Watanabe TW-2X Two-Output DC Signal Isolator
The Watanabe TW-2X accepts a DC voltage or current signal and provides two proportional DC outputs. It is useful when one measurement signal needs to serve two receiving devices, such as a PLC and a recorder, subject to matching their signal and load requirements.
Powered by 24 V DC, the TW-2X combines the converter and terminal block in a compact unit for instrument-panel installations.
Key Features
- One DC voltage or current input with two DC outputs.
- Signal isolation and proportional conversion.
- Accuracy of ±0.1% of full scale.
- 50 ms response time from 0 to 90%.
- Integrated terminal-block construction.
Technical Specifications
| Specification | TW-2X |
|---|
| Input |
DC voltage or DC current |
| Output |
Two outputs; DC voltage/current according to ordering specification |
| Power supply |
24 V DC |
| Accuracy |
±0.1% FS |
| Response time |
50 ms, 0–90% |
| Dielectric strength |
2000 V AC |
| Dimensions |
98 × 48 × 41 mm (H × W × D) |
| Weight |
Approximately 130 g |
| Operating temperature |
−5 to +50°C |
| Operating humidity |
90% RH or below |
FS means full scale. Specify the input range and both output ranges when ordering. Check the applicable load limits and wiring arrangement for the complete model code.
Using One Signal with Two Instruments
A typical arrangement sends one output to the control system and the other to a display or recording device. Both outputs represent the same measured input; this is not a two-input measurement instrument.
| Connection | Application example |
|---|
| Input |
DC measurement signal from a compatible transmitter or signal source. |
| Output 1 |
Signal to a PLC or controller for process control. |
| Output 2 |
Signal to a recorder or indicator for monitoring. |
Confirm the required isolation between circuits against the manufacturer’s connection diagram, especially when the receiving devices have different grounding arrangements.
Original Specification Reference — Part 1
Original Specification Reference — Part 2
Selection and Ordering
- Input signal: provide the signal type, minimum and maximum values, and source instrument.
- Both outputs: identify the signal range and input requirements of each receiving device.
- Power: confirm that a suitable 24 V DC supply is available.
- Connections: confirm the required terminal or connector arrangement.
- Existing installations: include the complete model code and photographs of the label and wiring terminals.
Related Signal Isolators
For applications requiring one output, compare the Watanabe TZ-1XA and TZ-5XA DC signal isolators.
Need Help Selecting a Two-Output Isolator?
Contact Seacom with your input signal, both required outputs and connected equipment. We can help check the configuration for your measurement and control application.
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