OMRON D4NL — Safety Door Switches
Omron D4NL: guard lock safety-door switch; 1,300 N holding force, 4 or 5 contacts, 24 VDC or 110 VAC solenoid, IP67.
Status: In production
Brand: Omron
Product: Guard lock safety-door switch
Holding force (Fzh): 1,300 N min.
Interlock type: Type 2, low level coded (EN ISO 14119)
Lock / release: Mechanical lock or solenoid lock
Degree of protection: IP67 (EN60947-5-1)
Ambient operating temperature: -10 to 55 °C (no icing)
Omron D4NL is a guard lock safety-door switch in a plastic housing. A door open/closed detection switch and a lock monitor switch are built into one body, and models are available with four or five contacts. When locked, the key holding force is 1,300 N min. Mechanical lock / solenoid release and solenoid lock / mechanical release types are combined with Pg13.5, G1/2 or M20 conduit outlets. The key insertion direction is selectable, mounting is adjustable, and the D4DS-K series keys are shared with D4NS.
According to the datasheet, in mechanical lock models the key is locked by the lock spring when inserted, and the door stays locked even if power is interrupted; in solenoid lock models the door is locked only while the solenoid is energized and unlocks on power interruption. D4NL is a Type 2 interlocking device to EN ISO 14119. The solenoid draws approx. 200 mA at 24 VDC and approx. 50 mA at 110 VAC; the orange LED indicator operates at 10 to 115 VAC/VDC. Mechanical durability is 1,000,000 operations min., and the operating temperature is -10 to 55 °C.
Omron D4NL technical specifications
| General | |
|---|---|
| Switch type | Guard lock safety-door switch, key-operated |
| Housing / head material | Plastic / plastic |
| Number of contacts | 4 or 5 (door monitor + lock monitor) |
| Conformity | EN ISO 14119, EN60947-5-1 |
| Certifications | TÜV SÜD, UL508, CSA C22.2 No. 14, CQC, KOSHA |
| Safety ratings | |
| Interlock type / coding level | Type 2 / low level coded (EN ISO 14119) |
| Holding force (Fzh) | 1,300 N min. (EN ISO 14119) |
| Direct opening force / travel | 60 N min. / 10 mm min. |
| Electrical characteristics | |
| Rating AC-15 / DC-13 | 3 A, 240 V / 0.27 A, 250 V |
| Conventional free air thermal current (Ith) | 10 A |
| Solenoid voltage | 24 VDC or 110 VAC (100% ED) |
| Solenoid current consumption | approx. 200 mA (24 VDC) / approx. 50 mA (110 VAC) |
| LED indicator | Orange, 10 to 115 VAC/VDC, leakage current approx. 1 mA |
| Rated insulation voltage (Ui) | 300 V |
| Contact resistance | 25 mΩ max. per contact |
| Minimum applicable load | 1 mA resistive load at 5 VDC |
| Mechanical and connection | |
| Mechanical durability | 1,000,000 operations min. |
| Electrical durability | 500,000 operations min. (250 VAC, 3 A resistive) |
| Operating speed / frequency | 0.05 to 0.5 m/s / 30 operations/minute max. |
| Weight | approx. 370 g (D4NL-1AFA-B) |
| Environmental | |
| Degree of protection | IP67 (EN60947-5-1) |
| Ambient operating temperature | -10 to 55 °C (no icing) |
| Ambient operating humidity | 95% max. |
| Shock resistance (destruction / malfunction) | 1,000 m/s2 min. / 100 m/s2 min. |
Omron D4NL models
| Model | Contacts (door + lock monitor) | Lock / release | Solenoid | Conduit outlet |
|---|---|---|---|---|
| D4NL-1AFA-B | 1NC/1NO + 1NC/1NO | Mechanical lock / solenoid release | 24 VDC | Pg13.5 |
| D4NL-1AFB-B | 1NC/1NO + 1NC/1NO | Mechanical lock / solenoid release | 110 VAC | Pg13.5 |
| D4NL-1AFG-B | 1NC/1NO + 1NC/1NO | Solenoid lock / mechanical release | 24 VDC | Pg13.5 |
| D4NL-1CFA-B | 2NC + 1NC/1NO | Mechanical lock / solenoid release | 24 VDC | Pg13.5 |
| D4NL-1CFG-B | 2NC + 1NC/1NO | Solenoid lock / mechanical release | 24 VDC | Pg13.5 |
| D4NL-1DFA-B | 2NC + 2NC | Mechanical lock / solenoid release | 24 VDC | Pg13.5 |
| D4NL-1HFG-B | 3NC + 2NC | Solenoid lock / mechanical release | 24 VDC | Pg13.5 |
| D4NL-2DFA-B | 2NC + 2NC | Mechanical lock / solenoid release | 24 VDC | G1/2 |
| D4NL-4AFA-B | 1NC/1NO + 1NC/1NO | Mechanical lock / solenoid release | 24 VDC | M20 |
| D4NL-4AFB-B | 1NC/1NO + 1NC/1NO | Mechanical lock / solenoid release | 110 VAC | M20 |
| D4NL-4AFG-B | 1NC/1NO + 1NC/1NO | Solenoid lock / mechanical release | 24 VDC | M20 |
| D4NL-4CFA-B | 2NC + 1NC/1NO | Mechanical lock / solenoid release | 24 VDC | M20 |
| D4NL-4DFA-B | 2NC + 2NC | Mechanical lock / solenoid release | 24 VDC | M20 |
| D4NL-4DFG-B | 2NC + 2NC | Solenoid lock / mechanical release | 24 VDC | M20 |
| D4NL-4FFA-B | 2NC/1NO + 2NC | Mechanical lock / solenoid release | 24 VDC | M20 |
Key features
- Key holding force of 1,300 N min.
