B&R Industries Provit 5000, User Manual

Page: 376 / 400

Provit 5000 User’s Manual 375
Chapt
er
8
T
ec
hnic
al
A
p
pendix
Technical Appendix • Glossary
System Units
Provit system units consist of a mainboard (without processor), slots for RAM modules, VGA
controller, serial and parallel interfaces, and connections for the FPD, monitor, PS/2 AT
keyboard, PS/2 mouse, USB, Ethernet (for system units with Intel Celeron and Pentium III
processors), Panelware keypad modules and external FDD.
Keypad Modules
Keypad modules are divided into two groups: Standard Keypad Modules (can be daisy chained
to a controller) and Special Keypad Modules (must be connected by an electrician according
to the function e.g. Emergency Stop)
TFT Display
An LCD (Liquid Crystal Display) technology where the display consists of a large grid of LCD
cells. Each pixel is represented by a cell, whereby electrical fields produced in the cells are
suppported by thin film transistors (TFT) resulting in an active matrix. In the simplest form, there
is exactly one thin film transistor per cell. Displays with an active matrix are generally used in
laptops and notebooks because they are thin, offer high quality color displays and can be viewed
from all angles.
TXD
An abbreviation for »Transmit (TX) Data« A line for the transfer of serial data sent from one
device to another - e.g. from a computer to a modem. For connections complying with the RS-
232-C standard, the TXD is controlled by connection 2 of the plug.
UART
An abbreviation for »Universal Asynchronous Receiver-Transmitter« Generally, a module
consisting of a single integrated circuit, which combines the circuits required for asynchronous
serial communication for both sending and receiving. UART represents the most common type
of circuit in modems for connection to a personal computer.
UDMA
An abbreviation for »Ultra Direct Memory Access« A special IDE data transfer mode that allows
high data transfer rates for drives. There has been some variations in the recent times.
The UDMA33 mode transfers 33 megabytes per second.
The UDMA66 mode transfers 66 megabytes per second.
The UDMA100 mode transfers 100 megabytes per second.
A condition for modifications is that both the mainboard and the hard drive support the
specification.