Siemens LMV5 Series Manual page 16

Power supply for the LMV5... system
General
Example 1
Max. Bus cable length
LMV5...-AZL51...: 80 m
AGG5.631
AC2 12 V
AC1 12 V
12 V
12 V
12 V
230 V
Power transformer 1
AGG5.2xx
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The LMV5... system is powered via external transformer AGG5.2.... This transformer
supplies power to certain electronics sections via terminal X10 – 01 and to internal
modules, actuators and display and operating units via terminal X52. Run the power
lines to the bus users together with the communication lines in a common cable. Since
the transformer's power line is restricted, a second power transformer is required if the
system uses more than 4 SQM45... actuators (or in the case of longer distances). The
second power transformer is operated as shown in example 2. In principle, the bus to-
pology must always have a line structure and, therefore, must have a start and an end
node. The individual bus users must be connected in series, whereby the respective end
nodes are to be terminated by bus terminating resistors. The basic unit is a component
of the communication line and to be looped in between the AZL5... and the actuators.
Within the system, the AZL5... always assumes the function of a bus end node. The re-
quired bus terminating resistor is already integrated in that case. With the actuators, the
last user becomes the bus end node (here, the internal bus termination must be acti-
vated via a connecting plug). The other node users within the line structure are to be
configured without using a terminating resistor.
Installation of all components in the burner;
CAN bus cable ↔LMV5... →shielding last actuator ≈ 20 m
Fixed internal
bus connection
AZL5...
Sub-D
connector
RAST3,5
transformer
X52
F3 T4
F2 T4
F1 T6,3
LMV5... Basic unit
X3-04
Note on example 1!
Total length of CAN bus cable ≤100 m
SA 1 SA 2
SQM4... SQM4...
Max. Bus cable length
LMV5...-SQM4...: 20 m
AGG5.641
SA 3
SA 4
SQM4... SQM4...
CC1N7550en
24.05.2011