- Models with four or five contacts (door monitor + lock monitor)
- Mechanical lock or solenoid lock versions, 24 VDC or 110 VAC solenoid
- Contacts suitable for standard loads and microloads
- Selectable key insertion direction, adjustable mounting and IP67 protection
D4NL ordering codes
| Part number | Description |
|---|---|
| D4NL-1AFA-B | 1NC/1NO + 1NC/1NO, mechanical lock / solenoid release, solenoid 24 VDC, Pg13.5, plastic head, LED indicator |
| D4NL-1AFB-B | 1NC/1NO + 1NC/1NO, mechanical lock / solenoid release, solenoid 110 VAC, Pg13.5, plastic head, LED indicator |
| D4NL-1AFG-B | 1NC/1NO + 1NC/1NO, solenoid lock / mechanical release, solenoid 24 VDC, Pg13.5, plastic head, LED indicator |
| D4NL-1CFA-B | 2NC + 1NC/1NO, mechanical lock / solenoid release, solenoid 24 VDC, Pg13.5, plastic head, LED indicator |
| D4NL-1CFG-B | 2NC + 1NC/1NO, solenoid lock / mechanical release, solenoid 24 VDC, Pg13.5, plastic head, LED indicator |
| D4NL-1DFA-B | 2NC + 2NC, mechanical lock / solenoid release, solenoid 24 VDC, Pg13.5, plastic head, LED indicator |
| D4NL-1HFG-B | 3NC + 2NC, solenoid lock / mechanical release, solenoid 24 VDC, Pg13.5, plastic head, LED indicator |
| D4NL-2DFA-B | 2NC + 2NC, mechanical lock / solenoid release, solenoid 24 VDC, G1/2, plastic head, LED indicator |
| D4NL-4AFA-B | 1NC/1NO + 1NC/1NO, mechanical lock / solenoid release, solenoid 24 VDC, M20, plastic head, LED indicator |
| D4NL-4AFB-B | 1NC/1NO + 1NC/1NO, mechanical lock / solenoid release, solenoid 110 VAC, M20, plastic head, LED indicator |
| D4NL-4AFG-B | 1NC/1NO + 1NC/1NO, solenoid lock / mechanical release, solenoid 24 VDC, M20, plastic head, LED indicator |
| D4NL-4CFA-B | 2NC + 1NC/1NO, mechanical lock / solenoid release, solenoid 24 VDC, M20, plastic head, LED indicator |
| D4NL-4DFA-B | 2NC + 2NC, mechanical lock / solenoid release, solenoid 24 VDC, M20, plastic head, LED indicator |
| D4NL-4DFG-B | 2NC + 2NC, solenoid lock / mechanical release, solenoid 24 VDC, M20, plastic head, LED indicator |
| D4NL-4FFA-B | 2NC/1NO + 2NC, mechanical lock / solenoid release, solenoid 24 VDC, M20, plastic head, LED indicator |
D4NL accessories
Accessories listed by the manufacturer for this product (ordered separately):
| Part number | Description |
|---|---|
| D4DS-K1 | Operation key, horizontal mounting |
| D4DS-K2 | Operation key, vertical mounting |
| D4DS-K3 | Operation key, adjustable mounting (horizontal) |
| D4DS-K5 | Operation key, adjustable mounting (horizontal/vertical) |
Other Omron Safety Door Switches
- OMRON D4NS — Safety-door switch (plastic housing, key-operated)
- OMRON D4GS-N — Slim safety door switch (pre-wired cable, key-operated)
- OMRON D4BS — Safety-door switch (metal housing, key-operated)
- OMRON D4SL-N — Guard lock safety-door switch, 4/5/6 contacts
- OMRON D41L — Hygienic high-coded RFID guard lock safety door switch
- OMRON D41G — High-coded RFID guard lock safety door switch for gates
Models from other brands: Safety Door Switches
Is this safety switch right for your application?
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All product specifications are subject to change without notice. Validation of the safety function and the risk assessment remain the responsibility of the machine builder. Source: Omron, industrial.omron.eu/en/products/d4nl and model pages D4NL-1AFA-B, D4NL-1AFB-B, D4NL-1AFG-B; D4NL Guard Lock Safety-door Switch datasheet (CSM_D4NL_DS_E_9_9, 2024.11) (accessed 25 September 2026).