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1.4
Standards
•
Draft: Fundamentals for the testing and certification of "Bus systems for the
transmission of safety-relevant messages"
•
DIN V VDE 801 – Fundamentals for computers in systems with safety tasks
•
EN 954-1 – Safety of machines – safety-related elements of control systems
•
EN 50295 – Low-voltage switching devices; control-system and device interfaces;
actuator sensor interface (AS-i)
•
EN 60204-1 – Safety of machines – electrical equipment for machines – Part 1:
general requirements
•
EN 60947-5-1 – Low-voltage switchgear and controlgear – Part 5-1: control
devices and switching elements; electromechanical control devices
•
EN 61496-1 – Non-contact safety guards
1.5
Definition of terms
Output switching element (safety output) of the AS-i safety monitor
Element activated by the logic of the monitor which is able to safely switch off the
downstream control elements. The output switching element may switch to or remain in
the ON state only when all components are functioning as intended.
Output circuit
Consists of the two logically connected output switching elements.
OSSD
The safe AS-i components and functional components assigned to an output circuit.
They are responsible for releasing the machine element which generates the hazar-
dous movement.
Integrated slave
Component in which sensor and/or actuator functions are grouped together with the
slave to form a unit.
Configuration operation
Operating state of the safety monitor in which the configuration is loaded and checked.
Master
Component for data transmission which controls the logical and temporal behaviour on
the AS-i line.
External device monitoring circuit (contactor monitoring)
The external device monitoring circuit allows the switching function of the contactors
connected to the AS-i safety monitor to be monitored.
Safety output
See output switching element.
Safe input slave
Slave which reads in the safe ON or OFF state of the connected sensor or command
device and transmits it to the master or safety monitor.
ASM1, ASM1E
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