Duplomatic EPC 10 Series User manual

0,20
DIN 43650
VCC 10 ÷ 30
Ripple included
kg
IP 67
EPC
ELECTRONIC CONTROL UNIT
FOR OPEN LOOP
SINGLE SOLENOID
PROPORTIONAL VALVE
SERIES 10
PLUG VERSION
FUNCTIONAL BLOCK DIAGRAM
SPECIFICATIONS
Power supply
Electrical connection
Protection to atmospheric
agents (according to IEC 144
standard)
Operating temperature range °C -20 ÷ +70
Mass
Reference signal standard
optional V0 ÷+10
0 ÷+5
kΩ100
Input reference signal
impedance
Output current
Required power W
A
see par. 2.1
see par. 1 and 5
P2 - RAMP
Ramp regulation
P4 - SWITCHING
PWM frequency
regulation
P1 - GAIN
Scale factor
regulation P3 - OFFSET
Offset current
regulation
89 110/101 ED 1/4
89 110/101 ED
Electromagnetic compatibility (EMC)
- EMISSIONS EN 50081-1
- IMMUNITY EN 50082-2
(see par. 4 - note 1)
BROWN
WHITE
GREEN
YELLOW
in compliance with
89/336 EEC

1 - IDENTIFICATION CODE
EPC
SERIES 10
3 - ADJUSTMENT
P1 ADJUSTMENT RANGE
3.1 - P1 - GAIN (Scale factor regulation)
Potentiometer “P1” enables regulation of the relation between the
set reference value and the current supplied to the solenoid, and
therefore regulation of the hydraulic parameter controlled by the
valve.
Adjustment range = 0 ÷100 % of maximum current
Single turn potentiometer - Rotate clockwise to increase current.
The EPC unit is a miniaturised electronic control unit for open loop
proportional valves, designed in plug version in compliance with
DIN 43650, for direct mounting on the valve solenoid.
The unit supplies a variable current in proportion to the input
reference signal and independently of temperature variations or
load impedence.
The PWM stage on the solenoid power supply makes it possible to
reduce valve hysteresis thus optimising control precision.
Potentiometers are also fitted for optimal calibration, and can be
accessed by slackening the relative screw and opening the cover
of the connector.
3.2 - P2 - RAMP (Ramp regulation)
Potentiometer “P2” within a range from 0,03 to 1,5 sec. regulates
the time required to reach the current according to a step change of
the reference signal up or down.
This makes it possible to control valve response and adapt it to the
requirements of the hydraulic system and the machine cycles.
Single turn potentiometer - Rotate clockwise to increase ramp time.
89 110/101 ED 2/4
Switching frequency:
0= 200 Hz 1= 100 Hz
4= 400 Hz
Maximum current:
1= 800 mA 2= 1200 mA
3= 1600 mA
Series No. (from 10 to 19 sizes and
mounting dimensions remain unchanged)
Power amplifier
DIN 43650 electrical connection
For single solenoid proportional valves
E P C - 1 / 10
P1 adjustment with
offset (P3) at max
P1 adjustment with
offset (P3) at zero
Reference
2 - FUNCTIONAL SPECIFICATIONS
2.1 - Electric power supply
The card requires a power supply of between 10 and 30 VDC
(ripple included).
NOTE: The value of the power supply voltage on the card must
not be lower than the rated working voltage of the solenoid to
be controlled.
The power supply voltage must be rectified and filtered, with
maximum admissible ripple within the above voltage range.
The power required by the card depends on the power supply
voltage and on the maximum value of the supplied current (it is
determined by the card version). In general a conservative value of
the required power can be considered as the product of V x I.
Example: a card with a maximum current = 800 mA and a power
supply voltage of 24 Vcc requires a power of about 20W. In case of
a card with a maximum current =1200 mA and a power supply
voltage of 24 Vcc the used power is equal to 30 W.
NB. Observe wire polarity and protect the power supply circuit
from overvoltages.
2.2 - Reference signal
The card accepts voltage reference signals of 0 ÷ +10V.
N.B: If the signal is transmitted by potentiometer, please verify
that this has a load of at least 5 KΩΩ(recommended 10 KΩΩ ))..
See par. 7 for electrical connections.
E0 = reference signal 0 ÷+10V (standard)
E2 = reference signal 0 ÷+5V

