Page 33 - Clippard - Electronic Valves

EVPD PROPORTIONAL VALVE DRIVER

Features
• Plug-and-play interface between Clippard’s EVP
series valves and PLCs or other controls
• Linearized valve response right “out of the box”
• Three selectable valve output ranges
• Five signal inputs to choose from
• Easy integration with existing machine controls
• User-adjustable parameters
• Automatic Temperature Compensation to maintain
constant current
• Two configuration options: stand-alone PCB or
enclosed in housing
• Compact size.
Plug-and-Play Control for Proportional Valves
The EVPD Proportional Valve Driver fast-tracks valve-control Power Requirements
applications. This product is ideal for laboratories and OEM Power input requirements are specified as supply volt-
product development, and can be customized to fit OEM age ranges for each EVP valve. Supplying voltages out-
applications including control parameters. The EVPD pro- side of these ranges may result in valve
duces driver current for Clippard’s EVP series valves propor- malfunctioning. Power requirements are determined
tional to input control signals. by the valve voltage specification.

Power Requirement: 7 to 28 VDC @ 5 Watt (see chart) EVP Input EVPD Max
Input Impedance: 200 kΩ RoHS Valve Type Voltage Range Output*
0 to 5 VDC 7 to 12 VDC 400 mA
Command Set-Point Signal Type: Selectable: 0 to 5 VDC, 0 to 10 VDC,
0 to 20 mA, 4 to 20 mA, PWM @ ≥2 kHz duty cycle 0 to 10 VDC 12 to 28 VDC 200 mA
0 to 20 VDC 14 to 28 VDC 100 mA
Adjustments: Minimum Drive Current, Maximum Drive Current,
Command Deadband * See EVP Valve Current Requirements
LED Indicators: Power; Activity Status & Faults
Part No. Description
Output: 0 to 0.4 A (selectable range) EVPD-2 EVPD Driver Assembly in Enclosure
EVPD-1 EVPD Driver Board
Temperature Range: 0° to 155°F
EVPD-2DIN DIN Rail Mounting Clip
Size: Open card: 1.5” x 1.3” x 0.4” unmounted; Enclosed: 2.2” x 1.8”
x 0.7” excluding DIN clip (shown at right) with Screws
For further information, visit www.clippard.com/evpd Effect on Valve Flow
100
90
1.8
80
% of Full Scale Flow 60 Using Driver
Power Status Indicator
LED LED 70
Direct DC Current
50
Direct DC
EPVD Driver
Command 40 Current only
2.2 Threshold
Current Min 30
Current Max
20
10
0
0 10 20 30 40 50 60 70 80 90 100
Power (7 - 28 VDC) Current Command % of Full Scale Input Signal
Common (GND) Voltage Command
Valve + Valve -
Figure 1: Effect of Driver Output on EVP Flow
207 Clippard Instrument Laboratory, Inc. 877-245-6247 www.clippard.com