NewTrend · import and export energy metering
Product overview
The DDS238-2 measures active energy in single-phase two-wire AC circuits and displays total, import and export energy separately. The 10(100)A direct-connected meter combines a backlit LCD, a front display/reset button and an isolated pulse output in a two-module DIN-rail enclosure. It suits consumption monitoring and solar systems where imported and exported energy need separate readings.
Technical selection summary
| Model | DDS238-2 |
|---|---|
| System | Single-phase two-wire AC |
| Rated voltage | 220–230V AC |
| Rated / maximum current | 10(100)A; direct connection |
| Frequency | 50/60Hz |
| Accuracy | Class 1 |
| Minimum measuring current | 0.02A |
| Power consumption | <1W / 10VA |
| Display | Backlit LCD, 5+1 digits |
| Energy registers | Total, import, export and resettable period energy |
| Display codes | T00: total; T01: import; T02: export; EP: period energy; C: pulse constant |
| Reset control | Hold front button for 10 seconds to clear the period-energy register |
| Pulse output | S0 open-collector output, 5–27V DC, 27mA |
| Pulse constant | 1000imp/kWh for the illustrated 100A version |
| Mounting | 35mm DIN rail; two-module width |
| Dimensions | 100mm high × 36mm wide × 65mm deep |
| Additional drawing references | 51mm depth; 39.5mm section; 60mm base depth; 45mm front section |
| Standard marking | IEC62053-21 |
Total, import, export and period energy
The LCD sequence identifies total active energy as T00, imported energy as T01 and exported energy as T02. The EP screen provides a separate period-energy reading, while C shows the pulse constant. The blue backlight makes readings visible in distribution-board installations.
Front-button operation
Use the front button to step through the display sequence. Press and hold it for 10 seconds to reset the temporary period-energy reading to zero. This allows a new monitoring interval to begin while keeping the distinct total, import and export readings available.
Connection and pulse output
Connect line and neutral input at the lower terminals and the corresponding output at the upper terminals, following the diagram below. The separately marked S0 pulse output supports external pulse collection at 5–27V DC and 27mA. The illustrated 100A meter is marked 1000imp/kWh.
DIN-rail installation and dimensions
The enclosure clips to a 35mm DIN rail and occupies two modules, with 36mm width. Overall height is 100mm and depth is 65mm. The dimension drawing preserves the additional mounting and front-section references. Isolate the circuit before installing or servicing the wiring.
Typical applications
For residential and commercial submetering, local energy-use checks and solar import/export monitoring. Separate directional registers help distinguish energy consumed from energy returned to the supply.
