Siemens LMV5 Series - Power Supply for LMV5... System (contd); Example 2: Control Panel and Burner Setup

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Building Technologies Division CC1N7550en
Industry Sector 24.05.2011
Power supply for LMV5... system (cont´d)
Basic unit LMV5... in the control panel, actuator on the burner;
CAN bus cable «LMV5... ↔ last actuator» >20 m
Max. bus cable length
SA4 - SA1: 20 m
AGG5.641
Max. bus cable length
LMV5...- SA1: 75 m
AGG5.641 or
AGG5.631
Only
CANH
CANL
GND
Max. cable length
from power supply
of actuator 3 m
F T4
AC1 12 V
X50
RAST3,5
transformer
X52
Power
transformer 1
AGG5.2xx
12 V
AC1 12 V
LMV5... basic unit
F1 T6.3
X10-01
F3 T4
X51
Max. bus cable length
LMV5...-AZL51...: 5 m
AGG5.631
Control cabinet
CANL CANH GND
12 V
230 V
12 V
SA 4
SQM4...
SA 3
SQM4...
SA 2
SQM4...
SA 1
SQM4...
230 V 12 V
F T2
N
F T4
AC2 12 V
Power line
max. 3 m
AC2 12 V
3
Not used
M
L
AC1 12 V AC2 12 V CANL CANH GND Shielding
Sub-D
connector
AZL5...
F2 T4
Power
transformer 2
AGG5.2xx
Burner
3
&
Note on example 2!
Total CAN bus cable length ≤100 m
If the distance between the LMV5... and the last actuator exceeds 20 m, or if more than
4 SQM45… are fitted to the burner (refer to «Determination of the maximum cable
length»), a second transformer is required for powering the actuators. In that case,
transformer 1 powers the LMV5... basic unit and the AZL5... display and operating unit
(control panel). Transformer 2 powers the actuators (burner).
&
Note!
With the CAN bus cable connections from the LMV5... (control panel) to the first actua-
tor (burner), the 2 voltages AC1 and AC2 on the LMV5... side must not be connected
and only cables CANH, CANL and GND (+shielding) are to be connected to the first
actuator (burner).
In that case, the actuators must be powered by a second transformer which to be lo-
cated near the actuators.
The power from that transformer (lines AC1, AC2, M) must be fed to the actuator
(ACT4 in the example above) and then connected through via bus cable AGG5.641
(cable type 1) to all the other actuators. The fuses required for transformer 1 are ac-
commodated in the LMV5... basic unit.
&
Note!
For transformer 2, the 3 fuses must be located close to the transformer (for type, refer to
Basic Documentation P7550).
For additional examples, refer to Basic Documentation P7550!
Example 2