Siemens LMV5 Series Basic Documentation page 178

Example 1
Max. bus cable length
LMV5...-AZL51...: 80 m
AGG5.630 / 631
Power supply
max. 3 m AC2 12 V
AC1 12 V
12 V
12 V
12 V
230 V
Power trafo 1
AGG5.2xx
Note on example 1
178/278
Siemens Building Technologies
HVAC Products
11.1 Power supply to the LMV5... system
In principle, the CAN bus topology always has a line structure and, therefore, has a
start and an end node.
The individual CAN bus users are connected in series, whereby the respective end nodes
are terminated by CAN bus terminating resistors.
The basic unit is a component of the communication line and is looped in between the
AZL5... and the actuators.
In the system, the AZL5... always assumes the function of a CAN bus end node. The
required CAN bus terminating resistor is already integrated in that case.
With the actuators, the last user becomes the CAN bus end node (here, the internal
CAN bus termination must be activated via a connecting plug).
The other node users within the line structure are configured without terminating
resistor.
Installation of all components in the burner;
CAN bus cable «LMV5... ↔ ACT» < 20 m
Fixed internal
bus termination
AZL5...
Sub-D
connector
RAST3,5
Trafo
M
X52
X51
F3 T4
F2 T4
X10-01
F1 T6,3 CANL CANH
LMV5... basic unit
X3-04
N L
Total length of CAN bus cable ≤ 100 m
Basic Documentation LMV51...
11 Mounting, electrical installation and service
ACT 1
SQM4...
No bus
termination
X50
7550a03e/0903
Jumper
ACT 2 ACT 3
SQM4... SQM4...
No bus No bus
termination termination
Max. bus cable length
LMV5...-SQM4...: 20 m
AGG5.640 / 641
ACT 4
SQM4...
Bus
termination
CC1P7550en
01.10.2003