Siemens SIMATIC NET PROFIBUS - Manual (Page 149)

Passive Components for RS-485 Networks
4-51
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Additional PG Interface
The RS-485 bus terminal with additional PG interface (see Figure 4-28) has an
additional 9-pin sub-D female connector on the front panel for connecting, for
example a programming device using a PG connecting cable. The pinout is
identical to that shown in Table 4-10.
Figure 4-28 RS-485 Bus Terminal with Additional PG Interface
Note
The SIMATIC NET PROFIBUS RS-485 bus terminals are only suitable for
transmission rates
≤
1.5 Mbps. For higher transmission rates, use the 12M bus
terminal.