ProSoft Technology 3170-PDP - Manual (Page 46)

3170-PDP ♦ FLEX Platform Connect the Adapter to the PROFIBUS DP Network
FLEX I/O™ PROFIBUS Adapter
Page 46 of 152 ProSoft Technology, Inc.
August 23, 2007
Characteristic Bus Segments and Drop Cables
Maximum
Length1
with a Baud
Rate (bits/s) of: <=19.2k 1200 m2 1200 m2 <=15nF
93.75k 1200 m2 1200 m2 <=3nF
187.5k 1000 m2 600 m2 <=1nF
500k 400 m2 200 m2 <=0.6nF
1.5M 200 m2 NA <=0.2nF
12 M 100 m2 NA
NA = Not Applicable
1 If using a combination of both line types, divide the lengths shown by two. 2 This is the sum of all
bus segment and drop cable lengths.
Line A cabling can support baudrates as high as 12 M bits/s.
4.2 Cabling and Equipment Required for Line A Type
4.2.1 Cables
You need a shielded twisted pair cable for your cabling (bus segments or drop
cables). Any line A cable available on the market can be used to connect your
adapter to a PROFIBUS network.
4.2.2 T-junction Connectors
You need t-junction connectors to connect your droplines to bus segments. You
can use any t-junctions available on the market.
4.2.3 Termination Blocks
Termination blocks are only needed if the devices on the end of the network do
not have built-in terminating resistors. If you need termination blocks, you can
use any termination blocks available on the market.
4.2.4 Bus Connector
Connect your adapter to the PROFIBUS DP network by attaching a bus
connector to the female 9 pin D-Sub connector on the front of the module.
Important: For detailed information on the topology and cabling for line A, refer to the
PROFIBUS Standard (DIN 19245 Parts 1 & 3, Issue 1994).
Line B cabling can support baudrates as high as 500k bits/s.