114
AVAILABLE STANDARD MODELS
(Please order BPS250 magnet separately)
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.
Operation
The reed switch assembly is typically mounted to a stationary
portion of a guard structure, with the coded-magnet assembly
mounted to the movable element of the machine guard. When
the guard is closed, and the matched magnetic field aligns
with the reed switch unit, the switches will close. When the
guard is open, or the required magnetic-field array is not
properly aligned with the reed switch assembly, the sensor
output will remain “off.”
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.
Coded-Magnet Sensors
BNS250-11z
1 NO & 1 NC
BNS250-12z
1 NO & 2 NC
BNS250-11zG
1 NO & 1 NC
BNS250-12zG
1 NO & 2 NC
Multiple reed switch
(24VDC/100mA) assembly
with 1-meter prewired
pigtail
Multiple reed switch
(24VDC/10mA) assembly
with 1 meter prewired pigtail
and built-in LED display
Multiple reed switch
(24VDC/10mA) assembly with
1 meter pigtail (side entry) and
built-in LED display
Part Number
Contact
Configuration*
Description
BNS250-11zG-2205
1 NO & 1 NC
BPS250
N/A
Coded-magnet actuator
SERIES BNS250
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.
*Contact configuration in presence of BPS250 coded-magnet
actuator.
*Important Note: Series BNS Coded-magnet sensors are for use
in safety applications only when used with a
SCHMERSAL Series AES safety controller.
(Please see selection chart on Page 130.)
USE WITH ANY OTHER SAFETY CONTROLLER MAY
DAMAGE SENSOR AND/OR VOID WARRANTY.
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