SO Pulse Output
Measures direct-connected single-phase circuits up to 100 A without an external CT.
DEM2A001 100 A Single-Phase DIN-Rail Energy Meter with SO Pulse Output
DEM2A001 is a single-phase, direct-connected DIN-rail energy meter for 1P2W systems, with a maximum current of 100 A. As the output-only variant, it provides one SO Pulse Output for connection to compatible pulse-counting equipment. It supports multiple import/export energy calculation modes, has no communication interface or tariff functions, and is MID B+D certified by SGS UK.
DIN-Rail Mounting (2P (36 mm))
1P2W Direct Connection
MID B+D Certified
MID
100 A Maximum current (Imax)
120–230 V Rated voltage
Class 0.5 Active energy accuracy
−40°C to +70°C Operating temperature
Product Highlights
100 A Direct-Connected Metering with SO Pulse Output
Class 0.5 Active Energy Accuracy
Class 0.5 active-energy and Class 1 reactive-energy measurement in accordance with IEC 62053-21.
Flexible Energy Calculation
Supports forward, reverse, absolute-value, algebraic-sum and net-energy calculation modes for flexible submetering applications.
100 A Direct-Connected Metering
Supports single-phase 1P2W direct connection with a maximum current of 100 A, without requiring an external CT.
Full-Parameter Measurement
Measures voltage, current, frequency, active and reactive power, power factor and energy, and calculates current and voltage harmonic content.
Compact 2P DIN-Rail Design
Uses a compact 36 mm-wide, 2P housing for standard 35 mm DIN-rail installation, with an operating temperature range of −40°C to +70°C.
Applications
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Explore ApplicationTechnical Specifications
Technical Specifications
| Voltage connection | Direct-connected |
| Rated voltage | 120-230 V |
| Voltage tolerance | 0.8 to 1.15 Un |
| Frequency | 50/60 Hz |
| Current connection | Direct-connected |
| Basic current (Ib) | 5 A |
| Minimum current (Imin) | 0.15 A (MID) / 0.25 A (IEC) |
| Maximum current (Imax) | 100 A |
| Power consumption | ≤2 W / 10 VA |
| Pulse constant | 1000 imp/kWh |
| Voltage | ±0.5% |
| Current | ±0.5% |
| Frequency | ±0.5% |
| Active power | ±0.5% |
| Reactive power | ±1% |
| Active power accuracy | Class 0.5 |
| Reactive power accuracy | Class 1 |
| Output type | 1 x SO Pulse Output |
| Integration note | For compatible pulse-input devices and data-acquisition systems. |
| Mounting / wiring | 35 mm DIN rail; 1P2W direct connection |
| Housing dimensions | 36 x 94 x 62.4 mm |
| Operating / storage temperature | -40 °C to +70 °C |
| Relative humidity | ≤95%, non-condensing |
| Ingress protection | IP20 |
| Overvoltage category | OVC III |
| Protection class | Class II |
| Rated impulse voltage | 6 kV |
| LCD / LED | Backlit LCD; red pulse LED; LCD refresh time 500 ms |
Structure & Dimensions
DEM2A001 Dimensions & Wiring
Dimensions
Wiring
FAQ
Product FAQ
Does the DEM2A001 require an external CT?
No. DEM2A001 is a direct-connected single-phase energy meter designed for 1P2W circuits up to 100 A. It does not require an external current transformer when the circuit current remains within the meter’s specified input range. The final wiring and current rating should be checked against the actual installation conditions.
Does the DEM2A001 support RS485 or Modbus communication?
No. DEM2A001 is a pulse-output model and does not include RS485, Modbus RTU or DL/T 645 communication. It provides one SO Pulse Output for connection to a compatible pulse-input device or data-acquisition system. For projects requiring digital communication, another YTL model should be selected.
What is the SO Pulse Output on the DEM2A001 used for?
The SO Pulse Output provides energy pulses that can be counted by a compatible pulse-input device, data logger or monitoring system.
Is DEM2A001 MID certified?
Yes. DEM2A001 is MID certified. Verify the applicable model scope on the YTL Certificates page or contact YTL for documentation.
What energy calculation modes does the DEM2A001 support?
DEM2A001 supports multiple energy-calculation modes, including forward, reverse, absolute-value, algebraic and net-energy calculation.
Where is the DEM2A001 typically used?
DEM2A001 is suited to compact single-phase metering applications that require direct measurement up to 100 A and pulse-based data collection. Typical uses can include electrical panels, C&I submetering, internal energy allocation and other projects where RS485 communication is not required.
Product Downloads
Product Datasheet Download
Datasheet
DEM2A Series Product Datasheet
Official DEM2A series datasheet covering product overview, specifications, wiring and dimensions.
Download PDF- Product overview and features
- Technical specifications
- Wiring diagrams and dimensions
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