Multi Port Serial Cards and Converters
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The production of most serial cards has been stopped because of low demand in the meantime. Almost only spare parts for defective computers are still needed. But in many cases old stock is still available! For identification the search on the website is usually helpful. Otherwise I can usually identify each card by a photo. The labeling does not always help! Manuals and software can be found in the download. If not, I can certainly help
- ISA, PCI or PCIe Bus
- RS232 - RS 422 - RS 485
- Up to 4 cards in one system.
- Software: English manual with setting plan, connection plan and programming examples.
- Possibility of use on the operating systems WIN-7/8/10, Vista, Windows XP, Windows 2000, Windows 98, Windows NT, Windows ME, OS/2, DOS and Linux (dependent on board).
As happened a few years ago, the prices of the PLX chip on the PCI cards have increased drastically. A price increase of 18€ was unfortunately unavoidable!
RS-232
- RS232 +/-12 volts nominal (3V min, 15V max) 3 Wires used, TRANSMIT (Tx), RECEIVE (Rx) and COMMON
- This can only be used with a single device at each end of the wiring and is thus a One-to-One link
RS232 Boards
RS-422
- RS422 differential Mode signalling using two pairs of wires, one pair in each direction +/- 200mV signal required at the receivers. Signalling levels at the transmitter of 0 and 5 Volts
- Permits communication from one “master” device to many “slave” devices
- RS422 - always uses separate pairs of wires for communication in each direction
- Like RS232, but up to 1000m between RX an TX
RS-422 Boards
RS-485
- RS485 Differential Mode signalling using either one or two pairs of wires +/- 200mV signal required at the receivers.
- Signalling levels at the transmitter of 0 and 5 Volts.
- RS485 - has a maximum of 32 Standard Loads per link.
- RS485 - allows EITHER two pairs of wires for communication OR a single pair of wires for transmission in both directions.
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