Phone: +7 (495) 785-95-19
Universal I/O board for analog and digital signals to PC via PCI Express interface with the possibility of their digital processing in real time.
As an option, it is possible to install a two-channel 16-bit DAC with the possibility of synchronous output with a frequency of up to 1 MHz per channel.
ADC channels switching during multichannel data acquisition mode is automatic, with arbitrary channel sampling order, with a given measurement sub-range and averaging factor of ADC samples for each channel.
Installed in L-502-P powerful signal processor Blackfin (ADSP-BF523), running at a sampling rate of 530 MHz with a connected SDRAM 32 MB, allows a low-level programmer to implement his own algorithms that work in real time and are not dependent on the operating system. Almost all Blackfin performance (especially effective at DSP tasks) is given to user processing tasks, since all Blackfin interface transfers are implemented by DMA and Blackfin memory is directly displayed in PC memory. But, at the same time, the lack of Blackfin in the L-502-X does not interfere with the implementation of real-time algorithms using PC.
The high-tech architecture of the L-502 also uses the CPLD of Max II family and FPGA of Cyclone IV family.
The architecture of the L-502 was developed in the new E-502 external module with USB&Ethernet, software compatible with L-502. The same Blackfin software can be used in L-502 and E-502 . The architecture of the L-502 and E-502 at the Blackfin level is identical (there are minor differences, which are described in the E-502 manual).
L-502 high-speed synchronous data I/O has a wide range of applications. For example, based on the L-502, image input systems from CCD sensors with sensor control from L-502 can be built.
Compatible with L-780M, L-783M, L-791, L-502 and AC-7XX cables.
Reduces interference at digital lines.
Improves the quality of digital signals transmission.
Easy to mount.
Plug adapter for digital connector
of L-xxx boards
|Number of channels||16 differential or 32 with "common ground"|
|Effective resolution (for a sinusoidal signal of 10 kHz / 2 V peak-peak, the conversion frequency is 400 kHz)||15,0 bits (corresponds to SINAD = 92 dB)|
|Input impedance (at single-channel mode)||
|Input signal measuring sub-ranges||±10 V, ±5 V, ±2 V, ±1 V, ±0,5 V, ±0,2 V|
|Maximum conversion frequency||2 MHz
(1.5 MHz when synchronizing the conversion frequency from another L-502 board)
|The main error (referred to the range) of the DC voltage measurement||±0,05 %|
|Inputs protection||±15 V|
|Common-mode rejection ratio 50 Hz with amplitude 1 V in differential mode (by subbands)||
|The intrinsic input noise of ADC at the shorted input, depending on the sub-band of ADC and the averaging factor of the samples (K average) for each channel.||
|Inter-channel interference, dB||
|Digital signal processor (option)|
|Sampling rate||530 MHz|
|RAM||32 MB (SDRAM, 16 bits; 132,5 MHz)|
|Program interface with ADSP-BF523||Independent, via HOST DMA of ADSP-BF523 processor|
|The main interface for peripherals (ADC, DAC, digital I/O)||SPORT0, >120 Mbps, duplex|
|Galvanic isolation (option)|
|Galvanic isolation boundaries||Between all the circuits that ends to the contacts of the signal connectors and PC circuits. The metal housing of the DRB-37M connector is not galvanically isolated from the PC.|
|Test voltage of galvanic isolation||500 V for 1 min.|
|L-502 modifications, in which galvanic isolation is available||L-502-P-G, L-502-P-G-D, L-502-X-G, L-502-X-G-D|
|Number of voltage outputs with common ground||2|
|Frequency of output in synchronous mode||1 MHz per channel|
|Output modes||Synchronous (streaming) or asynchronous|
|Output range||±5 V|
|Operating range of output currents||0-10 mA|
|Total number of digital general-purpose inputs||18 (two of them can be used for synchronization)|
|Data entry modes||Synchronous, asynchronous|
|Pull-up resistors to a high logic level||Yes|
|Maximum speed in synchronous mode||2 MHz|
|Recommended operating voltage range||0 …+5,5 V|
|High-impedance state with power off||Yes|
|Maximum input current with power off||10 μA|
|Own input current in operating mode with software-activated pull-up resistors||10 μA|
|The resistance of pull-up resistors||2.2 kOhm relative to +3.3 V (pull-up resistors are programmatically switched-on for groups of inputs)|
|Total number of TTL-compatible digital outputs||16|
|Control of the third state of outputs||Yes|
|Data output modes||Synchronous, asynchronous|
|Maximum speed in synchronous mode||1 Msamples/s|
|Maximum permissible current in the load circuit||20 mA|
|Recommended current in the load circuit||Not more than 8 mA|
|Logical "1" level without load output||+3,3 V|
|Logical "0" level without load output||0…+0,1 V|
|Output resistance, typical value||110 Ohm|
|Maximum leakage current in operating mode in high-impedance state||±1 μA|
|High-impedance state with power off||No|
|Topology of multimodule connections over synchronization lines||Sequence (inside one PC system unit)|
|Maximum number of synchronized L-502 modules in sequence synchronization scheme||Equal to the number of PCIe slots in the PC motherboard|
|Maximum length of inter-module synchronization cable||40 cm (only to the neighboring PCIe slot)|
|Number of inter-module synchronization lines||2 twisted pairs|
|Interface to computer|
|Standard||PCIe x1 rev. 1.0 (the board is compatible with the PCI Express slot of the motherboard of any bandwidth: x1, x2, x4, x8, x12, x16, x32).|
|Maximum data transfer rate for PCIe||200 MB/s, duplex (physical throughput of the PCIe controller)|
|Resolution of the L-502 data sample for PCIe||32 bits|
|DMA support at BUS MASTER mode for PCIe||Yes|
|Design||PCI Express CARD x1 standard height, with bracket, less than half length (HALF LENGTH), in accordance with PCI Express Card Electromechanical Specification rev.2.0.
Requires one PCI Express slot.
|Overall dimensions of the PCB (length x height)||136 x 101 mm|
|General requirements||L-502 is designed for use in closed premises in accordance with the requirements of National Standart 22261 (group 3) with an extended range of operating temperatures.|
|External circuits power supply|
|Power supply outputs for external analog and digital circuit||+15 V, -15 V, +3,3 V. The maximum currents taken from the outputs are selected by the criterion of not exceeding the maximum load power according to the methodology in Manual.|
|Maximum power load, taken from all L-502 outputs||
Hardware description, assignment and connection of signals is given in the User's Guide.
Note on technically possible modifications of L-502: When ordering from 40-50 pcs. it is possible to produce a purely digital modification of L-502 at a reduced price without analog I/O ADC/DAC. On interest in such a modification of L-502, please contact Sales Department.
|board with no galvanic isolation, no DAC, no processor|
|board with DAC, no galvanic isolation, no processor|
|board with galvanic isolation, no DAC, no processor|
|board with galvanic isolation, with DAC, no processor|
|board with galvanic isolation, with processor, no DAC|
|board with galvanic isolation, with processor, with DAC|
LGraph2 is a free multi-channel data recorder for Windows. Version 2.35.00 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 188.8.131.52).
L-CARD L502/E502 SDK. Version 1.1.19. Includes driver, libraries, files for software development and programming examples for L-CARD L502 and E502 modules for Windows (starting with Windows XP SP3 and higher, including 64-bit versions).