Products Machine Safety Surface mount models for E-stops


pushed button. Its visual indication method reduces down-time due to stop conditions. The lockable style actuator can provide supervisory or personal control. It is intended to prevent unauthorised or acci- dental resetting by accommodating a pad- lock to secure the actuated button in place. To enhance safety across the factory


A Surface Flush Mount E-Stop has recent- ly been added to Banner Engineering’s range of emergency stop buttons. Designed to mount to a wall or other flat surface without disassembling or individ- ual wiring, the 40mm buttons are available with a non-illuminated base with four actu- ator styles - standard, illuminated actuator, lockable actuator and an illuminated lock- able actuator or an illuminated base with a standard or a lockable actuator. The e-stops feature Banner’s EZ-LIGHT logic and are available with two colours (yellow or green and red lighting) or one colour (red lighting).


Depending on the model, the LED illu- minated base changes from yellow to flashing red when actuated, immediately alerting operators to an emergency stop condition. The illumination helps operators quickly identify the actuated button(s) and resets them with a pull or twist of the


floor, multiple E-stops can be connected via the CSS Series Hookup cordsets for system wide control. By applying an exter- nal signal via the M12 QD connector, the illuminated base models can change from a steady yellow light to a steady red indi- cator light when a stop condition exists. Models that interface with Safety BUS nodes/gateways are also available. The Surface Flush Mount E-Stop buttons have ‘Safe Break Action’ to ensure the safe- ty contacts will open if the contact block is separated from the actuator. The push-to- stop, twist-to-release or pull-to-release actuator and direct (positive) opening operation is compliant with ANSI B11.19, ANSI NFPA79, ISO 13850 and IEC/EN 60204-1 Emergency Stop requirements and meets worldwide safety standards with a red button and yellow background. Banner Engineering www.turckbanner.co.uk T: 01268 578 888


Simplifying series connection


Offering series connection of up to 30 switches, achieving PLe, Cat 4 integrity and full diagnostic cover- age of an installation, SICK has introduced its new TR4 Direct safety sensors for doors and gates. The sensors overcome the limita- tions on series connection imposed by BS EN 13849-1 and ISO/DIS14119, as SICK’s Seb Strutt explained, “The series connection of traditional mechanical and mag- netic switches has been restricted by the requirements of existing and imminent safety standards because of the need to avoid undetected faults when electro-mechanical switches are connected in series and are not individually monitored. “In high risk applications where PLe or even PLd interlocking is required, fault exclusions are not advised in relation to mechanical actuators. Series connection of switches must consider the poten- tial for faults to remain undetected and should reflect this fact in the


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declared diagnostic coverage of the functional safety system. These restrictions have led to con- siderable complexity and expense in providing effective safety integrity with many traditional sensor configurations.” With the new SICK TR4 Direct series, fault finding and trouble shooting is simplified. Each sensor in a chain can indicate a fault, open or closed status and the cur- rent sensing range of the device. Each sensor can also indicate the status of the preceding sensor in the chain which allows quicker identification of an open switch or fault in the system.


They are installed using standard M12 connection cables and M12 T connectors, and the use of 24V DC dual channel outputs ensures the sensors have compatibility with many safety relays and PLCs. TR4 Direct has a sensing range of 25mm and IP69K environmental protection and comes in either multicode or in a unique code format where each sensor is paired with a unique actuator which is ‘taught-in’ during commissioning. SICK www.sick.co.uk T: 01727 831 121


RMQ-Titan range expanded


Eaton has expanded its RMQ- Titan range of control circuit devices with the addition of new emergency stop palm buttons, pushbutton actuators and M22 emergency stop/off buttons. The new emergency stop palm buttons are available in widths of 45 and 60mm and with a number of options such as with or with- out key, turn to reset, non-illumi- nated or illuminated and standard LEDs or mechanical switch position indication (green/red) in the middle of the actuating element. This last fea- ture enables unambiguous switch position indication when mount- ing the emergency stop button in a guard ring.


Features of the new emergency stop pushbutton actuators include the option of an illumi- nated ring which can be used to ensure their position is indicated as clearly as possible on a machine or plant, even in dark environments. The illuminated ring also indicates the machine’s operating state reliably, even from a long distance. For exam- ple, when tripped, three sepa-


rately controllable LED rows can be activated as a running light. The possibility of individually labelling the illuminated ring using the Labeleditor software will also soon be available. The new M22 emergency stop/off buttons offer IP67 and IP69K protection and are tamper- proof in compliance with EN ISO 13850. They also meet European and international safety stan- dards in accordance with EN 60204 and IEC 60204. Approval to UL/CSA and approvals for shipboard use from Germanische Lloyd and Lloyd’s Register of Shipping are in preparation. Eaton www.eaton.com T: 0161 655 8900


Certified safety technology


Operator safety is essential on the shop floor at all times. When a safety circuit is activated because a safety cover or door has been opened, any danger of accidents through rotating machine parts must be ruled out. However, at the same time, high availability of machines is vital. Economic efficiency requires quick restarts after safety relat- ed shutdowns.


SK 200E distributed frequency


inverters from NORD DRIVESYSTEMS are optimised for cost efficient drive solutions, but also feature several safe-


ty functions which, depending on the switching device, enable safe shutdown proce- dures in high risk applications that comply with Category 4 or Performance Level e according to EN 13849-1. Conventional frequency inverters in this performance class prevent motors from


restarting by disconnecting the voltage supply or the 24V control supply. By contrast, SK 21xE and SK 23xE models feature a certified safe pulse blocking device as well as digital inputs for the ‘Disable Voltage’ and ‘Quick Stop’ functions. These enable Stop Category 1 (controlled motor braking in line with SIL 1), followed by Safe Torque Off (SIL 3 compliant) or Stop Category 0 (SIL 3 compliant) according to EN 60204-1.


Since the voltage supply is blocked without switching off the control or power elec-


tronics, the units remain on standby and are ready to be switched on without re-initiali- sation after the safety circuit is closed. In addition to high availability, the inverters’ safe- ty technology provides more economic benefits - contactor components are not required, and since the safety functions are activated electronically, there is no need for regular maintenance or exchange of electromechanical contacts. NORD GEAR www.nord.com T: 01235 534 404


SPRING 2013 Industrial Compliance


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