KJT intrinsically safe NAMUR proximity switches are mainly used in equipment and environments that require explosion protection, such as coal mines, petrochemicals, etc. The NAMUR signal is the most widely used intrinsically safe digital input and frequency input standard signal in the world. The earliest is the German standard (DIN19234). Later it became a European standard (EN 50227, DIN EN 60947-5-6). The NAMUR signal is a passive 2-wire system, nominal 8VDC power supply, 1mA and 3mA switching signals. NAMUR type sensors are intrinsically safe explosion-proof instruments and are usually used in conjunction with isolated safety barriers.
Technical parameter | |
Size | M12*25mm |
Mounting | Flush |
Sensing Distance SN [mm] | 2mm |
Housing material | Brass nickel plated |
| Operating voltage | 6-12VDC |
Output | NO/NC |
Ripple | - |
No Load Current | >2.2mA(OFF) <1.1mA(ON) |
| Voltage Drop | <1.5V |
Switching Frequency | 150 Hz |
Response Time | 0.05ms |
Switching Hysteresis | <15%(Sr) |
Repeat Accuracy | <1%(Sr) |
Protection Degree | IP67 |
Operating Temperature | -25℃-+70℃ |
Temperature Drift | <1%(Sr) |
| Short Circuit Protection | - |
Overload Trip Point | 180mA |
| EMC | RFI>3V/m / EFT>1KV / ESD>4KV (contact) |
| Shock/vibration | IEC 60947-5-2,Part 7.4.1 / IEC 60947-5-2,Part 7.4.2 |
Connection | PVC Cable 2M |