Siemens PANEL PC 877 operating instructions Front interface for operator panels

Detailed descriptions 17.1 Motherboard

I/O front interface for operator panels, X44

This interface carries all signals required for the connection of operator panels in addition to the display and USB interface. The maximum cable length is 50 cm at a USB data rate of 12 Mbps.

Pin No.	Abbreviation	Meaning	Input/Output
1	GND	Ground	-
2	P12V	Inverter voltage supply	Output
3	BL_ON	Backlight ON (5 V = ON)	Output
4	P5V_fused	+5 V (fused)	Output
5	GND	Ground	-
6	P3V3_fused	+3.3 V VCC (fused)	Output
7	K_CLK	Keyboard clock channel	Output
8	K_DATA	Keyboard data channel	Input/Output
9	M_CLK	Mouse clock channel	Output
10	K_DATA	Mouse data channel	Input/Output
11	P5V_fused	+5 V (fused)	Output
12	USB_D1M	USB data channel 1	Input/Output
13	USB_D1P	USB data+, channel 1	Input/Output
14	GND	Ground	-
15	LCD_SEL0	Display type - Select signal 0	Input
16	LCD_SEL1	Display type - Select signal 1	Input
17	LCD_SEL2	Display type - Select signal 2	Input
18	LCD_SEL3	Display type - Select signal 3	Input
19	RESET_N	Reset signal (active low)	Input
20	Power button	Power button function front	Input
21	HD_LED	HD LED, anode with 1 kW in series on the	Output
		motherboard
22	DP_LED	MPI/DP LED, anode via 1 kohm in series on the	Output
		motherboard
23	Ethernet_LED	Ethernet LED, anode with 1 kW in series on the	Output
		motherboard
24	TEMP_ERR	Temperature error LED, anode with 1 kW in series	Output
		on the motherboard
25	RUN_R	Watchdog error LED, anode with 1 kW in series on	Output
		the motherboard
26	RUN_G	Watchdog OK LED, anode with 1 kW in series on	Output
		the motherboard

17-16	SIMATIC Panel PC 877
	Operating instructions, Release 07/2006, A5E00877780-01