WM-E3S® Modem for Electricity Meters - Quick Reference Guide
Communication Properties
The WM-E3S® modems are AMR communication equipments with CDMA450, 2G, 3G, 4G LTE, LTE450, LTE Cat.M / Cat.NB capabilities for remote reading of electricity meters. The modem was specially developed for Elster® AS220, AS230, AS300, AS1440, AS3000, AS3500 electricity meters.
- Cellular module: according to the chosen internet module type
- SIM-card holder: replaceable push-insert SIM, 2FF type
- External antenna interface: SMA-M (50 Ohm) - internal & external connectivity also possible
- Serial connection: Elster® compatible RS232 data interface with connector outfit
Current, Consumption
The modems are powered internally with 230V from the meter's integrated connectors.
- Power supply: 100 - 230 VAC / ±15% at 50Hz ±5% Hz, wired connection from the electric meter via power wire connector (AC)
- Power consumption: 2.9W
- Rated current: stand-by current 18mA @ 100V, 9mA @ 230V; average current 26mA @ 100V, 13mA @ 230V
- Surge protection: from 4kV up to 12kV (IEC 60060-1:2010), 1 min
Design
- Plastic enclosure/cover, fits meter enclosure for easy installation
- Class II equipment, IP21 (PCB), IP53 immunity protection
- Temperature limits: Operational -25°C to +60°C; Storage -40°C to +80°C, 0 - 95% rel. humidity
Technical Design and Construction
- Dimensions (W x L x H) - PCB: 124 x 55 x 35 mm; Case: depends on meter type
- Can be connected to the meter by sliding into the communication module slot and sealed.
- Housing is assured by the electricity meter.
- Terminal case can be fixed with sealable screws under the meter's top coverage.
- CE certification and compatible with international and local national standards.
Main Features
- Meets manufacturer standards
- Sealed and separated from meter
- Assembled and fastened securely into meter enclosure
- Power supply from the metrology (AC power)
- Supports meter load management & disconnector functions
- Surge protection from 4kV up to 12kV
- "Push" and "Pull" operation modes supported
- P1 interface (RJ12 connector) with DSMR/DLMS protocol
- Data encryption
- Scheduled data sending or triggered by alarm
- Remote switch of meter operation mode
- Operates from private network with NAT; modem connects to HES (Head End System)
- Secure firmware upgrade
- Outage Management (monitors network outages with Last GASP SMS notification)
- RTC module with remote synchronization for Last GASP SMS notification
- Remote control tasks (modifying configuration)
- Security features: password-protected access, time management, calendar (with remote server and local RTC module)
- Configuration via: DMSet® software or WM-E Term® configuration software
Operation
- AMR communication equipment with wireless data transmitting capabilities
- Remote data readout: parameters, load profile, register values, identifiers, events, parameter changes, consumption amount
- Transparent data transmission with TCP/IP Stack network protocol to the HES
- Autonomous operation without a host system
- Continuous, always online operation for high availability (HA), accuracy, and stability
- Supports bidirectional communication between Measurement Point and Control Center, dual-dual mode and secure modes: wireless data sending (default), GPRS backup
- Independently controllable via serial interfaces
- Protocol independent, supports DLMS and EN62056-21 mode C
Installation Steps
For Elster® AS3000, AS3500
- Remove meter's communication module plastic case by releasing the top middle screw.
- Snap the modem unit PCB into the plastic housing, sliding it through guiding rails until it clicks. Ensure the PCB is near the screw and the 12-pin connector (3) is correctly oriented towards the SMA antenna connector (6).
- Push the PCB until locked and fixed. A hook in the housing secures the PCB. Force the hook to release the PCB.
- Connect the communication module to the meter by sliding it into the meter housing.
- Connect the communication interface (3) and mains connectors (1) to the meter's connector pairs.
For Elster® AS220, AS230
- Disassemble the meter's communication module plastic case; release the top screw and remove the cover.
- Insert the modem PCB into the transparent plastic housing of the communication modem.
- Mount the SMA-M antenna connector on the housing and fasten with its screw.
- Attach the communication modem to the meter housing. Connect the 12-pin interface (3) and mains connector (1) to the meter.
For Elster® AS1440
- Connect the external PCB adapter with the 12-pin ribbon cable to the modem PCB's 12-pin interface (3). The red wire should be towards the PCB edge. The meter provides communication/power via a 6-pin Elster®-customized interface adapter.
- Remove the meter's terminal cover housing the communication module and release the back cover to place the modem.
- Mount the SMA-M antenna connector on the modem's back cover and fasten with its screw.
- Insert the modem PCB into the terminal cover's housing, sliding it through guiding rails near fastening screws. Position the PCB and power supply module (10) on the right side. The 12-pin connector and wire should be oriented left.
- Push the modem PCB until locked and fixed. Fastening points in the terminal cover hold the PCB.
- Place the external power supply adapter PCB into the terminal cover case, oriented correctly. The 6-pin Microfit connector should be upwards, and the 12-pin wire to the left. Arrange the ribbon cable to avoid obstructing the cover.
- Replace the modem cover, fasten with locking tabs and screw. Insert the modem unit into the electricity meter. The 6-pin connector provides power and data.
Turn On the Device
After assembly, turn on the meter. The modem will start operation, indicated by LED signals. Download and read the full manual from the product website for configuration: https://m2mserver.com/en/product/wm-e3s/
Certifications
The device complies with CE certification directives and related international standards. The CE symbol indicates compliance with European regulations.
The symbol on the product or packaging signifies that, according to local laws and regulations, this product should not be disposed of in household waste but sent for recycling. Please take it to a collection point designated by your local authorities. By recycling, you help conserve the environment and protect human health.
LED Signals
| LED | Meaning |
|---|---|
| LED 1 | GSM/GPRS status |
| LED 2 | PIN status (ON=OK) |
| LED 3 | E-meter communication (DLMS active) |
| LED 4 | E-meter relay status |
| LED 5 | M-Bus status |
| LED 6 | Firmware status |
Important! LED 1 flashes faster when the device is successfully registered to a cellular network (3G, 4G LTE, etc.). LED 4 and LED 5 are available only in the M-Bus version.
Diagram Descriptions
Diagram 1 (Top Right): Shows various views of the WM-E3S modem PCB and its associated enclosure components, illustrating the product's physical design.
Diagram 2 (Middle Left): A detailed view of the WM-E3S PCB, with numbered callouts pointing to key components such as the SIM card holder (4), status LEDs (5), SMA antenna connector (6), U.FL antenna connector (7), Telit LTE module (8), backup battery (9), and power supply unit (10).
Diagram 3 (Middle Right): Illustrates the WM-E3S modem connected to an Elster electricity meter, showing the integration process.
Diagram 4 (Bottom Right): Displays the WM-E3S modem components, including the PCB, power supply module, and connectors, alongside an Elster electricity meter.
Diagram 5 (Bottom Left): Features the CE certification mark, indicating compliance with European standards, and a recycling symbol with accompanying text explaining proper disposal procedures.
