Siemens SIMATIC Box PC 840 Manual page 25

5 Ethernet
RJ 45-Ethernet connector. Ethernet is a local network with a bus structure for data
communication with a data transfer rate of 10 or 100 megabits per second (Mbps).
6 USB
Universal Serial Bus connector. You can use the USB port to connect external
devices, for example, CD drives, printers, modems as well as mouse and
keyboard. Older operating systems do not support this port.
7 COM2
You can use the serial port 2 (V.24) to connect devices with a serial port such as
modem, mouse or printer.
8 Keyboard
Connection for a PS/2 keyboard.
9 Reset
The reset button can be actuated with a thin pen (for example, an opened up paper
clip). If you actuate the button, a hardware reset is triggered. The PC restarts. Data
loss is possible with a hardware reset.
10 Mouse
PS/2 socket for connecting a PS/2 mouse.
11 LPT1/Printer
The parallel port connection for devices with parallel port, for example, printer.
12 VGA
You can connect an external VGA monitor to this connector.
Caution
Ensure that you use shielded cables and metal plugs to connect the peripheral
units; if this is not done, the approval for operation will be invalid! Screw down the
plugs of the interface cables to the PC housing by means of a screwdriver. You
thereby improve the electrical shielding.
13 PCI Slots
Internal slots for expansion modules.
14 PCI/ISA Slots
Internal slots for expansion modules.
15 ISA Slot
Internal slot for an ISA expansion module.
If expansion modules have been inserted in the PC, there are additional ports.
Please refer to the description of the respective module for their purpose.
SIMATIC Box PC 840 Manual
A5E00085984-04
Welcome to the SIMATIC Box PC 840
2-3