Direction Indication Feedback (-Di) - Danfoss PVE Series 4 Technical Information

Technical Information
Safety and monitoring
PVE, Series 4 for PVG 32/100/120 and PVHC
Spool position feedback (-SP)
U
s
75% U
U
DC
sp
50% U
DC
U
25% U
s
DC
Spool travel
7 mm 0 mm
Neutral
100%
A port

Direction indication feedback (-DI)

PVE with build in indication for spool movement direction are available.
The PVE–DI has dual power supply. U
back. The PVE does not work without U
signal fault monitoring is disabled if U
The DI has two direction feeedback signals with output high (close to U
position. If the spool moves out of neutral position, the direction signal switches to low (< 0.2 V). One of
the signals goes low by spool ~0,8 mm out of neutral and high by spool within 0,4 mm out of neutral.
Both direction indication signals go low when the error indicator goes high.
Direction indication feedback
DI-A low
DI-B high
-0.8 -0.4
A-port
PVBS towards PVE
As shown in the figure, both "DI-A" and "DI-B" signals are "High" when the spool is in neutral position.
When the spool is moving in the A direction, the "DI-A" signal goes "Low" and the "DI-B" signal stays
"High". The reverse is true when the spool is moved in the B direction.
Values for both Direction Indicators, pin A and pin B
Transition to low from high
Transition to high from low
Transition to low both pins
Maximum load of "DI-A" , "DI-B"
Voltage DI high by load 20 mA
Voltage DI high by load 50 mA
Voltage DI low
520L0553 • Rev GD • Jan 2014
U
sp
4.5V
U
s
2.5V
U
sp
0.5V
Spool travel
7 mm
100%
B port
only supplies solenoid valves. U
DC1
. DI-A and DI-B are relative standard mounting. The input
DC2
is disabled. DI-A and DI-B are relative standard mounting.
DC1
DI-A high
DI-B low
0 0.4 0.8
B-port
PVBS away from PVE
0.8 ± 1 mm [0.031 in]
0.4 ± 1 mm [0.015 in]
error pin goes high
50 mA
> U – 1.5 V
DC
> U – 2.0 V
DC
< 0.2 V
supplies electronics and feed
DC2
) when the spool is in neutral
DC
Spool position 'x'
mm [in]
17