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Optocoupler cards from bmcm: Measure, monitor, and control digital signals with galvanic isolation

FROM FRANK SCHLENNER most read

Optocoupler cards from bmcm: Measure, monitor, and control digital signals with galvanic isolation Maisach/Munich/Germany. The digital connector boards OI16 and OR8 by BMC Messsysteme GmbH (bmcm) adjust digital signals to the TTL inputs of a PC data acquisition and control system electrically isolated.

If there is no electro-conductive contact between two circuits, we are talking about galvanic or electrical isolation. Amongst others it is required for safety reasons (e.g. to control engines), to separate potentials or prevent hum loops as well as electromagnetic interferences.

If galvanic isolation is accomplished by optocouplers, digital signals can be transmitted fast and without interferences by light.

In measurement and control technology, optocoupler cards serve as a link between the digital line (e.g. of a machine) on one side and the PC data acquisition and control system on the other side.
The optocoupler cards of the measurement specialist BMC Messsysteme GmbH (bmcm) convert digital states of facilities (on/off) into TTL signals to be connected to the input of a PC measurement system. 24V-signals of an SPS, for example, can easily be connected in this way or engines can be controlled by the TTL outputs of the PC control systems.
Due to the galvanic isolation of the optocoupler boards, the digital lines have no electrical influence to each other or to the PC. The entire measurement system is optimally protected against high potentials and other disturbances.
Depending on the demands, two revised versions are available at bmcm.

Many channels but still extremely compact: The OI16 (10cm x 10cm) provides 16 digital inputs and 16 digital outputs at a 37-pin female for the connection of digital sensors (e.g. switch) or digital control lines (e.g. of a machine, etc.). The 16 switching outputs controlled by TTL signals of the PC measurement system feature output high-side drivers for voltages in the range of 7..35V.

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The euroboard size OR8 is more than a highly universal optocoupler card for eight voltage inputs in the range of 5-30V. In addition, higher voltages and currents of up to 60V, 6mA can be switched. The digital inputs, as well as the power supply with 9-40V or 5V, are connected at screw-clamp terminals.

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Accessory parts for DIN rail mounting are included with delivery. The TTL-compatible signals to the DAQ and control system of both cards are connected at a D-Sub 25 female. Using the optocoupler boards in combination with the digital I/O system USB-PIO from bmcm is especially comfortable, as a standard D-Sub cable is sufficient for connecting.
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A practical solution and absolutely undisturbed - that's for sure: Optocoupler boards from bmcm for digital applications.

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BMC Messsysteme GmbH
Hauptstrasse 21
82216 Maisach /Munich
GERMANY

Phone: 0049-8141-404180-2
Fax: 0049-8141-404180-9

*** About BMC Messsysteme GmbH (bmcm) ***

BMC Messsysteme GmbH was founded in 1994 as an independent corporation with headquarters in Maisach, app. 30 km west of Munich. bmcm is one of the only German companies completely developing and producing in Germany. The products of data acquisition and PC measurement from BMC Messsysteme GmbH stand for quality "made in Germany". A high value is set on keeping an excellent price-performance ratio. Since establishing a direct distribution in July 2006, customers have been able to profit from the advantage of direct contact to the manufacturer.

BMC Messsysteme GmbH serves the following business areas:

* Data acquisition components and PC measurement technology *
This comprises a wide range of connection systems, measuring amplifiers, data acquisition cards (internal and external), "all-in-one" data acquisition systems, data loggers, and the appropriate software for visualization, recording, and analysis.

* D2M (Design to Manufacturing) and OEM products *
BMC Messsysteme GmbH develops and produces electronic components according to customer specifications.

You will receive high-quality products manufactured already since the beginning of 2006 according to the RoHS directive. Of course, the corresponding documentation and CE test is always included.
A German documentation is obligatory for us, as well as an English description to be available to our international customers.


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Article published on 23.02.2012


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