Detailed descriptions
17.1 Motherboard
SIMATIC Panel PC 877
17-18 Operating instructions, Release 07/2006, A5E00877780-01
17.1.6 Internal interfaces
Pin assignment of the internal interfaces
Interface Position Connector Description
Memory Internal X3, X4 2 DIMM sockets, 64-Bit
Processor Internal X1 Socket for FCPGA mobile processor
Bus expansion Internal X20 Socket for bus expansion, assigned
with ISA and PCI bus signals
Power supply Internal X50, X5000 20-pin power supply connector
ATX 12 V expansion
Floppy Internal X26 One drive is possible (82078
compatible)
360 K, 720 K, 1.2 MB, 1.44 MB
3F0h–3F7h, 370h–377h, switched
IRQ 6, edge triggered
34-pin socket for standard FD drive
3.5" hard disk drive Internal X7 170h–177h, 1F0h-1F7h, switchable
IRQ 14, IRQ 15, edge triggered
40-pin, 2.54mm male connector (3.5"
HD, primary), up to two drives can be
operated
CD-ROM, (back-
packed)
Internal X10 170h–177h, 1F0h–1F7h, switchable
IRQ14, IRQ15, edge triggered
44-pin, 2 mm male connector
CD-ROM, integrated Internal X12 170h–177h, 1F0h–1F7h, switchable
IRQ14, IRQ15, edge triggered
1 x 41-pin (Hirose DF9-41, CD-ROM,
Master)
PS circuit for CPU fan Internal X41 Power supply for CPU fan, 3-pin male
connector
PS connection for
equipment fan
Internal X42 Power supply for equipment fan, 3-pin
male connector
Backup battery Internal X49 Power supply for backup battery, 2-
pin male connector
Power supply
connection for 19" front
components with 12 V
DC power supply
Internal X45 Additional power supply connector for
19" fronts
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