WV108
DC Input Limit Alarm |
TECHNICAL SPECIFICATION (WV108)
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| Inputs |
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| Voltage Input
Ranges: |
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±20mV,
±200mV, ±2V, ±20V & ±200V |
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Impedance: |
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>100k ohms |
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Overvoltage: |
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200Vrms,
max. |
| Current
Input Range: |
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±10mA
& ±100mA |
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Impedance: |
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20 ohms, typical |
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Overcurrent: |
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170mA rms,
max |
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Overvoltage: |
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60VDC |
| Minimum Deadband |
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| Range |
Deadband |
| ±20mV |
0.2% (80 microvolts) |
| ±200mV |
0.2% (800 microvolts) |
| ±2V |
0.1% (4mV) |
| ±20V |
0.1% (40mV) |
| ±200V |
0.025% (100mV) |
| ±10mA |
0.1% (20 microamps) |
| ±100mA |
0.025% (50
microamps) |
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| Response Time |
Dynamic Deadband: |
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Relay status will change when
proper setpoint/process condition exists for 100mSec or greater |
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Normal Mode: |
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<250mSec
(analog filtering) |
| Setpoint |
Effectivity: |
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Setpoints are adjustable (by
pushbutton) over 100% of the selected input span |
| Repeatability |
>200mV/10mA: |
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0.1% of full
scale (constant temperature) <200mV/10mA: 0.2% of full scale |
| Relay Contacts |
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2 SPDT (2 form C) Relays |
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1 relay per
setpoint |
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Current rating (general
use) |
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120VAC: 5A;
240VAC: 2A; 28VDC: 5A |
| Material |
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Gold flash over silver
alloy |
| Electrical
Life |
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105
operations |
| Reset Switch |
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For unlatching the relay once
the process is no longer in the alarm state (WV108-2001 only). |
| Local
Range Selection |
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By DIP
switch |
| Stability |
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±100ppm of
FS/°C |
| Common Mode Rejection |
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120dB @ DC,
>90dB @ 60Hz, or better |
| Isolation |
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1800VDC or peak AC between
contacts, input & power |
| ESD
Susceptibility |
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Capable of
meeting IEC 801-2 level 3 (8kV) |
| Humidity |
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Operating: |
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15 to 95% RH
non-condensing @45°C |
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Soak: |
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90% RH non-condensing for
24hrs @60°C |
| Temperature |
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Operating: |
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0 to 60°C |
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Storage: |
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-25 to
+85°C |
| Power |
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9 to 30VDC |
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1.2W typ.,
(2.2W max. with both relays energized) |
| Excitation Voltage |
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24VDC @ 20mA |
| Host
Module Interface |
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IR link |
| Size |
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DIN rail case – refer to
Dimensions drawing |
| Environmental |
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Operating
Temperature: |
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0°C to +60°C (32 to
140°F) |
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Storage Temperature: |
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-25°C to
+85°C (-13 to 185°F) |
| Operating Relative Humidity (non-condensing) : |
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15% to 95%RH at 45° |
| Non-operating Relative Humidity (non-condensing): |
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90%RH at
60°C for 24 hours |
| Agency Approvals |
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CE, EN61326, EN61010-1 |
| (EMC &
Safety) |
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UL and CSA
Combined mark |
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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 Setpoint A is tripped.
- 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.
Options
C620 Factory
calibration of input range, setpoints and output relays.
24VDC Transducer
Excitation
The 24VDC source, which is isolated from line power, is
used for transducer excitation. Typical connections for voltage and current are
shown in Figure 5.
Configuring
Modules
Unless otherwise specified, the factory presets the Model
WV108 as follows:
| Input: |
Current |
| Range: |
±100mA |
| Output: |
Dual, SPDT |
| Trip: |
A: HI, B: LO |
| Failsafe: |
No |
| Deadband: |
A, B: minimum |
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- For other ranges, refer to the SWITCH SETTINGS table (see
Figure 6). Reconfigure switches S1 and S2 for the desired input type and
range.
- Set position 1 of S1 to ON if a WVC16 will be utilized
and remote calibration capability is desired.
- Set position 2 and 3 of S1 to ON for a Hi trip setpoint
or to OFF for a Low trip setpoint.
- 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 properlyrated MOV across the
load in parallel with a series RC snubber. Use a 0.01 to 0.1µF pulse film
capacitor (foil polypropylene recommended) of sufficient voltage, and a 47W, 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). |
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WV16 Communications
Interface (Optional)
The WVC16 Communications Interface adds
functionality never before found in a signal conditioning system. The WVC16
interfaces with Ultra SlimPak II devices via an internal infrared
communications link (no programming required) and provides the ability to
connect as many as 32 modules to the intranet, allowing the user to view
process data on a near real time basis, perform data logging functions on
specified modules, calibrate the signal conditioners remotely, and view
diagnostic information.
The WVC16 contains a web page server and an e-mail
server. Browsers supported include Internet Explorer 5 or later and Netscape
Navigator 4.7 or later. The user has the ability to have setpoint trip
conditions generate an e-mail message for up to 10 recipients. The module also
contains a countdown timer that can be used to notify when routine maintenance
is required, such as re-calibration. The internal temperature of the module can
also be monitored. All memory to support the signal conditioner’s
historical data, storage of the web pages and all e-mail messages is contained
in the WVC16.
The WVC16 downloads a JAVA applet to the client’s
computer. The applet provides access to the signal conditioner’s data,
which includes the following:
- Module configuration summary
- Module configuration editing
- Diagnostic/warning status
- Alarm setup & status
- E-mail setup, editing & address book
- Process variable viewing
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Calibration
The
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 (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:
- Input Type (mA, mV, V).
- Setpoint A trip point and reset point.
- Setpoint B trip point and reset point.
- Failsafe (ON/OFF).
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