Technical data

Hardware Information
6-26
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
Internal serail port COM2 (V.24), X26
This port is connected in parallel to the external COM2 port. Both ports can
therefore only be used as alternately. They are assigned such that a 1:1
connection can be established to a 9-pin D-SUB socket when insulation
displacement connectors are used. The maximum cable length is 100 cm at a data
rate of 9.6 kbaud.
Pin No. Signal Meaning
1 DCD Data carrier detect (I)
2 DSR Data set ready (I)
3 RxD Received data (I)
4 RTS Request to send (O)
5 TxD Transmission data (S)
6 CTS Clear to send (I)
7 DTR Data terminal equipment ready
(S)
8 IP Incoming call (I)
9 GND GND
10 P5V +5 V power supply