Front Ports - Siemens SIMATIC 627B Operating Instructions Manual

Detailed descriptions
16.1 Motherboard
16.1.5

Front ports

Overview
Port
Display (LVDS)
Display (LVDS)
I/O front
USB
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 1024 x 768 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 +12 V as supply voltage for the backlight inverter (max. 4.2 A) for 19" / Dual
Channel LVDS displays. The permitted display clock rate is 20 MHz to 66 MHz. The display
is selected automatically based on the code of the display select inputs.
The display power supply voltages 3.3 V and 5 V are switched via the graphic controller
depending on the requirements of the connected display units. 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
1 P5V_D_fused
2 P5V_D_fused
3 RXIN0-
4 RXIN0+
5 P3V3_D_fused
6 P3V3_D_fused
7 RXIN1-
8 RXIN1+
9 GND
10 GND
11 RXIN2-
12 RXIN2+
13 GND
14 GND
15 RXCLKIN-
156
Position Connector Description
Internal X400 Connection of LCD displays with LVDS interface
(channel 1)
Internal X401 Connection of LCD displays with LVDS interface
(channel 2)
Internal X44 Ports for front I/O,
including USB channel 1
Internal X42 Internal USB 2.0 interface
(USB channel 3)
Meaning
+5V (fused) display VCC
+5V (fused) display VCC
LVDS output signal bit 0 (-)
LVDS output signal bit 0 (+)
+3.3V (fused) display VCC
+3.3V (fused) display VCC
LVDS output signal bit 1 (-)
LVDS output signal bit 1 (+)
Ground
Ground
LVDS output signal bit 2 (-)
LVDS output signal bit 2 (+)
Ground
Ground
LVDS clock signal (-)
Input / output
Output
Output
Output
Output
Output
Output
Output
Output
-
-
Output
Output
-
-
Output
SIMATIC Box PC 627B
Operating Instructions, 06/2008, A5E00927393-02