Chapter 1. General description.
L-Card presents a data collection system
E-502
on the basis of USB and Ethernet interfaces.
E-502 –
is a system developed by LLC "L-Card". It is made on the basis of high quality production
of the company, it provides its own technical support and maintenance.
E-502 has the continuity of architecture with
: only the interface with the PC with the
same functionality as the L-502 is subjected to processing, except for the small functional
differences that will be discussed in this manual (s.
3.5
, p.
29
). The E-502 and L-502 software has
also has continuity (common library functions of the upper software level of the PC, identical to
the software at the Blackfin level).
The most important characteristics of E-502:
•
ADC: 16 bits, conversion frequency up to 2 MHz, with switching to 16 differential channels or 32
channels with common ground. Subranges: ±10 V”, “±5 V”, “±2 V”, “±1 V”, ±0.5 V, ±0.2 V.
•
Modification E-502-…-…-D has DAC support: 16 bits, 2 channels, output ± 5 V, asynchronous or
synchronous mode with a conversion frequency of up to 1 MHz for each channel.
•
Digital input: up to 17 digital inputs of general purpose, asynchronous or synchronous data output
mode with a frequency of up to 2 million words per second.
•
Digital output: up to 16 digital outputs of general purpose, with separate control of the output
resolution of the high and low byte, asynchronous or synchronous data output mode with a frequency
of up to 1 million words per second.
•
Processor (modification E-502-P-…) Blackfin 530 MHz, SDRAM 32 MB, the JTAG connector
allows to activate ready "advanced" signal processing and control functions inside the
E-502
or
independently to be engaged in low-level programming of these functions.
•
Galvanic isolation provides isolation of digital and analogous signal inputs/outputs to all computer
circuits.
•
The system can consist of one or more
E-502
modules, synchronized from each other, from an internal
or external synchronization source with an ADC conversion frequency of up to 1.5 MHz.
•
Design version "I" (E-502-…-…-…- I) has an industrial temperature range and a lacquer seal.
The
E-502
