Detailed descriptions
16.1 Motherboard
SIMATIC Box PC 627
16-10 Operating Instructions, Release 05/2006, A5E00362052-03
16.1.5 Front ports
Overview
Ports Position Connector Description
Display (LVDS) Internal X400 Connection of LCD displays with LVDS interface
(channel 1)
Display (LVDS) Internal X401 Connection of LCD displays with LVDS interface
(channel 2)
I/O front Internal X44 Ports for front I/O front,
including USB channel 1
USB Internal X42 Internal USB 2.0 interface
(USB channel 3)
Display interfaces
TFT displays with an LVDS interface can be connected to this interface. You can connect
18-bit displays with a resolution up to 1024x768 pixels on X400 only (single-channel LVDS),
and of 1280 x 1024 pixels on X400 and X401 (dual-channel LVDS). On the X401 there is
also +12VF as supply voltage for the backlight inverter (max. 4.2A) for 19" / Dual Channel
LVDS displays. The permitted display clock rate is 20MHz to 66MHz. The display is selected
automatically based on the code of the display select inputs.
The display supply voltages (3.3V and 5V) are switched via the graphics controller according
to the requirements of the connected displays. The maximum cable length is 50 cm at a
transmission rate of 455 MHz. Special cable properties are required for the differential cable
pairs specified by the LVDS specification.
Display interface (1st LVDS channel), X400
Pin–No. Short description Meaning Input/Output
1 P5V_D_fused +5V (fused) display VCC Output
2 P5V_D_fused +5V (fused) display VCC Output
3 RXIN0- LVDS output signal bit 0 (-) Output
4 RXIN0+ LVDS output signal bit 0 (+) Output
5 P3V3_D_fused +3.3V (fused) display VCC Output
6 P3V3_D_fused +3.3V (fused) display VCC Output
7 RXIN1- LVDS output signal bit 1 (-) Output
8 RXIN1+ LVDS output signal bit 1 (+) Output
9 GND Ground -
10 GND Ground -
11 RXIN2- LVDS output signal bit 2 (-) Output
12 RXIN2+ LVDS output signal bit 2 (+) Output
13 GND Ground -
14 GND Ground -
15 RXCLKIN- LVDS clock signal (-) Output
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