Power Supply To The Lmv5 - Siemens LMV50 Series Manual

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13.1 Power supply to the LMV5

The LMV5 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 AZL5 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 actuator (or in the case of longer distances).
The second power transformer is operated as shown in example 2.
In principle, the bus topology 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 LMV5 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
required 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 activated via a connecting plug).
The other node users within the line structure are to be configured without using a
terminating resistor.
Basic Documentation LMV5...
13 Mounting , electrical installation and service
CC1P7550en
22.05.2018