Flexible Payment Modes
Supports STS token, currency prepaid and post-paid modes, configurable through communication.
DDSY-T02 4G Single-Phase STS Prepayment Meter
DDSY-T02 4G is a single-phase two-wire STS prepayment energy meter with integrated 4G GPRS communication (2G/3G compatible). It supports three operation modes — STS token, currency prepaid and post-paid — with magnetic latching relay, 8 tariffs/8 time periods, multi-type anti-tamper detection and event logging. Class 1.0 active energy accuracy, DLMS/COSEM protocol.
Wall / Suspension Mounted
1P2W Direct Connection
GPRS Communication
5(100) A Maximum current
230 V Rated voltage
Class 1.0 Active energy accuracy
−20°C to +70°C Operating temperature
Product Highlights
Smart Prepayment Metering with Remote Communication
Class 1.0 Active Energy Accuracy
Class 1.0 active-energy and Class 2.0 reactive-energy measurement in accordance with IEC 62053-21.
4G / LTE Remote Communication
Supports 4G/LTE cellular communication with 2G/3G fallback, together with DLMS/COSEM for remote meter reading and system integration.
Multi-Tariff Management
Supports 8 tariffs and 8 time periods with remote tariff switching for flexible billing.
Advanced Anti-Tamper Protection
Detects bypass, open cover, magnetic interference, abnormal voltage and reverse connection events.
Integrated Communication Module
Built-in communication module design for compact installation and reliable remote connectivity.
Technical Specifications
Technical Specifications
| Voltage | 230 V |
| Frequency | 50 Hz |
| Rated current | 5(100) A |
| Start current | 40 mA |
| Pulse constant | 1000 imp/kWh |
| Power consumption | 10 VA / 2 W |
| Active energy accuracy | Class 1.0 |
| Reactive energy accuracy | Class 2.0 |
| Communication interface | GPRS (integrated modem) + IR |
| Communication protocol | DLMS/COSEM (IEC 62056) |
| Cellular fallback | 2G / 3G compatible |
| Optical port | IR (IEC 62056-21) |
| Downlink | RF or Bluetooth (UIU) |
| LCD display | 6+2, credit-based fixed display with short-code navigation |
| Metering function | Forward/reverse energy, total active/reactive energy, power, voltage, current, power factor, frequency, maximum demand |
| Operation modes | 1. STS token mode; 2. Currency prepaid mode (tariff/step price); 3. Post-paid (traditional) mode |
| Tariff | Weekday and weekend timetables, 8 tariffs and 8 time periods, with backup table and remote switching |
| Anti-tamper | Bypass detection, open cover detection, magnetic disturbance, current unbalance, phase/neutral reversal, live-neutral double circuit |
| Event logging | 225 events with date/time stamp, compartment-wise persistence |
| Relay | Magnetic latching relay for load disconnect on credit exhaustion or tamper |
| STS operation | 20-digit token entry via keypad or IHD; green = accepted, red = rejected |
| Operating temperature | −20°C to +70°C |
| Relative humidity | ≤95% |
| Applicable standards | IEC 62052-11 / IEC 62053-21 / IEC 62056-21 / IEC 62055-41 |
Structure & Dimensions
DDSY-T02 4G Dimensions & Wiring
Dimensions
Wiring
FAQ
Product FAQ
What is DDSY-T02 4G?
DDSY-T02 4G is a single-phase two-wire STS prepayment energy meter with integrated GPRS communication (2G/3G compatible). It supports three operation modes — STS token, currency prepaid and post-paid — with magnetic latching relay, 8 tariffs/8 time periods, multi-type anti-tamper detection and event logging. Class 1.0 active energy accuracy, DLMS/COSEM protocol.
What operation modes does DDSY-T02 4G support?
Three modes: STS token, currency prepaid and post-paid (traditional).
Is the modem pluggable?
No. The GPRS module is integrated.
What is the certification/standard basis?
Complies with IEC 62052-11, IEC 62053-21, IEC 62055-41 and related standards.
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