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WV438-2000
ULTRA SLIMPAK® II
WV438
DC Powered Potentiometer Input
Isolating Signal Conditioner
High Accuracy Signal Conditioner with an
Isolated DC Voltage or Current Output
Lower Power Requirements with SmartPower
Improved Accuracy
Bussed Power with Plug-in Power Clips
Removable Terminals for Easy Service
Description
The Ultra SlimPak II is an exciting new line of isolating signal
conditioners from Action Instruments with greater accuracy and
better stability than virtually any other signal conditioners on the
market today. The Ultra SlimPak II features Smart Power, which
eliminates wasted power for low loop resistance loads in the
current output mode.
The WV438 is a potentiometer input signal conditioner supporting
3-wire potentiometers and slidewire devices from 100 ohms to
100k ohms. The switch selectable output ranges are 0-10VDC,020mA and 4-20mA. All of the output ranges are fully adjustable
via pushbutton calibration. The input default range is 0 to 100%
of the potentiometer range, but can be adjusted via pushbutton
calibration to any 20% portion of the potentiometer. The default
output range is 4-20mA.
Smart Power
The Ultra SlimPak II uses Smart Power to control its output supply.
Smart Power automatically adjusts the the voltage to drive the
output loop to the required current. A low impedance current
loop will subsequently require less voltage than a loop with higher
impedance. Previous designs provided only a single supply at the
highest voltage required to drive the highest impedance load.
Using Smart Power results in power savings and reduces the
operating temperature of the signal conditioner.
RoHS Compliant
Touch Cal for Best Stability and Accuracy
DIP Switch Configuration
Optional E-mail Notification of Alarms
Enhanced LED Diagnostics
Other than when executing the pushbutton calibration routine,
the LEDs blink under the following conditions:
GREEN:
Flashes at 2Hz when the input is under range.
Flashes at 8Hz when the input is over range.
RED:
Flashes at 2Hz when the output is under range.
Flashes at 8Hz when the output is over range.
An Under Range condition exists when the signal is lower than the
operational low value minus 6.25% of the operational span. An
Over Range condition exists when the signal is higher than the
operational high value plus 6.25% of the operational span.
A voltage output short circuit may cause an under range condition
(RED blinking at 2Hz rate). A current output open circuit may cause
an over range condition (RED blinking at an 8Hz rate).
There could be two or more LEDs blinking at the same time, which
means the module has more than one error condition. Only when
all error conditions have been removed, will the LEDs be back to
normal (Green ON, Red and Yellow Off).
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Configuring Modules
Unless otherwise specified, the factory presets the Model WV438
as follows:
Input: Potentiometer
Range: 100 ohms to 100k ohms
Output: Current
Range: 4-20mA
Reverse Out: Off
Remote Cal: Off
Calibration
See the calibration flowchart in Figure 3. The complete calibration
procedure is contained in the Installation & Calibration Instructions document, which is available on our website
(www.actionio.com). You can also obtain it by telephoning Action
technical support (
Note that Custom Calibration (option C620) is available from the
factory (settings MUST be within the units specifications). For a
C620, specify the following:
1. Set position 1 of S1 to ON if a WVC16 will be utilized and remote
calibration capability is desired.
2. Set position 2 and 3 of S1 for the desired output type.
3. Set position 4 of S1 to ON for reverse output operation.
It is also possible to remotely select the setpoints using an Ethernet
connection and the optional WVC16 Communications Interface
module.
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a) Potentiometer Input Range, in percent
(for example: Input = 25 to 75% of pot rotation).
b) Output Type & Range
(for example: 4-20mA).
c) Reverse Output Function (ON/OFF).
ON = Closed
1
Remote Cal On
Remote Cal Off
4
3
2
Reverse Output
Direct OutputOnOff
Output Range: 4 to 20 mA
(see Table)
On
Off
Default Switch Settings
Figure 1: Switch Settings
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Figure 2: Wiring Connections
Figure 3: Calibration Flowchart
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Specifications
r
Potentiometer Resistance (end to end):
100 ohms (min.) to 100k ohms (max.)
Input Ranges: Pushbutton adjustable
Linearity: ±0.1% of span, typical
Excitation: 300mV, nominal
Turn-Up/Turn-Down: 80% (90% to ±0.2% linearity)
Common Mode Rejection:
60Hz: >100dB
DC: >120dB
Output Ranges:
0 to 10VDC
0 to 20mA
4 to 20 mA
Response Time: 100mSec typical
Stability: ±100ppm of full scale/°C
Output Ripple: 0.2% of span, or 5mVrms, whichever is greater
Output Impedance:
Voltage Output: <10 ohms
Currnet Output: >100k ohms
Output Drive:
Voltage Output: 10 mA, max
Current Output: 20V compliance @ 20mA
Power: 9-30VDC; 1.0W typ., 2.0W max.
Isolation: 1800VDC input to output to power
Host Module Interface: IR Link
Size: DIN rail case – refer to Dimensions drawing
Operating Temperature: 0 to +60°C (32 to 140°F)
Storage Temperature: -25 to +85°C (-13 to 185°F)
Operating Humidity: 15% to 95% RH,non-condensing @ 45°C
Storage Humidity: 90% RH, non-condensing @ 60°C for 24 hours
Agency Approvals (EMC & Safety):
UL recognized per standard UL508
(File No.E99775)
CE Conformance per EMC directive 2004/108/EC and Low Voltage
directive 2006/95/EC (Input < 75VDC, only).
RoHS Compliant
Ordering Information
Specify:
1. Model:
WV438-2000
2. Optional Custom Factory Calibration (specify C620, see required
settings under "Calibration, page 2).
3. Accessories.
Accessories
All WV Series modules will mount on standard TS35 (model MD03)
DIN rail. In addition, the following accessories are available:
WVC16 Communications Interface
MD03 TS35 x 7.5 DIN Rail (2 meters)
WV905 24VDC Power Supply (0.5 Amp)
H910 24VDC Power Supply (1 Amp)
H915 24VDC Power Supply (2.3 Amp)
MB03 End Bracket for MD03
C650 Utility software for WVC16
Printed on recycled pape
Note that detailed installation instructions are available on our website.
Dimensions
Dimensions are in millimeters (inches)
Action Instruments
Chessell
721-0852-00-E 02/09 Copyright© Eurotherm, Inc 2009
Eurotherm
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