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 WV128 is a Thermocouple Input Limit Alarm with dual
setpoints and two contact closure outputs. The input type and
alarm functions are field configurable, offering maximum flexibil-
ity. There are seven thermocouple types (B, E, J, K, R, S and T) from
which to choose. Alarm setpoints are fully adjustable throughout
the entire range.
The WV128-2000 contains two standard non-latching SPDT relays.
When power is removed, the relays revert to their non-powered
state. The WV128-2001 contains two latching relays. Whatever
position the relays are in when power is removed is where they will
remain when power is re-applied (a reset switch is provided to
reset the relays after the alarm is no longer true). Both models are
configurable as a single or dual setpoint alarm, with HI or LO trips.
The WV128-2000 supports failsafe or non-failsafe operation. In
failsafe operation the relay coil is energized when the process is
below the HI setpoint or above the LO setpoint (opposite for non-
failsafe). In the failsafe mode, a power failure results in an alarm
state output.
Operation
Each of the alarm setpoints has a respective HI or LO deadband.
Red LEDs will illuminate indicating an alarm condition. The trip will
reset only when the process falls below the HI deadband or rises
above the LO deadband. (The WV128-2001 requires pressing the
reset switch in order to reset the relays after being tripped.) The
deadband can be left at the minimum level (the factory default)
or can be set to whatever level is desired.
Options
C620 Factory cal of input range, setpoints and output relays.
ULTRA SLIMPAK® II
WV128
DC Powered T/C Input Limit Alarm
Provides Relay Contact Closures at a
Preset Temperature Input Level
Programmable HI or LO, Failsafe or Non-failsafe
Improved Accuracy
Adjustable Deadband
Bussed Power with Plug-in Power Clips
Removable Terminals for Easy Service
WV128-2000 (non-latching)
WV128-2001 (latching)
Touch Cal for Best Stability and Accuracy
RoHS Compliant
LED Trip and Input Indicators
Optional E-mail Notification of Alarms
Enhanced LED Diagnostics
Other than when executing the pushbutton calibration routine,
the LEDs blink under the following conditions:
RUN (Green):
On when unit is powered.
Flashes at 2Hz when input is under range.
Flashes at 8Hz when input is over range.
SETPOINT A (Red):
On when Setpoint A is tripped.
On when setting Setpoint A.
Flashes while calibrating the input level.
SETPOINT B (Red):
On when Setpoint B is tripped.
On when setting Setpoint B.
On while calibrating the input level.
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.
Figure 1: Limit alarm operation and effect of deadband.
Configuring Modules
Unless otherwise specified, the factory presets the Model WV128
as follows:
Input: Type J
Output: Dual, SPDT
Trip: A: HI, B: LO
Failsafe: No
Deadband: A, B: minimum
Remote Cal: No
1. For other ranges, refer to the SWITCH SETTINGS table (see
Figure 4). Reconfigure switches S1 and S2 for the desired input
type and range.
2. Set position 1 of S1 to ON if a WVC16 will be utilized and remote
calibration capability is desired.
3. Set position 2 and 3 of S1 to ON for a Hi trip setpoint or to OFF
for a Low trip setpoint.
4. Set position 4 of S1 to ON for failsafe operation (e.g. alarm trips
upon power failure) or OFF for non-failsafe operation (-2000 only).
It is also possible to remotely select the setpoints using an Ethernet
connection and the optional WVC16 WebView Communications
Interface module.
Relay Protection and EMI Suppression
When switching inductive loads, maximum relay life and transient
EMI suppression is achieved using external protection (see Figures
2 & 3). Place all protection devices directly across the load and
minimize all lead lengths. For AC inductive loads, place a properly-
rated MOV across the load in parallel with a series RC snubber. Use
a 0.01 to 0.1mF pulse film capacitor (foil polypropylene recom-
mended) of sufficient voltage, and a 47ohm, 1/2W carbon resistor.
For DC inductive loads, place a diode across the load (PRV > DC
supply, 1N4006 recommended) with (+) to cathode and (-) to
anode (the RC snubber is an optional enhancement).
Calibration
See calibration flwchart in Figure 6. The complete calibration
procedure is contained in the Installation & Calibration Instruc-
tions document, which is available on our website
(www.actionio.com). You can also obtain it by telephoning Action
technical support (703-669-1318).
Note that Custom Calibration (option C620) is available from the
factory (settings MUST be within the units specifications). For a
C620, specify the following:
a) Input type.
b) Setpoint A trip point and reset point.
c) Setpoint B trip point and reset point.
d) Failsafe (ON/OFF).
