Danfoss PVG 120 Technical Information page 14

Technical Information
Safety in Application
14
PVG 120 Proportional Valve Group
System Control Logic, e.g. PLUS+1
hydraulic system.
W
Warning
It is the responsibility of the equipment manufacturer that the control system incorporated in the
machine is declared as being in confirmity with the relevant machine directives.
Example of fault monitoring for deactivation of the hydraulic system with extra fault inputs using the PVE's
with DI (Direction Indication) function.
Emergency
Stop
PVE 1
Neutral detection / Supply control
signal
≠
neutral
2)
DI-B
DI Output
DI-A
Logic
U
S
PVE 2
Neutral detection / Supply control
signal
≠
neutral
2)
DI-B
DI Output
DI-A
Logic
U
S
System Control Logic e.g. PLUS+1
hydraulic system. Other non-electrical modules which can be used in connection with hydraulic
deactivation at different levels.
W
Warning
It is the responsibility of the equipment manufacturer that the control system incorporated in the
machine is declared as being in confirmity with the relevant machine directives.
520L0356 • Rev JA • Mar 2014
®
for signal monitoring and triggering signal for deactivation of the
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
1(U )
S
2(U
DC2
3( )
4(Error)
PVEH-DI
AMP connector
1(DI-A)
2(DI-B)
3( )
4(U )
DC
PVEH-DI
AMP supply
connector
1(U )
S
2(U
DC2
3( )
4(Error)
PVEH-DI
AMP connector
1(DI-A)
2(DI-B)
3( )
4(U )
DC
high=on
low=off
Hydraulic
deactivation
P301 319
)
)