Siemens SIMATIC PC 670 Equipment Manual page 54

Connecting and Switching on the Computing Unit
Connecting the computing unit via an adapter
An adapter is available for connecting the computing unit to the PLC with earlier
standard connecting cables.
Table 3-1 Adapters for connecting the computing unit
Interface
COM 1 as
TTY port
In order to maintain a data transmission rate of 9600 bps up to a distance of 1000 m,
the receive diode is connected to ground (reference) via the connecting cable.
Note
Lengths deviating from the standard connection cable (6ES5 734-2BF00) can be
obtained using Order No. 6ES5 734-2xxx0, whereby xxx stands for the cable
length length code.
3-20
Connection
Computing unit to a SIMATIC S5
programmable controller
Connecting cable
Order No.
6ES5 734-2BF00
6ES5 731-1xxx0 6ES5 731-6AG00
15-pin
6ES5 731-0xxx0 6ES5 731-6AG00
25-pin
Panel PC 670 Computing Unit, Equipment Manual
Release 04/02
Adapter