Page 44 - Safety engineering guidelines. Pneumatic and electric solutions

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44
Features
• Protection against unexpected
start-up (2-channel)
• Safety measure: reversing
(1-channel)
• Safety measure: travel at
reduced speed (1-channel)
• Pressure supply not
deactivated
Notes
• Can also be used for vertical
axes
• If an emergency stop is
activated, the drive is
pressurised.
• On reactivation, the drive
can move, depending on the
activation conditions.
• Use of a braking/clamping
unit, together with the
servopneumatic controller,
can prevent a movement on
restart.
Safety function for servopneumatics
Pneumatic reversing
Part no.
550 171
534 546
161 109
535 413
542 897
193 973
11 689
Designation
VPWP-6-L-5-…
VSVA-B-M52-MZH-A1-1R5L
NAS-1/4-01-VDMA
DNCI-50-500-P-A
SDE5-D10-FP-Q6E-P-M8
GR0-QS-6
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 as a 2nd channel. The size (flow rate) is
based on the proportional valve.
Standard cylinder
Pressure switch for diagnostics of the emergency stop
valves (VSVA)
Flow control valve for regulating the repositioner speed
Non-return valve
Safety function
Reversing at reduced speed
Input
Logic
Output
Pneumatic
Electrical
Cat.
3
PL
d
DC
Medium
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.
See the technical data of the individual products for detailed information.
Please observe the legal information on page 73.