Features & Benefits
• Compact size … ideal for limited space applications.
• Sealed for submersibility … assures long-term reliability
in the most hostile environments.
• Tamper-resistant … cannot be bypassed with simple
magnets.
• Rugged, corrosion-resistant housing … tolerates most
industrial environments.
• Integral LED status indicators … facilitate easy
installation and provide visual indication of switch status.
• Shock and vibration tolerant … designed to withstand
mechanical abuse.
• Satisfy CE & fail-to-safe requirements … when used with
Series AES safety controllers.

Description
The Series BNS250 coded-magnet sensors are designed for
use as a safety interlock switch on movable machine
guards/articulating robot arms. Each sensor set consists of a
multiple reed switch unit and a coded-magnet actuator. The
reed switches, wired in series, will only close in the presence
of their matched magnetic field array.
Both switch and magnet assemblies are sealed to IP67
(submersible) standards. Their tamper-resistant design
prevents bypassing with a simple magnet or improperly coded
magnetic field. In addition, the BNS module features a 1-
meter long prewired pigtail.

Typical Applications
The sealed, compact BNS250 is ideal for use on movable
machine guards in hostile environments. Typical applications
include food processing equipment, chemical processing
equipment, woodworking machinery, packaging machinery,
and articulating robot arm rest position sensing.