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Glossary
P
Parallel Interface
Information is transmitted a byte at a time via a parallel interface (port). This
means that the transmission rate is very fast. The programming devices have a
parallel interface (LPT) to connect a printer.
Password
See Access Protection
PC
Personal computer
PC Card
A PC Card is a removable device, approximately the same size as a credit card,
that is designed to plug into a PCMCIA slot. Release 1 of the PCMCIA specifica-
tion specified a Type I card that is 3.3 millimeters thick and is intended to be used
primarily as a memory-related peripheral. Release 2 of the PCMCIA specification
specifies both a 5-millimeter-thick Type II card and a 10.5-millimeter-thick Type III
card. Type II cards accommodate devices such as modem, fax, and network
cards. Type III cards accommodate devices that require more space, such as wire-
less communications devices and rotating storage media (such as hard disks).
PCI
Peripheral Component Interconnect (fast expansion bus).
PCMCIA
(Personal Computer Memory Card International Association). Association of about
450 computer companies with the aim of setting worldwide standards for
miniaturizing PC expansion cards and making their use more flexible, offering the
market a basis for development. Cooperates with JEIDA.
PG
Programming device
PG Interface
The PG (programming device) interface is a serial port; it is located on a CPU, a
CP/IP, or a coordinator module (PG-MUX) and is used to connect a programming
device. Some CPUs may have two PG interfaces as an option.
Glossary-10
SIMATIC Box PC 620 Manual
C79000-G7076-C639-04

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