K8000 - PC Interface Board Kit
To
enable a computer to communicate with the outside world, it is usually
fitted with a keyboard, a display and perhaps a mouse. If however it is to
be used in certain control applications, or certain control functions are to
be carried out, then an interface is needed.
The Velleman K8000 PC Interface Board excels
in its simplicity of use and installation. The card is connected in a very
simple way to the printer port (there is no need to open up the computer).
Likewise there is no need to install an extra printer port, even if a
printer is to be used. This can be connected to the card in the usual
manner. Connection to the computer is optically isolated, so that damage to
the computer from the card is not possible.
The card is controlled in a
simple way using Turbo Pascal, QBasic, Visual Basic, Delphi, C++ (to use
with MS-DOS, Win3.11, Win95, 98, ME, NT, XP, 2000). These procedures are
pre-programmed and are provided along with a number of test and example
programs on the diskette supplied.
The card itself has 16 optically isolated
digital connections, which can be freely chosen as either inputs or outputs
(e.g. 6 inputs and 10 outputs) according to how they are set up by the user.
Furthermore, the card has 9 analogue outputs, of which one is high
precision, and 4 analogue inputs. If this capacity is not sufficient for a
particular application then up to 4 cards can be connected together (1
master and 3 slaves), such that an enormous potential exists. The card can
be used with many of our other kits.
Features
- optically isolated from computer
- 16 optically isolated digital connections
- 9 analogue outputs, of which one is high precision and 4 analogue
inputs
- a simple way of controlling using Turbo Pascal, Turbo C, Qbasic,
Visual Basic
- printer bypass connector on board
- simple connection with printer port
Block Diagram
Specifications
- digital outputs:
- optocoupler, open collector output: 50mA - max. 30VDC
- digital inputs:
- optocoupler input: 5V/5mA, max. 20V/40mA
- analogue outputs:
- 8 outputs DAC1 to DAC8, resolution: 64 steps
- minimum output voltage: 0.1V at 2mA
- maximum output voltage: 11.5V adjustable at 2mA
- resolution per step from 0.1 to 11.5V: 160mV +/- 90mV
- 1 precision output DA1, resolution: 256 steps
- minimum output voltage: 0V
- maximum output voltage: 4.5V adjustable at 0.5mA
- resolution per step from 0 to 4.5V: 17.5mV
- analogue inputs:
- 4 analogue inputs AD1 to AD4, resolution: 256 steps
- minimum input voltage: 0V
- maximum input voltage: 5V
- input impedance: 50Mohm
- resolution: 19.5mV
- communication protocol: I²Cbus
- LED indication for each I/O
- 25 pin D series connector for computer
- 25 pin D series connector for printer
- supply voltage: 230Vac
- PCB dimensions: 237 x 133mm (9.3" x 5.2")
Files
To
enable a computer to communicate with the outside world, it is usually
fitted with a keyboard, a display and perhaps a mouse. If however it is to
be used in certain control applications, or certain control functions are to
be carried out, then an interface is needed.
