PCI - digital I / O cards TTL

PCI - TTL inputs and outputs for the PCI bus from Messcomp®

What is TTL?

The term TTL is the abbreviation for transistor-transistor logic. It is a circuit technology for logic circuits in which bipolar NPN transistors are used as active components. The best-known representatives of this IC series are the LS series with, for example, SN74LS00 etc. The logic family is out of date and has practically no meaning today. Today the term TTL inputs / outputs is used for pure logic inputs / outputs, which normally have no potential separation and at whose inputs and outputs certain voltage levels or logic levels are defined for a signal.

PCI PC cards with TTL inputs and outputs

The wasco® PCI cards from Messcomp® with up to 168 TTL inputs / outputs are ideal for use in the laboratory. The TTL inputs are implemented with TTL modules or with the 8255 (82C55, 71055) interface module, depending on the type of PC card. In the version with TTL modules, up to 160 inputs and 160 outputs are possible, with the PC cards with 8255 modules up to 168 channels. These channels of the 8255 module can be programmed in groups of 8 as inputs or outputs. The TTL inputs / outputs of the PCI cards work with a level range of 5V. With expansion modules (KM series) these inputs / outputs can be equipped with galvanic isolation. Potential-free switching of signals and loads is also possible via KM modules with relays.The TTL PC cards can be integrated into the PC via the PCI slots and offer a large number of channels in a small space. Because of the very high number of channels of up to 168 channels, they are often used in laboratories for data acquisition. The PC cards with PCI bus are increasingly being replaced by revised versions with PCI Express bus. Various of the wasco PCI bus cards are also available from us in pin-compatible versions as PCIe bus versions. For new developments, we recommend usingVarious of the wasco PCI bus cards are also available from us in pin-compatible versions as PCIe bus versions. For new developments, we recommend usingVarious of the wasco PCI bus cards are also available from us in pin-compatible versions as PCIe bus versions. For new developments, we recommend using PCIe bus cards TTL from Messcomp® .