Siemens PANEL PC 877 operating instructions Front interfaces, Display interfaces

Detailed descriptions 17.1 Motherboard

17.1.5Front interfaces

Overview

Interface	Position	Connector	Description
Display (LVDS)	Internal	X300	Connection of LCD displays with
			LVDS interface (channel 1)
Display (LVDS)	Internal	X310	Connection of LCD displays with
			LVDS interface (channel 2)
I/O front	Internal	X44	Interface for I/O front
COM2	Internal	X33	Internal COM2 interface
USB	Internal	X2033	Internal USB 2.0 interface (USB
			channel 5)

Display interfaces

TFT displays with an LVDS interface can be connected to this interface. You may connect 18-bit displays with a resolution up to 1024x768 pixels on X300 only (single-channel LVDS), and of 1280 x 1024 pixels on X300 and X301 (dual-channel LVDS). X301 is also connected to a +12VF at max. 4.2. A power supply for backlight inverters for 17" / dual-channel LVDS displays. The permitted display clock rate is 20MHz to 66MHz. The display is selected automatically according to the coding of the display select inputs.

The display power supply voltages (3.3V and 5V) are switched via the graphic controller, independent of the requirements of the connected display units. The maximum cable length is 50 cm at a transmission rate of 455 MHz. Make allowances for the special channel features of differential line pairs with LVDS specifications.

SIMATIC Panel PC 877	17-13
Operating instructions, Release 07/2006, A5E00877780-01