Multi Port Serial Cards and Converters
The demand for serial cards has fallen sharply in recent years. Almost only spare parts for defective computers are needed. However, almost all blanks are still available from stock or on special order. Partly is still manufactured up-to-date - for other, rare cards is often still old stock available! For the identification the search on the web page is mostly helpful. Otherwise, I can usually identify each card with a photo. The lettering doesn‘t always help! Manuals and software can be found in the download section. 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).
PCIe boards are currently not available due to discontinued chipsets!
- 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
- 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
- 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.