NORSTAT Safety Relays - Handbuch (Seite 16)

application guide safety relays from riese electronic page 16
D Important B2-standards
1 E-stop function according to DIN EN 13850
Requirements on the function
ƒ It must always be available (4.1.1)
ƒ It takes priority over all other commands (4.1.1)
ƒ It must not affect the effectiveness of the safety
devices (4.1.2) ( possibly continuing operation of auxiliary
devices, e.g. breaks)
ƒ It must not cause additional hazards (4.1.3)
(e.g. the rescue of persons must be possible)
ƒ After the reset command, no activation
of restart command is allowed (4.1.6)
ƒ It must avert danger in the best possible way.
2 Stop-function according to DIN EN 60204 part 1
There are the categories of stop-functions:
Category 0:
Shutdown by immediate breaking of the power to the machines
– drive sections.
Category 1:
A controlled shutdown whereas the power to the machines
– drive sections is maintained to break. The power will only be
interrupted if idleness has been reached.
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