Schmersal BNS 250-12ZG Coded Magnetic Safety Switch

Description:

The Schmersal BNS 250-12ZG safety sensor is used in industrial machine guarding systems to monitor the position of safety doors, guards, and access panels without mechanical contact. It operates as a coded magnetic safety switch designed for use in safety-rated control circuits where reliable detection of guard position is required. Commonly installed on automated machinery, production lines, and industrial equipment where compliance with machine safety standards and prevention of unauthorized access is required. Maintenance teams and system integrators use this sensor for safety system replacement, machine refurbishment, and OEM safety circuit integration.

Applications:

The Schmersal BNS 250-12ZG safety sensor is commonly used in machine safety systems, automated production equipment, packaging machinery, robotic cells, and industrial guard monitoring applications. It is typically installed on sliding or hinged safety doors to ensure machinery cannot operate when protective barriers are open, supporting personnel safety and regulatory compliance in manufacturing environments.

Technical Specifications:

• Brand: Schmersal
• Manufacturer Part Number (MPN): BNS 250-12ZG
• Product Type: Magnetic Safety Sensor / Safety Interlock Switch
• Sensing Type: Coded magnetic field detection
• Actuator Type: External coded magnet (BPS series compatible)
• Contact Configuration: 1 NO / 2 NC safety contacts
• Operating Voltage: up to 24 V DC (safety circuit dependent)
• Switching Principle: Reed / safety-rated magnetic switching system
• Housing Material: Reinforced thermoplastic
• Protection Rating: IP67
• Mounting Type: Concealed or surface mount
• Connection Type: 4-wire cable (approx. 1 m standard variant)
• Operating Temperature: -25°C to +70°C
• Function: Monitors guard/door position for safety interlock control
• Application: Machine guarding, safety circuits, access control
• Operating Environment: Industrial automation and safety systems

Common Replacements:

• Pilz  safety magnetic switches
• Siemens 3SE5 series safety interlock switches
• Allen-Bradley Guard-master safety door switches (440G series)