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Venting
With pressure command set and lowered supply pressure,
carefully open the venting screw by turning it approxima-
tely one turn. The entrapped air should escape now to-
gether with hydraulic fluid. Wait until no more air bubbles
can be seen in the oil. Then close the venting screw and
torque it to 10 Nm.
Venting should be repeated 2 to 3 times at intervals of 2 to
3 hours.
Increase the supply pressure to the rated value and check
valve and hydraulic system for external leakage, correct
fluid level indication and temperature.
3.3
Electronics information
3.3.1
Characteristic data
Please note information about input signals on the name-
plate!
It must be ensured through correct assembly that a equi-
potential bonding is possible.
3.3.1.1 Supply voltage U
= 24 VDC (19 to 32 VDC).
A
Current consumption I
(Current consumption measured at an ambient tempera-
ture of 25 °C (77 °F) and a supply voltage of 24 VDC.)
External fuse per valve
3.3.1.2 Input command signals at D633K and D634K
Command signal 0 to ±10 mA, floating, signal code X
The spool stroke of the valve is proportional I
100 % valve opening P A and B T is achieved at I
0 mA command the spool is in centred position.
The input pins D and E are floating and inverting. Either
pin D or E is connected to command signal according to
the required operating direction. The other pin is connected
to signal ground at cabinet side.
6
Operating Instructions D633K, D634K and D635K (CA49304-001; Version 6.0, 12/09)
Venting screw
(SW 5)
1.2 A at D633K,
Amax
2.2 A at D634K and
1.0 A at D635K.
D633K/ D635K1.6 A (slow)
D634K 2.5 A (slow)
= –I
D
= 10 mA. At
D
D633K, D634K and D635K Series
Command signal 0 to ±10 V, signal code M
The spool stroke of the valve is proportional (U
100 % valve opening P A and B T is achieved at (U
At 0 V command the spool is in centred position.
The input stage is a differential amplifier. If only one com-
mand signal is available, pin D or E is connected to signal
ground at cabinet side, according to the required operat-
ing direction.
Command signal 4 to 20 mA, signal code S
The spool stroke of the valve is proportional (I
100 % valve opening P A and B T is achieved at I
100 % valve opening P B and A T at I
Use pin D as signal input. Pin E is left open.
Measuring output (actual spool position)
For actual spool position signal I
100 % valve opening P A and B T at 20 mA. 100 % valve
opening P B and A T at 4 mA.
3.3.1.3 Input command signals at D635K
Command signal 0 to 10 mA floating, signal code X
The controlled load pressure of the valve is proportional
I
= –I
. 100 % pressure is achieved at I
D
E
connected to signal ground ⊥.
Command signal 0 to 10 V, signal code M
The controlled load pressure of the valve is proportional
(U
- U
). 100 % pressure is achieved at (U
D
E
E is connected to signal ground ⊥.
Command signal 4 to 20 mA, signal code S
The controlled load pressure of the valve is proportional
(I
- 4 mA). 100 % pressure is achieved at I
D
pin D as signal input. Pin E is left open.
Measuring output (actual pressure)
Signal level for actual pressure output I
also 3.4 „Connector wiring" at page 8.
3.3.1.4 All signal lines, also those of external transducers, shielded.
Shielding connected radially to ⊥ (0 V), power supply side,
and connected to the mating connector housing (EMC).
3.3.1.5 EMC: Meets the requirements of EN 61000-6-4:2007 and
EN 61000-6-2:2005.
3.3.1.6 Minimum cross-section of all leads ≥ 0.75 mm
Consider voltage losses between cabinet and valve.
3.3.1.7 Note: When making electric connections to the valve (shield,
protective earth) appropriate measures must be taken to
ensure that locally different earth potentials do not result
in excessive ground currents.
See also Technical Note TN 353.
3.3.1.8 The protective earth connection is connected to the elec-
tronics housing or valve body. The insulation materials
employed are designed for use in the safety extra-low-volt-
age range.
To comply with safety regulations requires isolation from
the mains as per EN 61558-1 and EN 61558-2-6 and limit-
ing all voltages as per EN 60204-1.
.
We recommend using SELV/PELV power supplies.
E
3.3.2
Connector wiring
See information tag on the valve and 3.4 „Connector wir-
ing" on page 8.
– U
).
D
E
– U
) = 10 V.
D
E
- 12 mA).
D
= 20 mA.
D
= 4 mA.
D
is available (4 to 20 mA).
F
= 0 mA. Pin E is
D
- U
) = 10 V. Pin
D
E
= 20 mA. Use
D
= 4 bis 20 mA. See
F
2
.
© 2003, 2007, 2009 Moog GmbH
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