Watanabe WSPF Series Plug-In Signal Converters
The Watanabe WSPF Series provides signal isolation and conversion for measurement and control applications. Select a model for DC signals, transmitter loops, thermocouples, RTDs or potentiometers, with one or two outputs according to the application.
The plug-in construction allows the converter to be removed from its socket for maintenance. Before selection, match the complete input, output and power specification to the connected equipment.
Key Features
- Compact plug-in design with a separate socket.
- Single-output and two-output models.
- Front zero/span adjustment with a ±10% range.
- 15-turn trimmers for fine adjustment.
- Dedicated high-speed isolator options.
Compare All 13 WSPF Models
| Model | Function | Outputs |
|---|
| WSPF-IS |
Isolator |
1 |
| WSPF-DS |
Isolator |
1 |
| WSPF-DSW |
Isolator |
2 |
| WSPF-DE |
High-speed isolator |
1 |
| WSPF-DEW |
High-speed isolator |
2 |
| WSPF-DBZ |
Distributor / transmitter loop supply |
1 |
| WSPF-DBZW |
Distributor / transmitter loop supply |
2 |
| WSPF-THS |
Thermocouple converter |
1 |
| WSPF-THW |
Thermocouple converter |
2 |
| WSPF-RTS |
RTD converter |
1 |
| WSPF-RTW |
RTD converter |
2 |
| WSPF-MS |
Potentiometer converter |
1 |
| WSPF-MSW |
Potentiometer converter |
2 |
These are model families, not complete order codes. Confirm the permitted input range, output range and supply option for the selected model. Two-output models serve two receiving devices from the same measured input.
Choosing the Converter Function
- DC signal isolation: use an isolator when the task is to separate and condition an existing measurement signal.
- Fast-changing signals: assess the DE or DEW against the response required by the complete measurement system.
- Transmitter loops: check the DBZ or DBZW when the transmitter also requires a suitable loop supply.
- Temperature: match THS/THW to the thermocouple type, or RTS/RTW to the RTD type and wiring.
- Position feedback: match MS/MSW to the potentiometer and its resistance specification.
Isolators
| | Isolator | Isolator | 2-output isolator |
|---|
| Model |
WSPF-IS |
WSPF-DS |
WSPF-DSW |
|---|
| Reference accuracy |
±0.1% fs (23°C) |
|---|
| Response time |
Approx. 25 ms (0 to 90%) |
|---|
| Isolation |
Mutually isolated between the input, output, and power supply terminals |
|---|
| Power supply voltage |
AC 100 to 240 V ± 10%, DC 24 V ± 10%, DC 10.8 to 30 V, DC 110 V ± 10% |
|---|
| Insulation resistance |
100 MΩ or higher (DC 500 V) (mutually isolated between the input, output, and power supply terminals) |
|---|
| Withstand voltage |
AC 3000 V for 1 minute (between the power and input/output terminals), AC 2000 V for 1 minute (between the input and output terminals) |
|---|
| Recommended temperature and humidity range |
- 5°C to + 55°C, 90% RH or less (no moisture condensation) |
|---|
| Dimensions (mm) |
84 (H) × 23 (W) × 106.5 (D) |
84 (H) × 29.5 (W) × 106.5 (D) |
|---|
Distributor (Current Loop Supply)
| | Insulation distributor | 2-output insulation distributor |
|---|
| Model |
WSPF-DBZ |
WSPF-DBZW |
|---|
| Input signal |
DC 4 to 20 mA (transmitter signal) |
|---|
| Reference accuracy |
± 0.1% fs (23°C) |
|---|
| Response time |
Approx. 25 ms (0 to 90%) |
|---|
| Power supply for transmitter |
DC 24 V ± 1 V, up to approx. 25 mA
DC30V ±1V,up to approx.25mA (only 1output type) |
|---|
Thermocouple Converter
| | Thermocouple converter | 2-output thermocouple converter |
|---|
| Model |
WSPF-THS |
WSPF-THW |
|---|
| Input signal |
JIS compliant thermocouple |
|---|
| Reference accuracy |
±0.2％ fs(23℃） |
|---|
| Response time |
Approx. 25 ms (0 to 90%) |
|---|
| Cold junction compensation accuracy |
± 0.5°C or less (± 1°C or less for R and WR thermocouples) |
|---|
| Burnout |
Upscale burnout |
|---|
RTD converters
| | RTD converter | 2-output RTD converter |
|---|
| Model |
WSPF-RTS |
WSPF-RTW |
|---|
| Input signal |
Pt 100 Ω, 3-wire (span 50°C or higher)
JPt 100 Ω, 3-wire (span 50°C or higher)
Nickel 508.4 Ω at 0°C, 3-wire |
|---|
| Reference accuracy |
±0.1％ fs(23℃） |
|---|
| Response time |
Approx. 25 ms (0 to 90%) |
|---|
| Burnout |
Upscale burnout |
|---|
Potentiometer Converters
| | Potentiometer converter | 2-output potentiometer converter |
|---|
| Model |
WSPF-MS |
WSPF-MSW |
|---|
| Input signal |
3-wire potentiometer |
|---|
| Reference accuracy |
± 0.1% fs (23°C) |
|---|
| Response time |
Approx. 25 ms (0 to 90%) |
|---|
| Burnout |
Upscale burnout |
|---|
Accuracy and response figures apply under the manufacturer's stated conditions. Power choices are ordering options; a single unit does not necessarily accept every supply listed. Confirm the isolation arrangement between individual outputs where this matters to the installation.
Original Product Illustrations
Information to Include with Your Enquiry
- Input type and minimum/maximum signal or measurement values.
- Required output range and number of outputs.
- Available supply voltage and receiving instrument details.
- Required response speed and installation conditions.
- For replacement units, the full model code and a photograph of the existing label and socket.
Need Help Selecting a Signal Converter?
Contact Seacom with your signal requirements and connected equipment. We can help compare the WSPF options and check the appropriate model configuration for your application.
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