OMRON D40ML — Non-Contact Safety Switches
Omron D40ML: RFID magnetic locking safety switch; 600–1500 N holding force, PL e / Category 4, SIL 3, IP67 / IP69K.
Status: In production
Brand: Omron
Product: RFID magnetic locking safety switch (Type 4 coding, PL e)
Safety level: PL e / Category 4 (EN ISO 13849-1), SIL 3 (IEC 62061)
Holding force F1max (typical): 600 N, 900 N, 950 N, 1500 N (by model)
Actuator coding: Basic (all actuators identical) or unique (32,000,000 codes)
Housing: Plastic, die-cast metal or 316 stainless steel
Series connection: Up to 20 switches
The Omron D40ML series combines magnetic latching with RFID technology to deliver high holding force and tamper resistance. The lock engages when the solenoid is powered and releases when power is removed, so it is intended for machines with no rundown time if power is lost. With basic actuators all actuators in the system are identically coded; with unique actuators every actuator is individually coded, with 32,000,000 codes. Both types use Type 4 coding according to EN ISO 14119. PL e / Category 4 is achieved when both channels are used with a SIL 3 / PL e control device.
The series offers two switch sizes and three housing materials. Medium-duty versions hold 600 N in stainless steel and 900 N in plastic and die-cast metal; heavy-duty versions hold 950 N in stainless steel and 1500 N in plastic and die-cast metal (F1max, typical). Stainless steel versions with flying leads are rated IP69K, the others IP67. A green LED indicates closed and locked, a yellow LED indicates open. Supply is 24 V DC ±10% and the operating temperature range is −25 to 40 °C. Residual magnetism acts as a light door latch after unlocking, and up to 20 switches can be installed in series.
Omron D40ML technical specifications
| General | |
|---|---|
| Locking principle | Power to lock (magnetic) |
| Codes and standards | IEC 60947-5-3, EN 60947-5-1, EN ISO 13849-1, EN 62061, ISO 14119, UL508 |
| Safety ratings | |
| Performance level / category | PL e / Category 4, MTTFd 1100 years, DC 99% |
| SIL / PFH / PFD | SIL 3 / 4.77 × 10^-10 1/h / 4.18 × 10^-5 |
| Proof test interval | 20 years |
| Risk time (EN 60947-5-3) | 150 ms |
| Detection | |
| Switching distance | Sao 1 mm close, Sar 10 mm open |
| Misalignment | 2 mm in any direction |
| Response time (ON→OFF) / operating time | 10 ms max. / 150 ms |
| Switching frequency | 1.0 Hz max. |
| Electrical characteristics | |
| Power supply | 24 V DC ±10% (SELV / PELV) |
| Power consumption | Unlocked 50 mA max.; locked: medium duty 325 mA max., heavy duty 500 mA max. |
| Max. switched current (outputs) | 200 mA max. |
| Auxiliary signal | +24 V DC (door open) |
| Cable | PVC, 8-core, 6 mm outer diameter |
| Environmental | |
| Operating temperature | −25 to 40 °C |
| Ambient operating humidity | Up to 90% at 25 to 40 °C |
| Enclosure protection | IP67 (plastic or die-cast metal); IP69K (stainless steel versions with flying leads) |
| Shock / vibration resistance | 30 g, 11 ms / 10 to 55 Hz, 1 mm amplitude |
| Mechanical and connection | |
| Body material | D40ML-P: plastic; D40ML-M: die-cast metal; D40ML-SS: 316 stainless steel |
| Holding force Fzh | Medium duty: 450 N (stainless), 675 N (plastic / die-cast); heavy duty: 700 N (stainless), 1150 N (plastic / die-cast) |
| Mounting | 2 × M5 bolts, tightening torque 1.0 N·m; any position |
Omron D40ML models
| Code | Housing | Holding force F1max | Actuator code | Connection | Protection |
|---|---|---|---|---|---|
| D40ML-M1-U-5M | Die-cast metal | 1500 N | Unique | 5 m cable | IP67 |
| D40ML-M2-B-5M | Die-cast metal | 900 N | Basic | 5 m cable | IP67 |
| D40ML-M2-U-M12 | Die-cast metal | 900 N | Unique | 0.25 m pigtail + M12 connector | IP67 |
| D40ML-P2-B-5M | Plastic | 900 N | Basic | 5 m cable | IP67 |
| D40ML-P2-B-10M | Plastic | 900 N | Basic | 10 m cable | IP67 |
| D40ML-P2-B-M12 | Plastic | 900 N | Basic | 0.25 m pigtail + M12 connector | IP67 |
| D40ML-P2-U-5M | Plastic | 900 N | Unique | 5 m cable | IP67 |
