Siemens SIMATIC HMI IPC677C Operating Instructions Manual page 208

Detailed descriptions
16.1 Motherboard
Pin no. Short description
18 P12VF
19 P12VF
20 P12VF
Assignment of the display to the display select pins
One of the 15 available displays is configured automatically via the display select inputs. The
display select inputs are connected to pull–up resistors, i.e. if these inputs are not
interconnected, they are high level. The input must be connected to ground to generate a
low level.
Pin no. LCD_SEL3
0 low
1 low
2 low
3 low
4 low
5 low
6 low
7 low
8 high
9 high
10 high
11 high
12 high
13 high
14 high
15 high
I/O front port for operator panels, X44
This port carries all signals required for connecting operator panels in addition to the display
interface. The maximum cable length is 50 cm at a USB data rate of 12 Mbps.
Pin no. Short description
1 GND
2 P12V
3 BL_ON
4 P5V_fused
5 GND
6 P3V3_fused
208
Meaning
+12 V fused
+12 V fused
+12 V fused
LCD_SEL2 LCD_SEL1
low low
low low
low high
low high
high low
high low
high high
high high
low low
low low
low high
low high
high low
high low
high high
high high
Meaning
Ground
Inverter voltage supply
Backlight on (5 V = On)
+5 V (fused)
Ground
+3.3 V VCC (fused)
LCD_SEL0 Display type
low reserved
high 1280 x 1024 (SXGA), TFT, 2 x 18-bit, LVDS
channel 1 and 2
low DVI LCD 640 x 480
high DVI LCD 800 x 600
low 640 x 480 (VGA), TFT, 18 bits, LVDS channel 1
high reserved
low 1024 x 768 (XGA), TFT, 18 bits, LVDS channel 1
high 800 x 600 (SVGA), TFT, 18 bits, LVDS channel 1
low reserved
high reserved
low reserved
high reserved
low 1024 x 768 (XGA), TFT, 2 x 18-bit, LVDS channel
1 and 2
high DVI LCD 1024 x 768
low DVI LCD 1280 x 1024
high No LVDS display or DVI LCD with automatic
DDC ID
Operating Instructions, 04/2013, A5E02722710-04
Input / Output
Output
Output
Output
Input / Output
-
Output
Output
Output
-
Output
SIMATIC HMI IPC677C