Specifications

ELECTRICAL FEEDBACK VALVE
ELECTRICAL CHARACTERISTICS
Supply Voltage: An electrical feedback always employs an
on-board position transducer and often times has the valve
control electronics on-board.Thus Electrical Feedback Valves
require a supply voltage. Supply voltages for some models are
24 VDC (19 VDC min. and 32 VDC max.), while others require
±15 VDC (±3%).
Input Signals: There are two basic options for command signals
for Electric Feedback Valves – voltage and current. Each valve
series may offer different options, so consult individual data sheets
for choices. For voltage commands, the spool stroke of the valve is
proportional to differential input (V
D
and V
E
).The valve is opened
100% (opening P ➧ A and B ➧ T) by a maximum voltage (V
D
- V
E
)
command.A voltage command that is in the midpoint of the
voltage command range results in the spool being centered. If
only one command signal is available, pin D or E is connected to
signal ground. For current commands, the spool stroke of the
valves is proportional to I
D
or I
E
.The valve is opened 100%
(opening P ➧ A and B ➧ T ) by a maximum current (I
D
- I
E
).
A current command that is in the midpoint of the current
command range results in the spool being centered.
Measuring Spool Position: Electric Feedback Valves permit
the monitoring of actual spool position by measuring the signal
from pin F.The output signal can be either current or voltage.
Check individual valve series data sheets for specific options.The
amplitude of the output signal is proportional to spool position.
6+PE Electrical Configuration: Moog offers up to three
configurations of electrical connections for its Electric Feedback
Valves. See page 14 for details.They are available on:
– Direct Drive Servo-Proportional Valves
– ServoJet
®
Servo-Proportional Valves
– Electrical Feedback Servovalves
11+PE Electrical Configuration: Moog also offers a
11+PE connector for its D660, D680 and D691 Series Valves.
This connector allows additional monitoring of the valve,
including dequate supply voltage and position error logic.
See page 14 for details.
Shielding: All signal lines should be twisted pairs and shielded.
Shielding connected radially to z (0 V), power supply side, and
connecting to the mating connector housing (EMC) should
be used.
EMC: All Electrical Feedback Valves, that employ on-board
or integrated electronics; meet the requirements of
EN 55011/3.91 class B, EN 50081-1/01.92, and EN 50082-
2/03.95 performance criterion class A.
Explosion Proof:Valves are available with explosion proof
protection to EN 50018, class EEx d II C-C
2
H
2
T5.
systems
systems
systems
13