Omron D4GS-NK4 Safety Door Switch
Omron D4GS-NK4 is an adjustable-mount safety door switch designed for protective guard monitoring where actuator positioning requires installation flexibility. Its adjustable mounting arrangement supports alignment around machine doors and movable guards, while a Type 2 low-level coded interlock provides mechanical guard-position detection. The direct opening mechanism provides 60 N minimum force with 10 mm minimum travel, and the switch supports operating speeds from 0.1 to 0.5 m/s. IP67 protection suits industrial machine safety installations exposed to dust or moisture. The D4GS-NK4 belongs to the D4GS Series within the slim safety door switch range from Omron machine safety products, supporting compact guard-position and protective-door monitoring.
| Brand | Omron |
| Product Type | Safety Door Switch |
| Model Number | D4GS-NK4 |
Omron D4GS-NK4 Safety Door Switch - Technical Specifications
| Specification | Value |
|---|---|
| Type | Adjustable mounting |
| Interlock type | Type 2 |
| Coding level | Low level coded |
| Degree of protection | IP67 |
| Operating speed | 0.1 to 0.5 m/s |
| Direct opening force | 60 N min |
| Direct opening travel | 10 mm min |
| Contact resistance | 300 mΩ max. (with 1 m cable) ; 500 mΩ max. (with 3 m cable); 700 mΩ max. (with 5 m cable) |
| Rated insulation voltage (Ui) | 250 V |
| Rated frequency | 50/60 Hz |
| Insulation resistance | 100 MΩ min. |
| Contact gap | 2 × 2 mm min |
| Vibration resistance | Malfunction 10 to 55 Hz, 0.35 mm single amplitude |
| Shock resistance | Destruction: 1,000 m/s2 min. Malfunction: 300 m/s2 min |
| Ambient operating temperature | −30 to 70°C (with no icing) |
| Ambient operating humidity | 95% max |
| Cable | UL2464 No. 22 AWG, finishing O.D.: 7.2 mm |
| Weight | Approx. 120 g |
The Omron D4GS-NK4 Safety Door Switch uses an adjustable mounting arrangement for protective-door and machine-guard monitoring. This mounting design supports actuator alignment where the position of the movable guard requires installation flexibility. A Type 2 low-level coded interlock provides mechanical guard-position detection, while the direct opening mechanism supports positive contact separation when the protective door is operated. The switch provides 60 N minimum direct opening force with 10 mm minimum travel and supports operating speeds from 0.1 to 0.5 m/s. IP67 protection supports use around industrial machinery where dust or moisture may be present. The important semantic relationships for this model are adjustable mounting, slim safety door switching, protective guard detection, direct opening operation and machine safety monitoring. These functional characteristics describe the product more clearly than secondary values such as contact resistance, cable resistance or weight. The adjustable mounting feature is especially useful for distinguishing the D4GS-NK4 from fixed mounting variants within the same safety switch family. Its mechanical interlock links guard movement to the associated safety control system, providing a defined protective-door status. For another mounting-key option within the D4GS product family, the D4GS-NK2 provides a relevant related model for comparison.
