Flexible Payment Modes
Supports STS token, currency prepaid and post-paid modes, configurable through communication for flexible billing.
DDSY-T02 4G Single-Phase STS Wall-Mounted Prepayment Meter
DDSY-T02 4G is a single-phase two-wire STS prepayment energy meter with pluggable 4G GPRS communication (2G/3G compatible). It supports three operation modes — STS token, currency prepaid and post-paid — with magnetic latching relay for load control, 8 tariffs/8 time periods, multi-type anti-tamper detection and 225-event logging. Class 1.0 active energy accuracy, DLMS/COSEM protocol.
Wall / Suspension Mounted
1P2W Direct Connection
GPRS Communication
5(60) A Maximum current
230 V Rated voltage
Class 1.0 Active energy accuracy
−20°C to +70°C Operating temperature
Product Highlights
Plug-in Smart Prepayment Meter with 4G 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 with 2G/3G fallback and DLMS/COSEM. A PLC version is also available for selected projects.
Multi-Tariff Management
Supports 8 tariffs and 8 time periods with remote tariff switching for time-of-use billing.
Advanced Anti-Tamper Protection
Detects bypass, open cover, magnetic disturbance, current unbalance and phase reversal events.
Replaceable Communication Module
Pluggable 4G module design enables easy replacement and future communication upgrades.
Technical Specifications
Technical Specifications
| Voltage | 230 V |
| Frequency | 50 Hz |
| Rated current | 5(60) 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 pluggable 4G GPRS communication (2G/3G compatible). It supports three operation modes — STS token, currency prepaid and post-paid — with magnetic latching relay for load control, 8 tariffs/8 time periods, multi-type anti-tamper detection and 225-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 (tariff or step price) and post-paid (traditional). Modes are switchable and configurable via communication.
Is the 4G communication module pluggable?
Yes. The 4G communication module is pluggable for field replacement without disconnecting the meter. For a fixed communication variant, please confirm the applicable DDSY-T02 configuration during model selection.
What is the certification/standard basis?
Complies with IEC 62052-11, IEC 62053-21, IEC 62055-41 and related standards.
Is a PLC communication version available for DDSY-T02?
Yes. A PLC communication version of DDSY-T02 is also available for selected project configurations. The 4G version remains the primary configuration shown on this page. Please confirm the required communication version during model selection, as communication hardware and integration requirements may vary by project.
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