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50
Safety function for servopneumatics
Pneumatic stopping
Notes
• This set-up can be used for
horizontal and vertical axes.
• When the emergency stop is
activated, the compressed air
remains trapped in the drive;
the drive is not free of
compressed air.
• It is characteristic of
pneumatic systems that the
trapped compressed air in the
cylinder does not lead directly
to a standstill of the axis. The
overtravel depends on the
current speed and the moving
mass.
• On restart, the drive can move,
depending on the start
conditions. If the valves VSVA
are switched on with a delay
depending on SDE5, this
movement can be minimised.
• Use of a braking/clamping
unit, together with the
servopneumatic controller,
can prevent a movement
on restart.
Features
• Protection against unexpected
start-up (2-channel)
• Safety measure: stopping
a movement (2-channel)
• Stop category: “1”
• The compressed air supply is
switched off (2-channel)
Element
V1
V2, V3
V5
A3
S1
Part no.
550 171
534 546
161 109
548 713
544 428
542 897
11 689
Designation
VPWP-6-L-5-…
VSVA-B-M52-MZH-A1-1R5L
NAS-1/4-01-VDMA
MS6-SV-1/2-E-10V24-SO
DGCI-40-750-P-A
SDE5-D10-FP-Q6E-P-M8
H-QS-8
Description
Proportional valve, component of the
servopneumatic system as a first channel
5/2 single solenoid switching valve with spring
return and auxiliary pilot air and switching
position sensing as a second channel.
The size (flow rate) is based on the
proportional valve.
Soft-start/quick exhaust valve with 2-channel
self monitoring and performance level e.
Rodless linear drive with displacement
encoder
Pressure switch for monitoring the restarting
pressure
Non-return valves
Safety function
Stopping a movement
Input
Logic
Output
Pneumatic
Electrical
See the technical data of the individual products for detailed information.
Please observe the legal information on page 73.
Cat.
3
PL
d
DC
High
CCF
>65%
Channels
2
Safety component
No
to MD 2006/42/EC
All specified values are
maximum values, which
can be achieved via
correct operation
of the component.