Coded system guards up to 20 doors
A
Schmersal UK product story
Edited by the Engineeringtalk editorial team
Sep 27, 2004
Compatibility problems are claimed to be a thing of the past with the latest BNS-AES coded door guarding system from Schmersal.
Compatibility problems are claimed to be a thing of the past with the latest BNS-AES coded door guarding system from Schmersal.
As Schmersal's Steven Hill explains: "Matching safety sensors to relay modules can lead to problems if the units selected don't have the correct current and voltage input restrictions on the safety relay".
"Problems are caused by high input currents being switched through the reed contacts when the safety guard is closed".
"The excessive current, which may be caused by a high input capacitance on the connected control module, can lead to the NC contact of the safety sensor welding closed".
The Schmersal system, which can be used to guard a single door to Control Category 4 or up to 20 doors to Control Category 3, consists of matched BNS safety sensors and AES modules - and every system selected is approved by the German notified body BG to ensure that components are compatible with, and suitable for, the relevant safety function.
The noncontact BNS coded sensors, which are completely encapsulated and have an ingress protection rating of IP67, are designed to meet the increasing demands for safety sensors to withstand harsh environments and conditions.
The high degree of sealing is ideal for applications where machine wash down or the prevention of dust or powder ingress is an important requirement, and the smooth wipe clean surfaces also make BNS sensors ideal for the food and beverage industries.
The system's coding is operated by a special magnetic field with a specific polarisation and field strength that is applied to switch the reed contacts.
The precise arrangement of the reed contacts within the safety switch has been selected so that the contacts only change state when a unique magnetic field is present.
The BNS coding system prevents manipulation by standard magnets and the versatility of the sensor itself means it can be mounted behind stainless steel panels to prevent tampering by machine operators.
The noncontact BNS design, which can be fitted to virtually any profile and surface, also provides greater tolerance for actuator and sensor alignment than fixed mechanical switches with separate actuators, which can in time suffer from misalignment problems.
The system's small physical size is particularly suited to monitoring small guard doors and entry flaps requiring small actuating radii that can be hard to achieve with larger mechanical switches and actuators.
The BNS-AES system consists of a magnetic safety switch, actuator and safety module.
The range is capable of monitoring a single guard door to EN954-1 Control Category 4 or up to 20 doors to EN954-1 Control Category 3.
Not what you're looking for? Search the site.
Google Ads
Contact Schmersal UK
Related Stories
- Warning device outputs up to 131dB
- GSF to distribute Interfron hydraulic power units
- IDEC safety controller is easily configured
- Aerotech adds vertical translation stage to ANT
- Positioning stages with sub-nanometre resolution
Articles by product category
- Consultancy and Services (903)
- Machine Building (4,517)
-
Engineering Design Software (6,179)
- Engineering Design Software (12)
- 2D CAD software (200)
- 3D CAD software (1,157)
- FEA and structural analysis software (369)
- Fluid, thermal, noise, vibration software (334)
- Simulation, modelling, validation software (914)
- Rendering, visualisation, styling software (196)
- Materials design and moulding design software (151)
- Process, instrumentation, automation software (258)
- Electrical design software (164)
- Publishing and documentation software (229)
- Maths, charting, statistics, QA software (317)
- Data, document management software (310)
- CAM, CNC, production management software (568)
- File conversion software, data capture (351)
- PLM and collaboration software (649)
-
Drives, Motors and Controls (3,361)
- Drives, Motors and Controls (1)
- Precision Motors and Gears (411)
- Industrial Drives/Controls (1,276)
- Linear Drives and Motors (114)
- Industrial Motors (497)
- Stepper and Servo Drives, Motors, Controls (1,060)
- Small Mechanical Components, Joining, Tools (1,975)
-
Control and Instrumentation (5,028)
- Plantwide control (1,324)
- Plant- and Machine-Wide Communications (1,174)
- Smaller-Sized PLCs (387)
- CNC and Motion Controllers (184)
- Mid-range and Large PLCs (201)
- Power Supplies, Uninterruptible Power (562)
- HMIs/Operator Interfaces (294)
- Logic Controllers, Timers and Relays (96)
- Cabling, Conduit, Signal Conditioning (806)
-
Monitoring, Measurement and Quality (5,459)
- Monitoring, Measurement and Quality (1)
- Data acquisition Software and Communications (494)
- Data Acquisition Hardware and PC I/O Boards (472)
- Electrical and Electronic Testing, PAT Equipment (630)
- Form/co-ordinate, optical, vision instruments (703)
- Gauges, Indicators and Instruments (440)
- Data loggers (422)
- Materials testing equipment (421)
- Telecomms/network test equipment, software etc (154)
- Testing and Calibration Services and Information (500)
- Testing, analysing and monitoring equipment (1,222)
-
Electrical and Electronic Equipment Design (4,160)
- Batteries, chargers and circuit protection (555)
- Connectors, Terminals, Busbars, Slip Rings (679)
- Enclosures and Equipment Cooling Fans (709)
- Knobs, Handles and Enclosure Hardware (420)
- PCs and Embedded Systems (798)
- Electrical and Electronic Subassemblies (369)
- Electrical and Electronic Components (630)
-
Materials and Processing (2,963)
- Materials and Processing (5)
- Materials and components (2,215)
- Rapid Prototyping (458)
- Materials processing and testing (285)
-
Engineering Industry News, Resources (6,093)
- Engineering Industry News, Resources (4)
- Engineering Business News, Views (388)
- Engineering Exhibitions, Events (562)
- Engineering Conferences (425)
- Engineering Seminars (400)
- Engineering Industry Developments, Awards (633)
- Engineering Guides, Newsletters (349)
- Engineering Recruitment, Employment (219)
- Engineering Training Courses (433)
- Engineering Education, Resources, Standards (838)
- Engineering Industry Reports, Surveys (597)
- Electronic Resources for Engineers (278)
- Health and Safety Legislation (402)
- Health and Safety Strategy, Risk Assessment (113)
- Health and Safety Consultancy, Software (175)
- Health and Safety Events, Training, News (277)
-
Powertrain Design (3,598)
- Powertrain Design (2)
- Bearings (939)
- Chains and belts (326)
- Gears, brakes, couplings and engines (1,441)
- Hydraulic Components (471)
- Lubricants (418)
-
Capital Equipment (3,387)
- Capital Equipment (1)
- Manufacturing Machinery and Plant Equipment (468)
- Production line blowers and fans (62)
- Compressors and Air Treatment (510)
- Electronics Manufacturing, Tools, Instruments (192)
- Electrical hardware (131)
- Machinery and Production Equipment (1,093)
- Robotics, Handling and Storage (930)
-
Sensors (7,080)
- Sensors (8)
- Accelerometers and Vibration Sensors (427)
- Loadcells, Force Sensors, Torque Sensors (699)
- Pressure sensors (621)
- Flowmeters and Flow Sensors (618)
- Level Sensors and Leak Detectors (527)
- Linear Position Sensors (399)
- Rotary Position, Tilt and Angular Sensors (546)
- Proximity Sensors (700)
- Gas, Chemical, Radiation, Magnetic Sensors (284)
- Humidity and Environmental Sensors (152)
- Temperature sensors (612)
- Vision and Colour Sensors (1,384)
- Barcode Sensors (103)
- Valves, Pumps, Process Hardware (3,623)
