Omron D4BS-45FS Safety Door Switch
Omron D4BS-45FS is an M20 1-conduit safety door switch designed for monitoring movable guards and protective machine doors. A Type 2 low-level coded interlock provides mechanical guard-position detection, while the direct opening mechanism supports positive contact separation when the associated door is operated. The switch provides IP67 enclosure protection and supports operating speeds from 0.1 to 0.5 m/s. Its direct opening mechanism provides 19.61 N minimum force with 20 mm minimum travel, while the M20 conduit outlet defines its cable-entry arrangement for machine installations. The D4BS-45FS belongs to the D4BS series within the safety door switch range from Omron industrial safety products.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4BS-45FS |
Omron D4BS-45FS Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | 1-conduit type |
| Conduit outlet/Connector | M20 |
| 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 Safety Door Switch uses a 1-conduit construction with an M20 conduit outlet for protective-door monitoring. Its 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 machine guard is operated.
Electrical characteristics 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, and rated frequency is 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 ambient operating temperature extends from −40 to 80°C, with operating humidity up to 95%. The M20 conduit outlet distinguishes this configuration while retaining the D4BS mechanical and electrical characteristics stated for guard-position monitoring. For applications requiring a different conduit thread while maintaining the same supplied primary performance ratings, the D4BS-45FS-NPT provides the closely related 1/2-14NPT configuration.
