LTR-EU-16 16-slot crate with interfaces USB 2.0, Ethernet and power supply

16-slot crate with interfaces USB 2.0, Ethernet and power supply
  • Certified configurable I/O device
  • Ethernet interface provides remote data acquisition
  • USB interface provides convenience for short-distance connection to a computer
  • Ability to operate in autonomous mode and to program the signal processor

Workstation with 16 slots for galvanically isolated LTR-modules, with two interfaces USB 2.0 (high-speed) and Fast Ethernet (100BASE-TX) and the synchronization interface.

Multifunctionality of LTR-EU-16 provides two interface connections and multiple configurations of the installed LTR-modules.

Ethernet interface allows you to enter data at any distance from the operator's computer and eliminates the need of additional remote computers. The ready-made remote data acquisition software significantly reduces the complexity of tasks implementing.

The additional feature of autonomous operation of the device and low-level programming of built-in signal processor Blackfin ADSP-BF537 expands the functionality and allows LTR-EU-16 to be used as stand-alone controllers in dynamic tasks with rigid time feedback.

Type Desktop (can be installed into a crate with a width of 19")
Maximum number of LTR modules to be installed 16
Dimensions (without the projecting parts of the connectors) 481x136x406 mm
Dimensional drawings (all dimensions in millimeters)
Front view
View from above

View from above



Left view
Back view LTR-EU-16-1 

Back view



Note: The back view of LTR-EU-16-3 is similar to LTR-EU-16-2 with accuracy to marking.
Power supply
Supply voltage of the crate ~220 V for LTR-EU-16-1 
~220 V/=12 V for LTR-EU-16-2 
~220 V/=27 V for LTR-EU-16-3
Maximum power consumption 150 W
Internal architecture
Interfaces USB 2.0 High Speed 
Fast Ethernet (100BASE-TX)
Maximum data transfer rate 16 MB/s (via USB 2.0 High Speed)
9 MB/s (via Ethernet)
Reference generator Frequency of 60 MHz, long-term frequency stability ±50 ppm under operating conditions
Processor type Signal processor Blackfin ADSP-BF537
Firmware update Yes
Additional possibility of low-level programming Provided by the user, it is possible to connect the JTAG emulator
FPGA type EP1С30 (firmware update by user)
Flash-memory Non-removable 2 GB (option)
Galvanic isolation of the crate

Isolation between the crate ground terminal and the contacts of module connectors up to 820 V (AC voltage of sinusoidal form with frequency of 50 Hz and average square value of 820 V for 1 min).

Galvanic isolation of Ethernet 1500 V  (50 Hz, 1 min)
External synchronization
Number of synchronization inputs 2
Number of synchronization outputs 2
Static parameters of synchronization inputs

• Logical "0" level is no more than 0.5 V
• Logical "1" level is not less than 2.4 V

(TTL-compatible inputs)

Parameters of synchronization outputs Correspond to CMOS/LVTTL logic with +3.3 V supply voltage (TTL-compatible outputs)

Sync connector

The circuits of the synchronization connector are not galvanically isolated. For a description of the signals, see the User's Guide.

For organization of galvanically isolated LTR-EU crate's interface, as well as the RS-485/422 interface, a RS-485/422-UART transceiver cable with galvanic isolation can be applied.


  • ltrapi_en.pdf (filesize: 604 618 bytes, date: 15.02.2018)

    Ltrapi basic library. Programmer's Guide.

  • ltr_cross_sdk_en.pdf (filesize: 551 553 bytes, date: 13.02.2018)

    Description of the software for Windows, Linux, FreeBSD and QNX.

  • ltr_en.pdf (filesize: 11 066 427 bytes, date: 25.12.2017)

    LTR modular DAQ system. User's Guide (revision 3.1.0).

    • General characteristics and principles of construction
    • Working with LTR crate
    • Overview of LTR crate architecture
    • LTR11 ADC module
    • LTR212 (M) strain measurements modules
    • LTR27 measuring module
    • LTR41, LTR42, LTR43 digital I/O and synchronization modules
    • LTR51 frequency meter module
    • LTR22 ADC module
    • LTR24 (-1, -2) ADC modules
    • LTR25 ADC module
    • LTR34 DAC module
    • LTR35 DAC module
    • LTR114 ADC module
    • LTR210 ADC module
    • LTR00 Dummy module
    • Low-level programming of LTR-EU crate
    • Specification
  • ltr_soft_getting_started_en.pdf (filesize: 269 974 bytes, date: 13.02.2018)

    Starting to work with DAQ system LTR. Questions about the software.

LGraph2 software package

  • (filesize: 26 786 707 bytes, date: 11.10.2021)

    LGraph2 is a free multi-channel data recorder for Windows. Version 2.35.20 provides the possibility of simultaneous data visualization and recording from the ADCs: L-502, L-780M, L-783, L-791, E-502, E14-140, E14-140M, E14-440, E-154, E20-10, LTR11, LTR114, LTR27, LTR212, LTR216, LTR22, LTR24, LTR25, LTR51. It requires an updated version of the LComp driver (from version 01.04.2010) and ltrserver (no lower than

Software for Windows

  • lcard-opc-setup.exe (filesize: 12 440 520 bytes, date: 09.04.2019)

    OPC DA Server for L Card data acquisition modules and LTR crate system. Version 1.0.10.

  • lcomp.exe (filesize: 6 342 216 bytes, date: 12.05.2021)

    Beta version. LCOMP library for Windows XP/Vista/Win7/Win8/Win10 32 and 64-bit versions with drivers. The installer and drivers are digitally signed. The library is built on the basis of modern WDM-drivers rewritten on WDF. It includes the WDM driver itself for L-CARD hardware, the DLL library with source code, programming examples, electronic description, etc. The LCOMP library provides support for almost the entire range of products: PCI boards, USB modules. ISA support is excluded.

    The library includes “L-Graph I” software. L-Graph I supports the following devices: L-1450, L-761, L-780, L-783, L-791, E14-140, E-154 and E14-440. Files recorded by L-Graph I can also be read and processed using the demo-version of PowerGraph v.3.X.

  • ltrd-setup.exe (filesize: 1 467 408 bytes, date: 19.08.2021)

    The ltrd service. Version Provides communication with LTR crates. It is a replacement for the LTRserver software while maintaining the compatibility of the program interface. ltrd is designed for the same purpose as LTRserver, but it is a service that runs when the system is started. The graphical interface to the service is provided by a separate LTR Manager program.

    Attention! Only one of the programs ltrd or LTRserver can work at a time.

  • ltrdll.exe (filesize: 1 328 600 bytes, date: 30.11.2021)

    Libraries for working with LTR crates and modules. Version 1.32.30.

  • ltrmanager_setup.exe (filesize: 9 751 808 bytes, date: 04.05.2021)

    LTR Manager software. Version 1.5.2. Graphical interface to the ltrd service. Provides an interface similar to the LTRserver interface when working through the ltrd service.

Firmware and BIOS


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