Description
3.6 Design
SIMATIC Rack PC 840 V2
Operating Instructions, Edition 05/2006, A5E00248055-04
3-9
3.6.3
Connecting elements
Interfaces
Layout of the interfaces on the rear of the device
Pos
Designation
Description
(1)
COM 1
Serial port 1 (V.24), 25-pin sub D socket
(2)
PROFIBUS/MPI
MPI interface (RS485, electrically isolated), optional 9-pin sub D socket
(3)
ETHERNET
RJ 45 Ethernet connection 10/100 Mbps
(4)
USB
USB-device connectors. Bottom USB port 1, top USB port 2.
(5)
COM2
Serial port (V.24), 9-pin sub D plug
(6)
KEYBOARD
Connection for a PS/2 keyboard
(7)
MOUSE
Connection for a PS/2 mouse
(8)
VGA
Connection for VGA monitor
(9)
LPT1
Parallel interface, 25-pin
Power supply
Position of the IEC power connector
Description
IEC power connector for the AC power supply to
the device. The allowable supply voltage is
120 V AC or 230 V AC