D 7831/1 page 7
5.2 Controlling hydraulic valves using one twin or two individual proportional solenoids for
alternating operation
This mode of operation requires a remote-control potentiometer for central
alignment and side recognition of two positively connected direct. switches
SB 1 and SB 2 for solenoid coils 1 and 2
Example f:
Controlling a proportional directional valve type PSL .. or PSV ..
as specified in D 7700-..
F1 = see example a above
P1 = Potentiometer with fixed central alignment, 2x5 k
Ω
R = 31V varistor, such as a Siemens SIOV-S05K25 or SIOV-S10K25
(against radio interference or excess voltage)
Jumpers B1 and B2 (ref. voltage 5V DC) are placed, B3 open
S1B and S2B = directional switches are included in the control gear for
one axle
6. Appendix
6.1
Installation of printed circuit module on card holder
;
Fit together centrepiece of card holder and one of the two side pieces
<
Insert support bar clamp into trapezoid groove at the back
=
insert conductor plate into end of all-round holding grove
>
insert remaining card holder side piece
Enable
disable
Jumper
B1 + B2
closed
Power
supply
Proportional twin
solenoid
or
pair of individual
proportional
solenoids
Module
(printed circuit)
Card holder,
left side
Support bar
clamp
Centrepiece
right
side
All-round
holding groove
for module
(printed circuit)
Rear trapezoid
guide groove for
support bar clamp
