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Part No.:
Connector Amplifier
CAPV-H-4-20MA-x
Where: x=current output (options are 2A, 1.2A, 600MA or 300MA)
complete with cable
CAPV-4C-yM
y=cable length (m) 2 meters is the standard length.
Function:
The Connector Amplifier - coil mount supplies a solenoid valve with current proportional to an input control (4-20 mA).
Application:
Accurate control of hydraulic and pneumatic proportional solenoid valves used in mobile construction equipment and industrial processes.
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Description:
The 4-20 mA Connector Amplifier simplifies control of proportional solenoids by supplying a current proportional to an input control (4-20 mA). This linear solenoid controller utilizes high frequency switching output (PWM) to provide a DC current output. Maximum current output options are 2 Amps, 1.2 Amps, 600 mA or 300 mA. A current sensing circuit maintains current output regardless of changes in input voltage or coil resistance. The user can adjust maximum and minimum current. Ramp time, dither frequency and amplitude can also be adjusted to match the application. It is CE certified for the EMC Directive. The unit is available with a DIN 43650 connection to mount directly on the coil. Other versions are available with 0-5 VDC/0-20 mA/10K potentiometer or 0-10 VDC inputs. A remote mount version is housed in a rugged metal box.
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Features:
- Maximum current adjustment does not affect minimum current setting
- Adjustments accessible with a removable cover
- IP65 weather resistance rating
- Broad range of supply voltages (9 to 32 VDC) with no degradation in performance
- Current sensing circuit maintains output regardless of changes in input voltage or coil resistance
- Modern technology utilizing high frequency switching output (PWM)
- Energy efficient design (no heat sink is required)
- Accepts 4-20 mA signal input
- Maximum current output options include 2 A, 1.2 A, 600 mA or 300 mA
- Ramp settings are independent
- Simple implementation of "soft shift" control with minimal external components
- Mates to a DIN 43650 plug on a cartridge or block style solenoid valve
- Electronic limiting circuit means no internal fuses
- Short circuit proof (in case of solenoid failure or miswiring)
- Reverse polarity protection
- CE certified to the EMC Directive
- Can disconnect load while connector amplifier is powered ("Hot Swap")
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Technical Specifications: All specifications typical at nominal input voltage and 25 degrees C unless otherwise specified.
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General Specifications:
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| Operating
conditions |
-40 to + 85°C (-40 to 185°F)
0 to 85% relative humidity |
| Storage
temperature |
-50 to 125°C (-58 to 257°F)
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| Electromagnetic
compatibility (EMC) |
Emission EN 50081-2
Immunity EN 50082-2 |
| Approvals |
CE |
| Electrical
connection |
DIN 43650 plug
2 metres jacketed cable, 4 conductor (18AWG)
(A version for remote mounting is also available.) |
| Protection
class |
IP65 when correctly installed with lid,
compression washer, o-ring, and base gasket |
| Dimensions
in mm/inches |
Length L1
L2
L3
Width=L3
Height H1 |
85.35 mm
61.75 mm
34.00 mm
34.00 mm
38.00 mm |
3.36"
2.43"
1.34"
1.34"
1.49" |
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Electrical Specifications:
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Operating
voltage
(power supply requirement) |
9 to 32 VDC
power supply range * |
| Control input
signal options |
4-20 mA
current signal
(0-5 VDC/0-20 mA/10K potentiometer and 0-10 VDC control input versions are
also available.) |
| Range of
maximum output current |
2 A, 1.2 A,
600 mA or 300 mA |
| Input
resistance |
50
Ohms |
| Solenoid
resistance (nominal) |
Nominal
resistance of solenoid coil should comply with:
Rcoil<(Vpower supply - 1.5V)/Imax
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* Note:
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Match power supply voltage with rating of solenoid coil.
Operating the amplifier with a supply voltage lower than the solenoid rated
voltage may result in reduced maximum current output.
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The coil should have no polarity or protection diodes
for proper operation of the device.
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The maximum current output of the amplifier should not
exceed the current rating of the solenoid coil.
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Adjustments:
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| Minimum current setting |
0 to 0.5 A (for 2 A output version)
0 to 0.3 A (for 1.2 A output model)
0 to 150 mA (for 600 mA output model)
0 to 75 mA (for 300 mA output version) |
| Maximum current setting |
0.6 to 2.0 A (for 2 A output version)
0.36 to 1.2 A (for 1.2 A output model)
180 to 600 mA (for 600 mA output model)
90 to 300 mA (for 300 mA output version) |
| Current ramp time |
0.01 to 5.0 seconds independent |
| Dither amplitude |
0 to 10% of rated maximum
current |
| Current dither frequency |
70 to 350 Hz (+/- 10% of full
scale) |
Mounting Instructions:
- Supply voltage should be between 9 and 32 VDC. Excess voltage will damage the unit. Match the power supply voltage with the voltage rating of the solenoid coil. Operating the amplifier with a supply voltage lower than the solenoid rated voltage may result in reduced maximum current output.
