Festo Рабочие компоненты для VTIA, ISO 15407-2 - Handbuch (Seite 43)

VABF-S4-1-V2B1…
Festo – VABF-S4-1-V2B1…-D2 – 1212a English 43
1.4 Electrical and pneumatic status changes
Status change Operating status
before status change
Operating status
after status change
Failure/switch-off of the
electrical supply of the
vacuum module (M12
connection)
“Generate vacuum” “Generate vacuum”
(The valve slide remains in
“Generate vacuum” position)
“Air saving” “Generate vacuum”
(Through the mechanical spring,
the valve slide goes into the
“Generate vacuum” position)
“Ejection” “Normal position”
1)
“Normal position”
1)
“Normal position”
1)
Failure/switch off of the
pilot air supply
“Generate vacuum” “Generate vacuum”
“Air saving” “Generate vacuum”
“Ejection” “Normal position”
1)
“Normal position”
1)
“Normal position”
1)
1) Normal position means the vacuum module is not in the “Generate vacuum”, “Air saving” or “Ejection” operating status.
Tab. 2 Pneumatic and electrical status changes
Note
If there is a failure of the air or electrical supply of the valve terminal, the following
statuses result.
• Air failure:
– No vacuum can be generated, even if the valve is in the “Generate vacuum”
position.
– No ejection impulse can be generated, even if the valve is in the “Ejection”
position.
• Failure of the valve terminal electrical supply:
– The switching position of the valve can only be changed through the electronics
of the vacuum module (change between “Generate vacuum” and “Air saving”).