Download Siemens SIMATIC PANEL PC 877 Operating instructions

Detailed descriptions
16.1 Motherboard
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
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
Reserved
Reserved
-
8
Reserved
Reserved
-
9
Reserved
Reserved
-
10
Reserved
Reserved
-
11
P5V_fused
+5 V (fused)
Output
12
USB_D1M
USB data channel 10
Input / Output
13
USB_D1P
USB data+, channel 10
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
reserved
Reserved
-
21
HD_LED
HD LED, anode with 1 kOhm in series on the
motherboard
Output
22
DP_LED
MPI/DP LED, anode via 1 kOhm in series on the
motherboard
Output
23
Ethernet_LED
Ethernet LED, anode with 1 kOhm in series on the
motherboard
Output
24
TEMP_ERR
Temperature error LED, anode with 1 kOhm in series
on the motherboard
Output
25
RUN_R
Watchdog error LED, anode with 1 kOhm in series on
the motherboard
Output
26
RUN_G
Watchdog OK LED, anode with 1 kOhm in series on
the motherboard
Output
180
SIMATIC IPC677C
Operating Instructions, 05/2010, A5E02722710-01