Technical Parameter
| Parameter of safety door switch | ||
| Electromagnetic tube | ||
| Rated Voltage | DC24V | |
| Capacity | 4.8W | |
| Rated current | Approximate 200mA | |
| Insulation | Class B (130°C） | |
| LED indicator | ||
| Rated voltage | DC24V | |
| Rated current | Approximate 1mA | |
| Luminous color (LED) | Green | |
| Safety level | PL d (ISO 13849-1) | |
| Certificate | CE TUV | |
| Standard | EN 60947-5-1、IEC 60947-5-1、GB/T1 4048.5、EN ISO 14119、GB/T 18831 | |
| Protection rate | IP67 | |
| Material | PA66 fire retardant | |
| Mechanical lifespan | Over 1,000,000 times | |
| Electrical lifespan | Over 150, 000 times (AC 240V 3A, resistive load) | |
| Using Type | AC-15 | DC-13 |
| Rated operating voltage(Ue) | 240V | 24V |
| Rated operating current(Ie) | 3A | 2A |
| Electrical parameter | ||
| Contact resistance | <200mΩ | |
| Nominal discharge current (lth) | 10A | |
| Rated insulation voltage (Ui) | 300V | |
| Anti-electric shock level | Class II (double insulation) | |
| Pulse withstand voltage (EN60947-5-1) | 2.5kv | |
| Insulation resistance | >100mΩ | |
| Short-circuit protection | 10A, 250V requires a quick-break fuse | |
| Vibration resistance | 10-55HZ, double amplitude 1.5mm | |
| Compact resistance | Durability 1000m/s² | |
| Conditional short-circuit current | 100A (EN 60947-5-1) | |
| Space of contact | Above 2 *2mm | |
| Action characteristic | ||
| Direct opening force | Min. 60N | |
| Direct opening travel | Over 10mm | |
| Allowed operating speed | 0.1m/s-0.5m/s | |
| Allowed operating frequency | Maximum 30 times/minute | |
| Holding force | 1300N | |
| Environment | ||
| Operating environment | 3 (EN 60947-5-1) | |
| Operating temperature | -10°C ~ 55°C ( no freezing) | |
| Operating humidity | <95% RH | |
Product Size
Explanation Model (example: SLM21-BPMF2)
Structure And Action
Below wire diagram for switch with key inserts & lock status. (Terminal 12 &41, 22&51, 32&61 is inside connection)
Product installation
| Releasing the 4 screws on top of the cap, spinning the direction of top cap until the suitable position for key inserting |  |
| When install on side hung door, it should be over than semidiameter. |  |
| Please install the safety switch door and insertion key under range 1-3.5mm. |  |
| The installation of operation key allows ±1mm error within the key insertion center of the hole. |  |
Top release(Plastic)
Magnetic voltage/ indicator | Lock/Release method | Contact type (door monitor + lock monitor) | Connector size | Model |
Electromagnetic DC24V Green LED | Power to release | 1NC/1NO+1NC/1NO | M20 | SLM21-APMT2 |
| 1NC/1NO+2NC | M20 | SLM21-BPMT2 | ||
| 2NC+1NC/1NO | M20 | SLM21-CPMT2 | ||
| 2NC+2NC | M20 | SLM21-DPMT2 | ||
| 2NC/1NO+1NC/1NO | M20 | SLM21-EPMT2 | ||
| 2NC/1NO+2NC | M20 | SLM21-FPMT2 | ||
| 2NC/1NO+2NC/1NO | M20 | SLM21-GPMT2 | ||
| 3NC+1NC/1NO | M20 | SLM21-HPMT2 | ||
| 3NC+2NC | M20 | SLM21-IPMT2 | ||
| 3NC+3NC | M20 | SLM21-JPMT2 | ||
| 3NC+2NC/1NO | M20 | SLM21-KPMT2 | ||
| 2NC/1NO+3NC | M20 | SLM21-LPMT2 | ||
Power to lock | 1NC/1NO+1NC/1NO | M20 | SLM21-APET2 | |
| 1NC/1NO+2NC | M20 | SLM21-BPET2 | ||
| 2NC+1NC/1NO | M20 | SLM21-CPET2 | ||
| 2NC+2NC | M20 | SLM21-DPET2 | ||
| 2NC/1NO+1NC/1NO | M20 | SLM21-EPET2 | ||
| 2NC/1NO+2NC | M20 | SLM21-FPET2 | ||
| 2NC/1NO+2NC/1NO | M20 | SLM21-GPET2 | ||
| 3NC+1NC/1NO | M20 | SLM21-HPET2 | ||
| 3NC+2NC | M20 | SLM21-IPET2 | ||
| 3NC+3NC | M20 | SLM21-JPET2 | ||
| 3NC+2NC/1NO | M20 | SLM21-KPET2 | ||
