Siemens SIMATIC Box PC 820 - Internal COM2 Interface, X911; Voltage Supply for CD-ROM Drive, X25; Setting the Power Supply for the Display, X408

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Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
2.8.7 Internal COM2 Interface, X911
Pin no. Signal Description
1 DCD data carrier detect
2 DSR data set ready
3 RxD receive data
4 RTS request zo send
5 TxD transmit data
6 CTS
7 DTR data terminal ready
8 RI ring indicator
9 GND GND
10 +5V +5V supply voltage
2.8.8 Voltage Supply for CD-ROM Drive, X25
Pin no. Description
1 +12V
2 GND
3 GND
4 +5V
2.8.9 Setting the Power Supply for the Display, X408
Plug-in Jumper Description
1–2 5V voltage supply
2–3 3.3V voltage supply
Motherboard
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