Note that if a deadband entry is not specified, the default setting
of 0.25% will be used.
Figure 4: Switch Settings
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12 34 5 6 7 8
tupnI
Vm02-/Vm08+----
c/tB----
c/tE----
c/tJ----
c/tK----
c/tR----
c/tS----
c/tT----
elbanElaCetomeR ------
)iH(woL/iHA-
----
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----
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---
:yeK a/n=-;desolCroNO=1=
Figure 2: DC Inductive Loads Figure 3: AC Inductive Loads
ON = Closed
1234567
Remote Cal Enable
Remote Cal Disable
On
Off
"A" Hi Trip
"A" Low Trip
On
Off
"B" Hi Trip
"B" Low Trip
On
Off
Failsafe
Non-Failsafe
On
Off
Input: Type J T/C
(see Table)
Default Switch Settings
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11 ByaleR.O.N
21 ByaleR.moC
31 ByaleR.C.N
12 )+(rewoPCD
22 )-(rewoPCD
32 noitcennoCoN
14 )+(tupnIC/T
24 )-(tupnIC/T
34 noitcennoCoN
15 AyaleR.O.N
25 AyaleR.moC
35 AyaleR.C.N
Figure 5: Wiring Connections
Figure 6: Calibration Flowchart
Specifications
Inputs:
Thermocouples Supported: B, E, J, K, R, S, T
Ranges:
T/C °C°F
B +75 to 1820 +167 to 3308
E -265 to 1000 -445 to 1832
J -210 to 760 -346 to 1400
K -265 to 1372 -445 to 2502
R -25 to 1760 -13 to 3200
S -25 to 1760 -13 to 3200
T -265 to 390 -445 to 734
Overvoltage: ±10V differential
Common Mode: 1800VDC (Input to Ground)
Limit Differential (deadband): 0.2% to 100% of span. Set by
Pushbutton Adjustment.
Response Time:
Dynamic Deadband: Relay status will change when proper setpoint/
process condition exists for 100mSec.
Normal Mode: <250mSec (analog filtering)
Setpoint:
Effectivity: Setpoints are adjustable (by pushbutton) over 100% of
the selected input span.
Repeatability: ±0.05% of FS, ±1°C (constant temp)
Relay Contacts:
2 SPDT (2 form C) Relays
1 relay per setpoint
Current rating (general use):
120VAC: 5A; 240VAC: 2A; 28VDC: 5A
Material: Gold flash over silver alloy
Electrical Life: 105 operations
Reset Switch:
For unlatching the relay once the process is no longer in the alarm
state. (WV128-2001 only)
Local Range Selection: By DIP switch
Stability: ±100ppm of FS/°C
Common Mode Rejection: 120dB @ DC, >90dB @ 60Hz, or better
Isolation: 1800VDC or peak AC between contacts, input & power.
ESD Susceptibility: Capable of meeting IEC 801-2 level 3 (8kV)
Power: 9 to 30VDC; 1.2W typ., (3.25W max both relays energized)
Host Module Interface: IR link
Wire Terminations: Screw terminations for 12-22 AWG
Size: DIN rail case – refer to Dimensions drawing
Environmental:
Operating Temperature: 0°C to +60°C (32 to 140°F)
Storage Temperature: -25°C to +85°C (-13 to 185°F)
Operating Humidity (non-condensing): 15% to 95% at 45°C
Storge Humidity (non-condensing): 90% at 60°C for 24 hours
Agency Approvals (EMC & Safety):
UL recognized per standard UL508
(File No.E99775)
CE Conformance per EMC directive 89/336/EEC and Low Voltage
73/23/EEC (Input < 75VDC, only).
RoHS Compliant
Note that detailed installation instructions are available on our website.
Ordering Information
Specify:
1. Model:
WV128-2000 (non-latching) or
WV128-2001 (latching)
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
Dimensions
Dimensions are in millimeters (inches)
Eurotherm, Inc
741-F Miller Drive
Leesburg, VA 20175-8993
703-443-0000
info@eurotherm.com or www.eurotherm.com/actionio
Factory Assistance
For additional information on calibration, operation and installation
contact our Technical Services Group:
703-669-1318
721-0859-00-D 02/09 Copyright© Eurotherm, Inc 2009
Action Instruments Barber-Colman Chessell Continental Eurotherm
actionsupport@eurotherm.com
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