Dedicated modem designed to support Landis+Gyr meters

CU-PLP is a GSM-based remote data communication terminal designed to work with Landis+Gyr ZxG/ZxD/ZxQ meters. The modem is fitted inside a meter’s original terminal strip housing and incorporates an RS485 or RS232 serial interface with an RJ-12 connector for easy installation. Leveraging the proven GSM 2G/3G/4G technology, the CU-PLP line of modems are an ideal solution for the energy industry.


Key characteristics of the comander CU-PLP device include:

  • Dimensions: the modem is fitted inside the original terminal strip housing of a Landis+Gyr ZMx meter
  • IP protection rating: same as the meter’s IP rating following installation
  • Power supply voltage: 100 to 240 V AC or 12 V DC for the option powered from the RS232 interface
  • Operating temperatures: -25 to +60°C
  • Sealing: communications connectors, power cords, SIM card slot and antenna connector
  • Indicators: LEDs on the front of the housing

Radio communications

The broad range of comander CU-PLP modems can use GSM radio communications modules that support the following technologies:

  • Penta-Band LTE: 800/900/1800/2100/2600 MHz, FDD Band (20, 8, 3, 7, 1)
  • Tri-Band UMTS/HSPA (WCDMA): 900/1800/2100 MHz, FDD Band (8, 3, 1)
  • Dual-Band GSM/GPRS/EDGE: 900/1800 MHz


CU-PLP modems support a range of useful features:

  • Support of TCP/IP, UDP/IP, ICMP, Telnet
  • Transparent handling of data from the serial interface
  • Powerful feature set to support electricity meters (including time synchronization and automatic protocol recognition)
  • Real-time clock with battery backup; clock synchronization via NTP or from the GSM
  • Remote and local hardware and software restart feature
  • Proprietary algorithms to monitor key quality metrics of the entire communication channel in TCP/IP mode and GSM mode: Link Control and GPRS Control
  • Device configuration access security controls
  • Internal event log
  • Built-in IP address filter to support whitelisting and blacklisting for inbound connections
  • Optional ability to send alerts when power is lost/restored (built-in power source)
  • Compliance with industry standards in terms of technical and security specifications


As standard, comander CU-PLP modems come with the following features:

  • RS485 or RS232 serial interface (RJ-12)
  • Additional RS485 serial interface connector (terminal block)
  • mini USB 2.0 configuration port
  • SMA antenna port
  • SIM card slot (2FF USIM)
  • Potential-free input