Example Of Fault Monitoring - Danfoss PVG 100 Technical Information

Technical Information
PVG 100 Proportional Valve Group
Safety
© Danfoss | May 2018

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
Stop
PVE 1
Neutral detection / Supply control
signal
≠
neutral
2)
DI-B
DI-A DI Output
Logic
U
S
PVE 2
Neutral detection / Supply control
signal
≠
neutral
2)
DI-B
Output
DI-A DI
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.
Man present
switch
1)
OFF
Delay
Fault detection
3)
4)
Delay Memory
1)
OFF
Delay
Fault detection
3)
4)
Delay Memory
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
high=on
low=off
Hydraulic
deactivation
P301 319
520L0720 | BC00000039en-US0502 | 23