Intelligent solutions for Smart City, IoT, utilities and streetlight professionals


  • The LTE/LoRaWAN/WiFi IoT switching module for rough environments

    The gridCPU module is a control module with three built-in relays and analogue input for a light sensor. Being designed to control streetlight from the control cabinet it is the ideal cost-effective module for basic control. The module uses either NB-IoT/LTE-M1/2G or LoRaWAN as a main communication carrier. It is designed for GridLight™ to provide the necessary functionality for optimal and safe streetlight control. The module consumes very low power making this a very feasible solution. The module is very generic and may be utilized for other control purposes.

    The module can be utilized by using either 2G/NB-IoT/LTE-M1 or LoRaWAN to communicate with the central GridLight™ server. The module also includes Bluetooth Low Energy (BLE) for configuration through a smartphone.

    The gridCPU module is the fifth generation module for streetlight management and control but can also be utilised for many other control applications.

    The software can be updated from a smartphone or over the network. Configurations are updated remotely from the server and stored on the gridCPU module. Enabling it to autonomously execute tasks like on/off schedules from a selection of predefined programs. It also includes a crystal-based high precision clock with a battery backup. Ensure precise streetlight control even if there is no communication or if the central server is unavailable.

    The gridCPU-LoRa module supports LoRaWAN Multicast to make sure all lights are turned on and off simultaneous. The module has an analogue input designed for a light sensor. This light level signal can be distributed to other modules through the GridLight™ server. The module has an OXI (Open eXpansion Interface) slot for future add-on functionality.

    • 2G/NB-IoT/LTE-M1 or LoRaWAN failures
      WiFi failures
      Bluetooth failures
      Photocell for streetlight control
    • gridCPU supports both 2G/NB-IoT/LTE-M1 or LoRaWAN with multicast and WiFi. It adds an extra layer of security to the system using Amplex Secure Keys.
    • The gridCPU module has a calendar and a real-time clock with battery backup, with an absolute maximum deviation of ± 7 seconds per 24 hours in the full temperature range. This is without synchronization with external units. Under normal conditions, clock deviation is automatically adjusted according to the Server which gives a maximum deviation of ± 1 second. The server timing is based on NTP.
    • Fully compatible with GridLight™ Advanced Programming Schedules:
      * Twilight calculation from longitude/latitude – with offset
      * Multiple on/off fixed schedules for events like earth hour or Christmas
      * Central light sensor activation through LoRaWAN multicast
      * Automatic on after power outage
    • Internal backup battery for clock.

    • For use with 2G, NB-IoT or LTE Cat-M1 (4G/5G) networks. Nano SIM-card socket and eSIM option.

    • For use with Multicast compatible LoRaWAN cloud solutions, including Amplex LoRaWAN gateway cloud, The Things Network, Loriot and Actility.
    • IEEE802.11b, 802.11g, 802.11n
    • Bluetooth Low Energy – BLE
    • Universal input 110 – 230 Vac. Absolute max 95 – 300 Vac. 47-63 Hz.
    • Analog input 0-10V, 4-20 mA (0-20mA) Input impedance = 510 Ohms (DC) Accuracy = ± 2% FSD
    • Three relays that are used for switching minor loads on and off directly and three-phase or larger loads via an intermediate breaker. One of the three relays provide both NO and NC functionality.
      Max switching voltage: 250 V AC/30 V DC (resistive). Max switching load: 3A.
    • Modbus connector on LTE module. Compatible with a range of digital power meters.
    • 3 OXI connectors for Expansion slot module on LoRaWAN module. Connectivity specifications depends on installed OXI module.

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