Detailed descriptions
16.1 Motherboard
SIMATIC Rack PC 847B
138
Operating Instructions, 06/2008, A5E02203168-01
16.1.5
Internal ports
Pin assignment of the internal interfaces
Interface
Position
Connector
Description
Memory
Internal
X19, X20
2 SODIMM sockets, 64-bit
Processor
Internal
X1
Socket for FCPGA processor
Bus expansion
Internal
X10
Bus expansion socket, used by PCI and
PCIe bus signals
Power supply
Internal
X9
4-pin 12 V ATX power connector
(CPU-VRM supply)
Fan monitoring
Internal
X130
Power supply fan monitoring
8-pin pin header
Floppy
Internal
X608
Two drives can be installed (82078
compatible) 360 KB, 720 KB, 1.2 MB,
1.44 MB 3F0h–3F7h, 370h–377h, IRQ 6
can be disabled, edge triggered 34-pin,
socket for standard floppy disk drive
SATA
Internal (hard
disk drive, for
example)
X5, 6, 7, 8
7-pin SATA connector, shielded
secondary EIDE
(DVD ROM, for example)
Internal
X612
170h–177h, 1F0h–1F7h, switchable
IRQ14, IRQ15, edge triggered 40-pin,
2.54 mm pin header, operation of up to
two disk drives
Connection for device fan Internal
X132, X131
Power supply, device fan monitoring
(controlled), 4-pin, pin header
Connection for SCSI LED Internal
X12
Input for SCSI drive activity display
Internal USB interface
Internal
X420
For connecting the USB cable to the front
panel of the computer
Front panel interface
Internal
X46
OP connection
Connection for power
supply fan
Internal
X130
Power supply fan monitoring, 8-pin, pin
header
RAID HDD Alarm
Internal
X11
2-pin plug, LED interface for
exchangeable hard disk or rack 1 and 2
Assignment of the SCSI activity connector, X12 Type JST B2B-PH-SM3-TB
Pin no.
Short name
Meaning
Input / output
1
NC
-
-
2
SCSI HD_N
0-V level means that the SCSI
interface is active
Input