Mechanical construction – BECKHOFF BC3100 User Manual
Page 10
Basic information
10
BC3100
Mechanical construction
The Beckhoff bus terminal system is remarkable for its compact
construction and high degree of modularity. When you design the
installation you will need to plan for one bus terminal controller and some
number of bus terminals. The dimensions of the bus terminal controller do
not depend on the fieldbus system. If you use large plugs, for example like
some of the bus plugs used for the Profibus, they may protrude above the
overall height of the cabinet.
Dimensions
of
a
bus
terminal controller
02
02
01
01
+
+
+
+
PE
PE
PE
PE
RUN
BF
DIA
PROFIBUS
B
E
C
K
H
O
F
F
24V
24V
0V
0V
0
9
8
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
BC
31
00
10
0
94
47
12
X1
X10
The overall width of the construction is the width of the BC3100, including
the bus end terminal, plus the width of the installed bus terminals. The bus
terminals are 12 mm or 24 mm wide, depending on their function.
Depending on the gauge of cables used the overall height of 68 mm may
be overstepped by about 5 mm to 10 mm by the cables at the front.
Assembly and connections
It takes only a slight pressure to latch the bus terminal controller and the
various bus terminals onto a supporting 35mm C rail and a locking
mechanism then prevents the individual housings from being removed.
You can remove them without effort if you first release the latching
mechanism by pulling the orange tab. You should carry out work on the
bus terminals and the bus terminal controller only while they are switched
off: if you plug or unplug components while the power is on you may briefly
provoke some undefined state (and, for instance, reset the bus coupler).
You can attach up to 64 bus terminals in series on the right-hand side of
the BC3100. When you assemble the components, make sure that you
mount the housings so that each slot comes together with the
corresponding key. You cannot make any functional connections merely by
pushing the housings together along the supporting track. When they are
correctly mounted there should be no appreciable gap between the
adjacent housings.
The right-hand side of a BC3100 is mechanically similar to a bus terminal.
There are eight connections on the top which can be used to connect to
thick-wire or thin-wire lines. The connection terminals are spring loaded.