| D40ML-P2-U-10M | Plastic | 900 N | Unique | 10 m cable | IP67 |
| D40ML-P2-U-M12 | Plastic | 900 N | Unique | 0.25 m pigtail + M12 connector | IP67 |
| D40ML-SS1-U-M12 | 316 stainless steel | 950 N | Unique | 0.25 m pigtail + M12 connector | IP67 |
| D40ML-SS2-B-5M | 316 stainless steel | 600 N | Basic | 5 m cable | IP69K |
| D40ML-SS2-B-10M | 316 stainless steel | 600 N | Basic | 10 m cable | IP69K |
| D40ML-SS2-B-M12 | 316 stainless steel | 600 N | Basic | 0.25 m pigtail + M12 connector | IP67 |
| D40ML-SS2-U-5M | 316 stainless steel | 600 N | Unique | 5 m cable | IP69K |
| D40ML-SS2-U-10M | 316 stainless steel | 600 N | Unique | 10 m cable | IP69K |
Key features
- High tamper resistance with RFID coding
- IP69K on stainless steel versions; suitable for clean and sanitize in place
- Easy fault diagnosis with LEDs
- Up to 20 switches in series
- Basic and unique actuator types with Type 4 coding
- Two switch sizes, three housing materials, 600–1500 N holding force
D40ML ordering codes
| Part number | Description |
|---|---|
| D40ML-M1-U-5M | RFID magnetic locking safety switch, die-cast metal, 1500 N, unique actuator code, 5 m cable |
| D40ML-M2-B-5M | RFID magnetic locking safety switch, die-cast metal, 900 N, basic actuator code, 5 m cable |
| D40ML-M2-U-M12 | RFID magnetic locking safety switch, die-cast metal, 900 N, unique actuator code, 0.25 m pigtail + M12 connector |
| D40ML-P2-B-5M | RFID magnetic locking safety switch, plastic, 900 N, basic actuator code, 5 m cable |
| D40ML-P2-B-10M | RFID magnetic locking safety switch, plastic, 900 N, basic actuator code, 10 m cable |
| D40ML-P2-B-M12 | RFID magnetic locking safety switch, plastic, 900 N, basic actuator code, 0.25 m pigtail + M12 connector |
| D40ML-P2-U-5M | RFID magnetic locking safety switch, plastic, 900 N, unique actuator code, 5 m cable |
| D40ML-P2-U-10M | RFID magnetic locking safety switch, plastic, 900 N, unique actuator code, 10 m cable |
| D40ML-P2-U-M12 | RFID magnetic locking safety switch, plastic, 900 N, unique actuator code, 0.25 m pigtail + M12 connector |
| D40ML-SS1-U-M12 | RFID magnetic locking safety switch, 316 stainless steel, 950 N, unique actuator code, 0.25 m pigtail + M12 connector |
| D40ML-SS2-B-5M | RFID magnetic locking safety switch, 316 stainless steel, 600 N, basic actuator code, 5 m cable |
| D40ML-SS2-B-10M | RFID magnetic locking safety switch, 316 stainless steel, 600 N, basic actuator code, 10 m cable |
| D40ML-SS2-B-M12 | RFID magnetic locking safety switch, 316 stainless steel, 600 N, basic actuator code, 0.25 m pigtail + M12 connector |
| D40ML-SS2-U-5M | RFID magnetic locking safety switch, 316 stainless steel, 600 N, unique actuator code, 5 m cable |
| D40ML-SS2-U-10M | RFID magnetic locking safety switch, 316 stainless steel, 600 N, unique actuator code, 10 m cable |
D40ML accessories
Accessories listed by the manufacturer for this product (ordered separately):
| Part number | Description |
|---|---|
| D40ML-CBL-M12-5M | Quick disconnect cable, 8-pin M12 to flying leads, PVC jacket, 5 m |
| D40ML-CBL-M12-10M | Quick disconnect cable, 8-pin M12 to flying leads, PVC jacket, 10 m |
| D40ML-SS1-B-ACT | Spare actuator, 316 stainless steel, IP69K, 950 N, basic code |
| D40ML-SS2-B-ACT | Spare actuator, 316 stainless steel, IP69K, 600 N, basic code |
| D40ML-M1-B-ACT | Spare actuator, die-cast metal, IP67, 1500 N, basic code |
| D40ML-M2-B-ACT | Spare actuator, die-cast metal, IP67, 900 N, basic code |
| D40ML-P1-B-ACT | Spare actuator, plastic, IP67, 1500 N, basic code |
| D40ML-P2-B-ACT | Spare actuator, plastic, IP67, 900 N, basic code |
Other Omron Non-Contact Safety Switches
- OMRON D40A — Non-contact safety door switch (Type 4, low-level coded)
- OMRON D41D — High-coded RFID non-contact safety door switch (Type 4, PL e)
Models from other brands: Non-Contact Safety Switches
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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/d40ml and model pages; D40ML Series datasheet, Cat. No. F22E-EN-01C (accessed 25 September 2026).