| 2NC/1NO+3NC | M20 | SLM21-LPET2 |
Top release(Metal)
Magnetic voltage/ indicator | Lock/Release method | Contact type (door monitor + lock monitor) | Connector size | Model |
Electromagnetic DC24V Green LED | Power to release | 1NC/1NO+1NC/1NO | M20 | SLM21-AMMT2 |
| 1NC/1NO+2NC | M20 | SLM21-BMMT2 | ||
| 2NC+1NC/1NO | M20 | SLM21-CMMT2 | ||
| 2NC+2NC | M20 | SLM21-DMMT2 | ||
| 2NC/1NO+1NC/1NO | M20 | SLM21-EMMT2 | ||
| 2NC/1NO+2NC | M20 | SLM21-FMMT2 | ||
| 2NC/1NO+2NC/1NO | M20 | SLM21-GMMT2 | ||
| 3NC+1NC/1NO | M20 | SLM21-HMMT2 | ||
| 3NC+2NC | M20 | SLM21-IMMT2 | ||
| 3NC+3NC | M20 | SLM21-JMMT2 | ||
| 3NC+2NC/1NO | M20 | SLM21-KMMT2 | ||
| 2NC/1NO+3NC | M20 | SLM21-LMMT2 | ||
Power to lock | 1NC/1NO+1NC/1NO | M20 | SLM21-AMET2 | |
| 1NC/1NO+2NC | M20 | SLM21-BMET2 | ||
| 2NC+1NC/1NO | M20 | SLM21-CMET2 | ||
| 2NC+2NC | M20 | SLM21-DMET2 | ||
| 2NC/1NO+1NC/1NO | M20 | SLM21-EMET2 | ||
| 2NC/1NO+2NC | M20 | SLM21-FMET2 | ||
| 2NC/1NO+2NC/1NO | M20 | SLM21-GMET2 | ||
| 3NC+1NC/1NO | M20 | SLM21-HMET2 | ||
| 3NC+2NC | M20 | SLM21-IMET2 | ||
| 3NC+3NC | M20 | SLM21-JMET2 | ||
| 3NC+2NC/1NO | M20 | SLM21-KMET2 | ||
| 2NC/1NO+3NC | M20 | SLM21-LMET2 |
Front release(Plastic)
Magnetic voltage/ indicator | Lock/Release method | Contact type (door monitor + lock monitor) | Connector size | Model |
Electromagnetic DC24V Green LED | Power to release | 1NC/1NO+1NC/1NO | M20 | SLM21-APMF2 |
| 1NC/1NO+2NC | M20 | SLM21-BPMF2 | ||
| 2NC+1NC/1NO | M20 | SLM21-CPMF2 | ||
| 2NC+2NC | M20 | SLM21-DPMF2 | ||
| 2NC/1NO+1NC/1NO | M20 | SLM21-EPMF2 | ||
| 2NC/1NO+2NC | M20 | SLM21-FPMF2 | ||
| 2NC/1NO+2NC/1NO | M20 | SLM21-GPMF2 | ||
| 3NC+1NC/1NO | M20 | SLM21-HPMF2 | ||
| 3NC+2NC | M20 | SLM21-IPMF2 | ||
| 3NC+3NC | M20 | SLM21-JPMF2 | ||
| 3NC+2NC/1NO | M20 | SLM21-KPMF2 | ||
| 2NC/1NO+3NC | M20 | SLM21-LPMF2 | ||
Power to lock | 1NC/1NO+1NC/1NO | M20 | SLM21-APEF2 | |
| 1NC/1NO+2NC | M20 | SLM21-BPEF2 | ||
| 2NC+1NC/1NO | M20 | SLM21-CPEF2 | ||
| 2NC+2NC | M20 | SLM21-DPEF2 | ||
| 2NC/1NO+1NC/1NO | M20 | SLM21-EPEF2 | ||
| 2NC/1NO+2NC | M20 | SLM21-FPEF2 | ||
| 2NC/1NO+2NC/1NO | M20 | SLM21-GPEF2 | ||
| 3NC+1NC/1NO | M20 | SLM21-HPEF2 | ||
| 3NC+2NC | M20 | SLM21-IPEF2 | ||
| 3NC+3NC | M20 | SLM21-JPEF2 | ||
| 3NC+2NC/1NO | M20 | SLM21-KPEF2 | ||
| 2NC/1NO+3NC | M20 | SLM21-LPEF2 |
Front release(Metal)
Magnetic voltage/ indicator | Lock/Release method | Contact type (door monitor + lock monitor) | Connector size | Model |
Electromagnetic DC24V Green LED | Power to release | 1NC/1NO+1NC/1NO | M20 | SLM21-AMMF2 |
| 1NC/1NO+2NC | M20 | SLM21-BMMF2 | ||
| 2NC+1NC/1NO | M20 | SLM21-CMMF2 | ||
| 2NC+2NC | M20 | SLM21-DMMF2 | ||
| 2NC/1NO+1NC/1NO | M20 | SLM21-EMMF2 | ||
| 2NC/1NO+2NC | M20 | SLM21-FMMF2 | ||
| 2NC/1NO+2NC/1NO | M20 | SLM21-GMMF2 | ||
| 3NC+1NC/1NO | M20 | SLM21-HMMF2 | ||
| 3NC+2NC | M20 | SLM21-IMMF2 | ||
| 3NC+3NC | M20 | SLM21-JMMF2 | ||
| 3NC+2NC/1NO | M20 | SLM21-KMMF2 | ||
| 2NC/1NO+3NC | M20 | SLM21-LMMF2 | ||
Power to lock | 1NC/1NO+1NC/1NO | M20 | SLM21-AMEF2 | |
| 1NC/1NO+2NC | M20 | SLM21-BMEF2 | ||
| 2NC+1NC/1NO | M20 | SLM21-CMEF2 | ||
| 2NC+2NC | M20 | SLM21-DMEF2 | ||
| 2NC/1NO+1NC/1NO | M20 | SLM21-EMEF2 | ||
| 2NC/1NO+2NC | M20 | SLM21-FMEF2 | ||
| 2NC/1NO+2NC/1NO | M20 | SLM21-GMEF2 | ||
| 3NC+1NC/1NO | M20 | SLM21-HMEF2 | ||
| 3NC+2NC | M20 | SLM21-IMEF2 | ||
| 3NC+3NC | M20 | SLM21-JMEF2 | ||
| 3NC+2NC/1NO | M20 | SLM21-KMEF2 | ||
| 2NC/1NO+3NC | M20 | SLM21-LMEF2 |
