Logic IO Newsletter
August 29, 2021

More preeminent news from Logic IO!

In the last newsletter, we had the rare honor of introducing the RTCU LX5 series as the first member in a brand new product series based on an entirely new hardware platform, coined the LX hardware architecture!
The time has come to introduce yet another member of the LX family. We are now proud to present the new RTCU LX4 pro!

The RTCU LX4 pro is a powerful successor to the RTCU DX4i pro with significant improvements in features, capacity, power, and security. In addition, the RTCU LX4 pro is based on the latest LX hardware architecture, offering an unprecedented balance between price and performance.

The RTCU LX4 pro is positioned for a broad range of professional industrial Internet of Things applications. With onboard M-Bus / Wireless M-Bus and pulse counting inputs (S0), it is a perfect component in advanced Energy Management applications.

The device is based on the NX32L (NX32 for Linux) architecture, which embraces many new technologies and at the same time maintains full backward compatibility, which ensures already implemented and tested NX32 applications can execute without changes.

The RTCU LX4 pro is designed to meet the ever-increasing challenges on security, by offering full TLS on all major protocols and includes a hardened protected execution environment with dual-boot and automatic fallback and recovery.

The RTCU LX4 pro device is designed from the ground up for professional M2M / IIoT applications with strong onboard I/O capabilities and multiple communication interfaces such as a Worldwide LTE Cat.4 Cellular Engine, Wired and Wireless M-Bus, LAN, RS232, RS485, and 1-Wire.

The RTCU LX4 pro rests on the RTCU M2M Platform, that brings all the necessary tools together to develop, implement and maintain today’s sophisticated M2M/IIoT applications.

Technical Highlights for the RTCU LX4 pro:


  •  Based on the RTCU M2M Platform.
  •  NX32L (NX32 for Linux) execution architecture.
    •  RTCU IDE development tool.
    •  Operates under a full and highly optimized Linux variant.
    •  Open and extendable with the RTCU Platform SDK (under development).

LX hardware Core:

  •  Cortex-A7 32-bit ARM processor operating at up to 1 GHz.
  •  Cortex-M4 32-bit co-processor for advanced power-management.
  •  Hardware floating-point and DSP instructions.
  •  128 MByte RAM.
  •  256 MByte NAND Flash (system boot, persistent memory, and file-systems).
  •  Real-time clock with a dedicated backup battery.


  •  Embedded firewall with router functionality.
  •  Port forward and NAT services.
  •  TLS/SSL support with full certificate management.
  •  TLS/SSL support for all major TCP protocols, such as SMTP, MQTT, and sockets.
  •  Hardware assisted encryption/authentication.

Wireless Communication:

  •  LTE Cat. 4 Worldwide Cellular Engine.
  •  Internal SIM-card reader with support for eSIM.
  •  Optional: Wireless M-Bus. EN 13757-4/7 OMS EU/CE.

Wired Communication:

  •  100 Mbps Ethernet LAN interface.
  •  Wired M-Bus (EN 13757-2/3) interface with up to 20 slave devices.
  •  1-Wire bus for accessories such as ID-button reader, temperature sensors, etc.
  •  1 x RS232 channel handshake support.
  •  2 x RS485 channels.

I/O Interfaces:

  •  8 x digital inputs.
  •  Up to 4 digital inputs configurable as IEC62053-31 Class A compliant.
  •  4 x analog inputs with 0..10 volt / 0..20 mA with 12 bit resolution.
  •  2 x analog outputs with 0..10 volt / 0..20 mA.
  •  8 x high-power solid-state digital outputs.
  •  Expandable I/O with standard Modbus modules.

User Interaction:

  •  Graphical 144x32 pixels display with backlight.
  •  Keypad with 8 keys for sophisticated user interaction and control.
  •  3 x bi-colour, 1 x single colour LED.
  •  High-speed Mini-USB service-port connector.


  •   Temperature sensor.


  •  Fully digitized audio system.
  •  Transfer, store, and play audio.
  •  Digitized cellular audio.
  •  DTMF support for Interactive Voice Response applications.


  •  Internal flash drive with up to 64 MByte capacity.
  •  Persistent memory and circular datalogger.
  •  Standard SD-CARD reader.

Power and Battery:

  •  Operating voltage from 8 to 36 VDC.
  •  On-board 2 Ah Li-Ion battery with intelligent charging.


  •  Housed in a industry standard M36 DIN compliant encapsulation.
  •  Two-part pluggable connectors for easy installation and maintenance.

Regulatory Approvals:

  •  Radio Equipment Directive, RED 2014/53/EU.
  •  EMC Directive, 2014/30/EU.
  •  RoHS Directive, 2011/65/EU.

The full specifications, datasheets, and technical manuals for the RTCU LX4 pro can be found here, and for current users of the RTCU DX4i pro, we recommend taking a look at the comparison sheet here.

The RTCU LX4 pro and a Starter Kit are available to order NOW, with deliveries expected to start in early October.


For further questions or enquiries:

Logic IO ApS
Holmboes Allé 14
8700 Horsens
Telephone: +45 7625 0210
Fax: +45 7625 0211

if you want to be removed from our mailing list, then please press here: Remove