- The maximum current output of the amplifier should not exceed the current rating of the solenoid coil.
- The coil should have no polarity or protection diodes for proper operation of the device.
- Do not install the amplifier near high voltage relays or other sources of electrical interference.
- Connect the power supply, signal input and valve solenoid.
- Set the input signal to the maximum level and confirm it is operating properly.
- Ensure the transparent lid is firmly in place. Ensure the brown rubber base gasket is in place, providing a seal between the amplifier and the plug on the valve. The mounting screw, compression washer and o-ring should be flush with the top of the lid and fastened in place.
- Tighten the screw to make a firm connection to the valve with a Phillips #2 screwdriver.
Connections:
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Connect the cable conductors to the
power supply and input signal as follows.
For 4-20 mA Control:
Turn ramp screws fully counterclockwise to eliminate ramping.
Use I-Min. screw to set up minimum speed with minimum control input.
Use I-Max. screw to set maximum speed with 100% of control input.
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Adjustments:
The following settings represent a typical set up for a current signal input operating scenario. Conditions will vary for other set up scenarios. Use a small screwdriver to loosen the mounting screw and remove the transparent lid. The trim pots are adjusted with a jeweler's sized screwdriver (slotted 1.5). I min and I max are multi-turn trimpots with a range of 10 turns.
| Trim Pot Adjustments |
Range of Adjustment |
Factory Setting |
| Zero=Minimum Current Setting (Imin) |
0 to 0.5 A (for 2 A output version)
0 to 0.3 A (for 1.2 A output model)
0 to 150 mA (for 600 mA output model)
0 to 75 mA (for 300 mA output version) |
0% (CCW) |
| Span=Maximum Current Setting (Imax) |
0.6 to 2.0A* (for 2 A output version)
0.36 to 1.2 A (for 1.2 A output model)
180 to 600 mA (for 600 mA output model)
90 to 300 mA (for 300 mA output version) |
100% (CW) |
| Ramp Time (Rising and Falling Edge) |
0.01 to 5 seconds independent |
minimum (0.01 seconds) (CCW)** |
| Dither Level (Amplitude) |
0 to 10% of rated maximum current |
0% (CCW) |
| Dither Frequency |
70 to 350 Hz (±10%) |
minimum (CCW) |
CW=clockwise, CCW=counterclockwise
*NOTE: Range of maximum output current is 2A (maximum output current=minimum current setting + maximum current setting).
**NOTE 2: To eliminate ramping, turn the trim pots fully counterclockwise.
Adjusting the minimum current will shift the maximum
current as shown.
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Adjusting the maximum current does not affect the
minimum current setting.
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Setting the Minimum Current (Imin):
The minimum current setting can be used to take into account the mechanical valve deadband and provide desired offsets from zero to allow full control within the functional range of the specific valve.
Setting the Maximum Current (Imax):
The maximum current setting is adjusted to meet the customer's working pressure or flow range to the full scale signal input range. This provides maximum control for a specific application.
Setting the Ramp Times:
Ramp times are application dependent. They limit the rate of change or how fast the operation happens. Note that if the input signal is not applied long enough for the ramp time set, the desired solenoid current will not be reached.
Setting the Dither Amplitude:
Dither amplitude is adjustable from 0 to 10% of the rated maximum current. Dither amplitude and frequency are dependent on the specific valve. The effects of static friction on the operation of the solenoid are reduced by the application of a small AC current. The hysteresis and repeatability of the valve are improved by this practice. The optimum dither amplitude is attained when small input signal changes register similar changes in current output (pressure or flow through the valve).
Setting the Dither Frequency:
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Ordering Part Number:
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(4-20 mA Input Version)
DIN 43650 coil mount version - 2 Amp max. output - 2 m cable - P/N: CAPV-H-4-20MA-2A
DIN 43650 coil mount version - 1.2 A max. output - 2 m cable - P/N: CAPV-H-4-20MA-1.2A
DIN 43650 coil mount version - 600 mA max. output - 2 m cable - P/N: CAPV-H-4-20MA-600MA
DIN 43650 coil mount version - 300 mA max. output - 2 m cable - P/N: CAPV-H-4-20MA-300MA
Custom cable lengths are available. |
OEM and distributor pricing is available upon request.
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DATASHEET
Download the datasheet provided in Adobe PDF format.
If you do not have Adobe Acrobat Reader installed, go to www.adobe.com and download Adobe Acrobat Reader. |
Request a fax or email copy of the datasheet.
Please email sales@axiomatic.com and provide the product name, part number, your contact information, telephone and fax number.
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Specifications are subject to update without notice.
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