![background image](http://html1.mh-extra.com/html/danfoss/pve-4-series/pve-4-series_technical-information_4063565016.webp)
W
Warning
Error pins from more PVEs may not be interconnected. Not activated error pins are connected to ground
and will disable any active signal. Error pins are signal pins and can only supply very limited power
consumption.
To avoid the electronics in undefined state a general supervision of power supply (U
DC
) and internal clock
frequency is implemented. This function applies to PVEA, PVEH, PVEP, PVES and PVEU independently of
fault monitoring version and PVEM - and will not activate fault monitoring.
The solenoid valves are disabled when:
•
the supply voltage exceeds 36 V
•
the supply voltage falls below 8.5 V
•
the internal clock frequency fails
PVE fault monitoring overview
PVE type Fault monitoring Delay before error
out
Error mode
Error output
status
Fault output
on PVE
1)
LED light
Memory
(reset
needed)
PVEO
PVEM
PVHC
No fault
monitoring
-
-
-
-
-
-
PVEA
PVEH
PVEP
PVES
PVEU
Active
500 ms
(PVEA: 750 ms)
No fault
Low
< 2 V
Green
-
Input signal faults
High
∼
U
DC
Flashing red
Yes
Transducer (LVDT)
Constant red
Close loop fault
Passive
250 ms
(PVEA: 750 ms)
No fault
Low
< 2 V
Green
-
Input signal faults
High
~U
DC
Flashing red
No
Transducer (LVDT)
Constant red
Close loop fault
PVE
Float
six pin
Active
500 ms
Float not active
High
~U
DC
Constant red
Yes
750 ms
Float still active
1)
Measured between fault output pin and ground.
W
Warning
It’s up to the customer to decide on the required degree of safety for the system.
For PVE with direction indication:
•
both DI pins go low when error is active.
•
when U
DC1
is disabled, U
S
is not monitored and defined as 50%.
Spool position feedback (-SP)
The –SP functionality is a 0,5 V to 4,5 V feedback, inverted in direction relative to U
S
with 2,5 V as neutral
value.
Technical Information
PVE, Series 4 for PVG 32/100/120 and PVHC
Safety and monitoring
16
520L0553 • Rev GD • Jan 2014
Содержание PVE 4 Series
Страница 53: ...Technical Information PVE Series 4 for PVG 32 100 120 and PVHC 520L0553 Rev GD Jan 2014 53...
Страница 54: ...Technical Information PVE Series 4 for PVG 32 100 120 and PVHC 54 520L0553 Rev GD Jan 2014...
Страница 55: ...Technical Information PVE Series 4 for PVG 32 100 120 and PVHC 520L0553 Rev GD Jan 2014 55...