Rockwell Automation MD65 Profibus Communication Card - Manual (Page 23)

Installing the PROFIBUS Module 3-7
To meet the requirements of EN55011 Class A or B, the conditions
listed below must be satisfied.
Note: For the conditions to satisfy the essential
requirements for CE compliance on MD65 drives. please
refer to the MD65 manual, D2-3519.
In applications where first environment, unrestricted
distribution is requested (EN55011 group 1, class B), the
installation requires a shielded enclosure.
3.4 Terminating the Network
The first and last node on the PROFIBUS network needs to be
terminated by using a PROFIBUS connector with terminating
resistors. See figure 3.5.
Some connector manufacturers offer standard terminating
connectors, such as the yellow ERNI PROFIBUS termination
vertical connector (Part # 103659). Standard PROFIBUS node
connectors, such as the Phoenix Subcon Plus M1 (Part #2761826),
can be configured as a terminating connector by adding resistors.
Switching
Frequency of MD65
EN55011
Class A EN55011 Class B
4 kHz Use one ferrite Ferrishield (part No.
HI28B2039) or Fair-Rite (part No.
0443164151)
6 kHz No ferrite
required
8 kHz
16 kHz Use three clip ferrites TDK, type
ZCAT 3035-1330
Figure 3.5 – Connection for Terminating Resistors
3 R x D / T x D - P
V c c 6
3 9 0 2 2 0 3 9 0 O h m
A
B
R x D / T x D - P 3
R x D / T x D - N 8
G N D 5
8 R x D / T x D - N