Siemens PANEL PC 877 Internal interfaces, Pin assignment of the internal interfaces

Detailed descriptions 17.1 Motherboard

17.1.6Internal 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-	Internal	X10	170h–177h, 1F0h–1F7h, switchable
packed)			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	Internal	X42	Power supply for equipment fan, 3-pin
equipment fan			male connector
Backup battery	Internal	X49	Power supply for backup battery, 2-
			pin male connector
Power supply	Internal	X45	Additional power supply connector for
connection for 19" front			19" fronts
components with 12 V
DC power supply

17-18	SIMATIC Panel PC 877
	Operating instructions, Release 07/2006, A5E00877780-01