ADJUSTMENTS
Identification P1 P2 P3 P4
code GAIN RAMP OFFSET SWITCHING
[mA] [mA] [mA] [mA]
EPC - 110 800 200
EPC - 111 800 100
EPC - 114 800 400
EPC - 120 1200 200
EPC - 130 1600 200
6 - START UP AND CONTROL SETTINGS
If required, settings can be modified as follows:
a) OFFSET CURRENT REGULATION
– Set potentiometer “P1” to minimum.
– Enter the maximum reference signal value (+10V).
– Set potentiometer “P3” so that the valve is positioned at the
start of the work zone.
b) SCALE FACTOR REGULATION
– Enter the maximum reference signal value (+10V).
– Set potentiometer “P1” so that the controlled hydraulic
parameter reaches the maximum required value.
NOTE: The maximum current value must be compatible with
the maximum current prescribed by the technical table of
the connected proportional valve.
c) RAMP REGULATION
– Set potentiometer “P2” to smooth valve response according to
reference signal variations.
EPC
SERIES 10
5 - DEFAULT CONDITIONS
The electronic control unit is supplied factory-set.
Standard settings are:
regulation at
minimum
regulation at
minimum
89 110/101 ED 3/4
3.3 - P3 - OFFSET (Offset current regulation)
Potentiometer “P3” enables regulation of the offset current of the
valve.
This is used to eliminate the valve insensivity zone (dead zone).
The offset current is activated when the reference signal exceeds
the threshold of + 150 mV.
The offset is not active and only the polarization current equal to 25
mA is present beneath this threshold.
NOTE: The variation of the set value of the offset current causes a
corresponding variation of the scale factor value setted on P1
potentiometer.
Adjustment range = 0 ÷50 % of maximum current
Single turn potentiometer - Rotate clockwise to increase current.
3.4 - P4 - SWITCHING
(PWM frequency regulation)
It is possible to change the switching frequency (PWM) by acting on
the trimmer P4.
The setting range is from 140 to 400 Hz.
An appropriate switching frequency adjustment allows reduction of
the valve hysterisis value.
Single turn potentiometer - Clockwise rotation to increase the
frequency.
NOTE: The potentiometer setting is sealed with a red coating
and it must never be adjusted by the user.
4 - INSTALLATION
The connector type electronic unit is suitable for direct assembly on
the solenoid of the relative proportional valve.
The 4-core connection cable (0,5 mm2individual wire section) is
supplied pre-wired and in a standard length of 2,5 m (DIN 47100
standard).
NOTE 1
To observe EMC requirements it is important that the control unit
electrical connection is in compliance with the wiring diagram of par. 7.
As a general rule, the valve and the electronic unit connection wires
must be kept as far as possible from interference sources (e.g.
power wires, electrical motors, inverters and electrical switches).
In environments that are critical from the electromagnetic interference
point of view, a complete protection of the connection wires can be
requested.

7 - CARD CIRCUIT AND WIRING DIAGRAM
8 - OVERALL AND MOUNTING DIMENSIONS
EPC
SERIES 10
89 110/101 ED 4/4
REPRODUCTION IS FORBIDDEN. THE COMPANY RESERVES THE RIGHT TO APPLY ANY MODIFICATIONS.
DUPLOMATIC OLEODINAMICA SpA
20025 LEGNANO (MI) - P.le Bozzi, 1 / Via Edison
Tel. [phone]-472236 - Fax [phone]
dimensions in mm
YELLOW
YELLOW
YELLOW
WHITE
WHITE
WHITE
DO NOT
CONNECT
GREEN
power
GREEN
GREEN
power
power
BROWN
POTENTIOMETER EXTERNAL VOLTAGE GENERATOR
POTENTIOMETER ASSEMBLY
BROWN
BROWN
CABLE