BECKHOFF FB1111-014x - Manual (Page 16)

Component Placement Specification
10 FB1111 Piggyback Controller Board
4 Component Placement Specification
In the following chapters the component placement specification in terms of reference designators and
component values are listed for the three variants of the FB1111 EtherCAT piggyback controller
board.
4.1 Placed/Unplaced Components
As the variants of the FB1111 are all based on one printed circuit board, the different PDI configura-
tions are achieved by alternative component placements. Figure 3 is an example for placed and un-
placed components. Designators for placed components are surrounded by a rectangle. Components
that are not mounted for a specific variant are also referenced by a designator, but without the sur-
rounding rectangle.
R
5
0
0
R
5
0
1
R
5
0
2
R
5
0
3
R
5
0
4
R
5
0
5
Figure 3: Example for placed/unplaced components
Most of the resistor pairs within the PDI configuration area are sharing one pad with each other. When
modifying the resistor configuration care have to be taken in order to connect the corresponding pads
with each other correctly. An example is shown in Figure 4 for single resistors as for an resistor net-
work.
R
N
5
0
1
R
N
5
0
0
R500 R501
R503 R502
R505 R504
Figure 4: Pads of resistor networks and single resistors
4.2 Power Test Pads
Table 8: Power Test Pads
Designator Signal Connected To
TP800 +2.5V Core ET1100
TP604 +3.3V +3.3V
TP605 GND GND