Siemens SIMATIC NET PROFIBUS, Owner'S Manual

Page: 71 / 490

Configuring Networks
3-5
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Value Factors
To be able to define permitted configurations, a method is necessary with which
the attached components can be evaluated in terms of their capacitive bus load.
This is achieved by assigning value factors to the components
(see Table 3-4 ).
PROFIBUS interfaces implemented as 9-pin sub-D female connectors (CPs,
OLMs...), do not have their own value factors. These are already taken into
account in the values listed in the table.
Table 3-4 Values for Segments at 1.5 Mbps
Product Name Value (V)
Bus terminal with 1.5 m long tap line
(Order no. 6GK1 500-0AA00, Version 2) 1.5
Bus terminal with 1.5 m long tap line, with PG interface
(Order no. 6GK1 500-0DA00, Version 2) 1.5
Bus terminal with 3.0 m long tap line
(Order no. 6GK1 500-0BA00, Version 2) 2.5
Bus connector with 30
°
cable outlet
(Order no. 6ES7 972-0BA30-0XA0)
0.7
Bus connector with axial cable outlet
(Order no.: 6GK1 500-0EA02)
Bus connector with axial cable outlet for FastConnect system
(Order no.: 6GK1 500-0FC00)
Bus connector with 90
°
cable outlet
(Order no.: 6ES7 972-0BA11-0XA0)
Bus connector with 90
°
cable outlet with PG interface
(Order no.: 6ES7 972-0BB11-0XA0)
Bus connector with 90
°
cable outlet for FastConnect system
(Order no.: 6ES7
972-0BA50-0XA0)
Bus connector with 90
°
cable outlet with PG interface
(Order no.: 6ES7 972-0BB50-0XA0)
Bus connector with 35
°
cable outlet
(Order no.: 6ES7 972-0BA40-0XA0
)
Bus connector with 35
°
cable outlet with PG interface
(Order no.: 6ES7 972-0BB40-0XA0
)
0.1
Bus terminal BT12M (Order no. 6GK1500-0AA10) 0.1
RS-485 repeater (attachment of bus segments) (Order no. 6ES7 972-0AA01-0XA0) 0.1
PROFIBUS terminator (active RS-485 attachment element)
(Order no. 6ES7 972-0DA01-0AA0) 0.1
SIMATIC S5/S7 connecting cable for 12 Mbps PG attachment to PROFIBUS-DP (Order
no.: 6ES7 901-4BD00-0XA0) 0.5