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SAFE SWITCHING AND MONITORING
Safety switches with separate actuators are suitable for sliding, hinged and particularly removable safety guards, which need to be closed to ensure the necessary operational security. They are also suitable for fitting on profile sections and existing equipment.
AZM range solenoid interlocks, operating in combination with control elements of a machine, e.g. fail-safe standstill monitors or fail-safe delay timers, ensure that sliding, hinged and removable guarding devices, such as grids, hoods or doors, cannot be opened until hazardous conditions (e.g. running-down movements) have come to an end.
The door handle actuator offers more than a “normal” door handle: The advantage of this combination of safety switch and door handle is that the operating and safety functions are comprised in one assembly. The range of products includes versions made of metal or plastic as well as versions with or without solenoid interlock. There are also versions that feature a sensor for automatic door detection (door closed yes/no). All versions are health and safety approved and certified.
Position switches with safety function are suitable for sliding and hinged safety guards which need to be closed to ensure the necessary operational security. In combination with safety monitoring modules all position switches class 1 shown in this chapter achieve Control Category 3 or 4 to EN ISO 13849-1.
These safety switches are suitable for hinged safety guards, which need to be closed to ensure the necessary operational security. The variety of requirements to be found in practice can be met by means of the wide range of safety switches for hinged guards.
The magnetic safety sensors serve to monitor the position of sliding, hinged and removable safety guards. Sensors without integral evaluation can only be used for safety duties to DIN VDE 0660-209 in combination with a safety guard monitor for protection up to Control Category 4 to EN ISO 13849-1.
Pull-wire Emergency Stop switches are mounted on machines and sections of plants which cannot be protected by guards. In contrast to mushroom head Emergency Stop push buttons, on pull-wire switches the Emergency Stop command can be initiated from any point on the wire.
Command devices are of great importance for the man-machine interface in the area of industrial applications. For example, they are mounted in switch-boards, control panels, two-hand control panels, in lift manufacture and on materials-handling plants, including conveyors. Manual actuation of the devices starts operating sequences and functional processes or serves to bring these to an end.
Standard in higher – quality instead of “do-it-yourself”.
The basis of the BDF series is a slim enclosure in shock-resistant plastic, which can be quickly and smoothly fitted on the customary aluminium profile systems used in mechanical engineering and which can accommodate four control elements. As the control elements are regarded, the user can choose from a comprehensive range of illuminated pushbuttons, selector switches, signalling devices with LED, key-operated switches and standard-compliant emergency stop command devices.
Optoelectronic safety device are used as entry, danger point or danger zone guards.
SLG/SLC range safety light grids and light curtains can be integrated into the safety concept of the machine or plant even under tight space conditions by virtue of their very compact design.
Two-hand control panels are non-separating protection devices. In general, they serve to ensure the location of both hands of a machine operator who gives a control signal for a movement which can be dangerous. Two-hand control panels thus ascertain that intervention by the operator in dangerous moving processes is avoided when a machine or plant has been started.
Together with other safety measures, consent switches are used to protect persons from potentially hazardous situations where machine guards need to be inactivated completely or in part in special operating modes. These special situations will typically include setting up a machine, service work or ob-serving processes. If the operator releases the button or - in the case of the 3-stage version - presses the button down completely through the middle setting, the control command is safely interrupted.
Actuated by physical contact, tactile safety monitoring devices stop the hazardous movement. The diversity of applications requires constructively different devices.
Safety foot switches are mounted on machines and plants as permissive switches in cases where manual operation is not possible.
Easy, safe and reliable. AS-Interface Safety at Work (SaW) is the first safety bus system based upon the open standard of AS-International. Safety components such as Emergency Stop command devices, safety switches, solenoid interlocks or safety light curtains are simply connected to the yellow AS-Interface cable. For the evaluation of the safety signals a “Safety Monitor” is merely added to the AS-Interface system.
The SHGV range is particularly suitable in mor complex production systems and plants to protect divided maintenance and service doors which are used only rarely. Other applications include situations in which an electrical schock is possible, applications with higher ambient temperatures, specific uses in extreme ambient conditions and in chemical and process engineering in view of the explosion protection feature (see also Explosion-protected switchgear).