Purchase now: Schmersal 103045528 EX-BNS 250 ATEX Sensor
Purchase now: Atlantech Drives provides you the Schmersal 103045528 (Model: EX-BNS 250-12Z-2187-3GD), a specialized Explosion-Proof Magnetic Safety Sensor. This device is certified for use in potentially explosive atmospheres, specifically **Zone 2 (Gas)** and **Zone 22 (Dust)**. It allows for non-contact monitoring of safety guards in hazardous environments such as flour mills, paint shops, or chemical processing plants, where standard switches could generate a dangerous spark.
Technical Specifications for Hazardous Areas
The EX-BNS 250 is fully encapsulated in a rectangular thermoplastic housing (**IP 67**), ensuring no internal sparking can reach the atmosphere. The «3GD» suffix confirms its compliance with ATEX categories 3G and 3D. It operates with a coded magnet principle (Actuator EX-BPS 250) and provides **1 NO / 2 NC** contacts. The «2187» variation typically includes a specific pre-wired cable configuration (usually 1 meter) suitable for Ex-zones.
- Part Number: 103045528.
- Model: EX-BNS 250-12Z-2187-3GD.
- ATEX Classification: Ex II 3G Ex nC IIC T6 Gc / Ex II 3D Ex tc IIIC T80°C Dc.
- Zones: Zone 2 (Gas) & Zone 22 (Dust).
- Contacts: 1 NO / 2 NC.
- Connection: Pre-wired Cable.
- Switching Capacity: Max 24 VDC / 100 mA.
- Housing: Rectangular, impact resistant.
Expert Installation Advice: Intrinsic Safety Wiring
Even though the sensor is ATEX rated, the circuit it connects to matters. Expert Tip: The EX-BNS 250 is designed to limit energy, but you must ensure the monitoring relay or PLC input card limits the current to **100 mA** or less. Exceeding this current can fuse the internal reed contacts, creating a potential ignition source or a safety failure. Always verify the maximum switching capacity on the datasheet before powering up in a hazardous zone.
Frequently Asked Questions (FAQs)
Q: Does it come with the actuator?
A: No, the matching ATEX actuator **EX-BPS 250** must be ordered separately. Standard BPS 250 actuators lack the ATEX markings and certification documentation required for inspections.
Q: Can I shorten the cable?
A: In ATEX installations, cable joints are potential weak points. Ideally, route the cable directly to an Ex-e junction box outside the hazardous zone without splicing.
Do you need more references from this brand? Explore our full catalog of Schmersal here.
