective-door monitoring. A Type 2 low-level coded interlock provides mechanical guard-position detection, while IP67 enclosure protection supports industrial machine installations. The switch operates at speeds from 0.1 to 0.5 m/s. Its direct opening mechanism provides 19.61 N minimum force with 20 mm minimum travel, supporting positive mechanical contact separation when the associated protective guard is operated.
Electrical ratings include 25 mΩ maximum contact resistance, a 600 V rated insulation voltage and 100 MΩ minimum insulation resistance. The minimum contact gap is 2 × 2 mm, with a rated frequency of 50/60 Hz. Malfunction vibration resistance covers 10 to 55 Hz at 0.65 mm single amplitude. Shock resistance reaches 1,000 m/s² minimum for destruction and 300 m/s² minimum for malfunction. The specified operating temperature extends from −40 to 80°C, ambient humidity is rated up to 95%. The 1/2-14NPT connection distinguishes this model within the D4BS safety door switch family while retaining its stated operating and electrical characteristics. Where an M20 conduit outlet is required instead, the D4BS-45FS provides the closest related configuration with the same supplied primary performance specifications.
