Example Of Fault Monitoring; Pvg 32 - Mainly Used In System With Fixed Displacement Pumps - Danfoss PVE Series 4 Technical Information

Technical Information
Safety in application
PVE, Series 4 for PVG 32/100/120 and PVHC

Example of fault monitoring

Similar to previous example using fault monitoring for deactivation of the hydraulic system with extra
fault inputs using the PVE's with DI (Direction Indication) function.
Example of fault monitoring for deactivation of the hydraulic system
Emergency Man present
Stop
PVE 1
Neutral detection / Supply control
signal
≠
neutral
Fault detection
2)
DI-B
DI Output
DI-A
Logic
U
S
PVE 2
Neutral detection / Supply control
signal
≠
neutral
Fault detection
2)
DI-B
DI-A DI Output
Logic
U
S
System Control Logic e.g. PLUS+1
hydraulic system.
W
Warning
It is the equipment manufacturers responsibility to ensure that the control system incorporated in the
machine is declared as being in conformity with the relevant machine directives.
Other non-electrical modules which can be used in connection with hydraulic deactivation at different
levels.
PVG 32 – mainly used in system with fixed displacement pumps
•
PVSK, commonly used in crane application - full flow dump
•
PVPE, full flow dump for the PVG 120
520L0553 • Rev GD • Jan 2014
switch
1)
OFF
Delay
3)
4)
Delay Memory
1)
OFF
Delay
3)
4)
Delay Memory
high=on
low=off
Fault detection output
®
for signal monitoring and triggering signal for deactivation of the
PVEH-DI
AMP supply
connector
U
S
U
DC2
Error
PVEH-DI
AMP connector
DI-A
DI-B
Error
PVEH-DI
AMP supply
connector
U
S
U
DC2
Error
PVEH-DI
AMP connector
DI-A
Error
Hydraulic
deactivation
P301 319
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