Siemens SIMATIC Panel PC 870 Equipment Manual page 27

6 COM2
Serial interface 2 (V.24) for connecting devices with a serial interface, such as
modem, mouse or printer.
7 Keyboard
Connection for a PS/2 keyboard
7 Reset
The Reset key can only be pressed with the aid of a pointed object (for example,
elongated paper clip). Pressing the Reset key triggers a hardware reset. The
computing unit restarts.
Caution
There may be a loss of data with a hardware reset.
9 Mouse
PS/2 connector for connecting a PS/2 mouse
10 LPT1 / Printer
The parallel interface is intended to connect devices with parallel interface, such as
printers.
11 VGA
An external VGA monitor can be connected to this port (configuration in the BIOS
SETUP, submenu "Hardware Options", parameter CRT / LCD selection; see
Chapter 5).
12 PCI slots
Internal slots for PCI expansion modules
13 PCI/ISA slots
Internal slots for expansion modules
14 ISA slot
Internal slot for an ISA expansion slot
15 CD-ROM drive (piggyback version, option)
Using the CD–ROM drive, you can read data from CD–ROM.
If expansion modules are plugged in the computing unit, then there are further
interfaces. For their meaning, please refer to the description of the appropriate
module.
_________________________________________________________________________
1): By plugging on the "Gender Changer" (part of the documentation package), you will
change the connection into a 25-way V.24 standard interface for connecting devices
with serial interface, such as modem, mouse or printer.
2): Equipotential bonding within a safety extra–low voltage circuit (SELV).
MPI/DP do not exist in the computing unit basic variant.
Panel PC 870 Computing Unit Equipment Manual
Edition 12/01
Connecting and Operating the Computing Unit
3-3