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