Operating instructions

Detailed descriptions
17.1 Motherboard
SIMATIC Panel PC 677B
Operating Instructions, 05/2007, A5E01035609-01
191
Serial port COM 1, X616
The COM1 serial port has the following pin assignment:
Serial interface COM1
Pinno. Short description Meaning Input / output
1 DCD (M5) Receive signal (carrier) Input
2 RxD (D2) Receive data Input
3 TxD (D1) Transmit data Output
4 DTR (S1) Data terminal ready Output
5 GND (E2) Functional ground (reference potential) –
6 DSR (M1) Ready for operation Input
7 RTS (S2) Request to send Output
8 CTS (M2) Clear to send Input
9 RI (M3) Incoming call Input
17.1.5 Front ports
Overview
Port Position Connecto
r
Description
Display (LVDS) Internal X400 Connection of LCD displays with LVDS interface
(channel 1)
Display (LVDS) Internal X401 Connection of LCD displays with LVDS interface
(channel 2)
I/O front Internal X44 Ports for front I/O,
including USB channel 1
USB Internal X42 Internal USB 2.0 interface
(USB channel 3)