Siemens SIMATIC Rack PC 840 - Assignment of the Front Port on the Motherboard

Hardware Information
7-18
SIMATIC Rack PC 840 Manual
A5E00104826-03
7.5.2 Assignment of the Front Port on the Motherboard
Front Port
The operation panel is connected to this port.
Pin No.
Designation Description Input / Output
1 GND Ground -
2 P12V Output
3 Soft Off Power LED (yellow), anode with
150Ω in series on motherboard
Output
4 P5V_fused +5V (fused) Output
5 GND Ground -
6 PWR button Connection pin for On/Off button at
the front
Input
7 K_CLK Keyboard clock Output
8 K_DATA Keyboard data Input / Output
9 M_CLK Mouse clock Output
10 M_DATA Mouse DATA Input / Output
11 P5V_fused +5V (fused) Output
12 USB_D1M USB data Input / Output
13 USB_D1P USB data Input / Output
14 GND Ground -
15 NC -
16 NC -
17 NC -
18 NC -
19 RESET_N Reset signal (low active) Input
20 SPEAKER Connection for system speaker Output
21 HD_LED HD LED, anode with 150Ω in series
on motherboard
Output
22 DP_LED PROFIBUS/MPI LED, anode above
150Ω in series on motherboard
Output
23 Ethernet_LED Ethernet LED, anode above 330Ω in
series on motherboard
Output
24 TEMP_ERR LED temperature error, anode with
330Ω in series on motherboard
Output
25 RUN_R LED watchDog error, anode with
330Ω in series on motherboard
Output
26 RUN_G LED watchdog o.k., anode with 330Ω
in series on motherboard
Output