Siemens PC 670 - Manual (Page 192)

Glossary Release 04/02
Glossary-4 Panel PC 670 Computing Unit, Equipment Manual
MPI/DP port
(Multi-Point-Interface/Profibus-DP) for connecting an S7 programmable controller.
P
Parallel port
Information is transferred on a byte by byte basis through a parallel port. High data
transfer rates are achieved as a result. SIMATIC PCs have one parallel port (LPT)
for attaching a printer.
PC card interface
For connecting PC cards (types I/II/III).
PCI or PCI/ISA slot
(Peripheral Component Interconnect) for expansion boards.
PCMCIA
(Personal Computer Memory Card International Association). Association of
computer manufacturers formed with the aim of defining an international standard
for memory modules and PC expansion cards. Cooperates with JEIDA.
Port, parallel
Information is transferred on a byte by byte basis through a parallel port. High data
transfer rates are achieved as a result. SIMATIC PCs have one parallel LPT1 port.
Port, serial
Data are transferred bit by bit through serial ports. They are used in instances
where large distances have to be traversed with minimum cabling.
Printer interface
Parallel port, 25-pin, sub-D connectors, sockets. For attaching printers.
Programmable logic controller (PLC)
A controller in the SIMATIC S5 series (for example, AG S5-115U/135U).
R
RTC
Real time clock