Siemens LMV50 Series Manual page 216

Example 2
Control cabinet
Max. bus cable length
LMV5...-AZL51...: 5 m
AGG5.631
Power line
max. 3 m AC2 12 V
AC1 12 V
12 V
12 V
0 V
0 V
0 V
230 V
12 V
Power
transformer 1
AGG5.2xx
Β
Β
216/327
Building Technologies
LMV5 in the control panel, actuator on the burner; CAN bus cable LMV5 ↑ last
actuator >20 m
AZL5...
Sub-D
connector
3
RAST3,5
transformer
X52
F3 T4
F2 T4
X10-01
F1 T6.3
LMV5... basic unit
Figure 95: LMV5 in the control panels, actuator on the burner; CAN bus cable LMV5 ↑ las t ac tuator
>20 m
Notes on example 2!
Total length of CAN bus cable '100 m
Whenever the distance between the LMV5 and the last actuator exceeds 20 m, or if
more than 4 SQM45 are used on the burner (see chapter Determination of maximum
CAN cable length AGG5.6), a second transformer is required for powering the
actuators.
In that case, transformer 1 powers the LMV5 and the AZL5 (control panel). Transformer
2 powers the actuators (burner).
Note!
With the CAN bus cable connections from the LMV5 (control panel) to the first actuator
(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 is to be
located near the actuators.
The power from that transformer (lines AC1, AC2, GND) must be fed to the actuator
(ACT4 in the example above) and then connected through via bus cable AGG5.641 to
all the other actuators.
The fuses required for transformer 1 are accommodated in the LMV5.
Caution!
For transformer 2, the 3 fuses (F T2 and 2*F T4) must be located close to the
transformer.
Basic Documentation LMV5...
13 Mounting , electrical installation and service
SA 1 SA 2 SA 3
SQM4... SQM4... SQM4...
3
Only
CANH
Max. bus cable length
CANL
SA4 - SA1: 20 m
GND
AGG5.641
Max. bus cable length
LMV5...- SA1: 75 m
AGG5.641 or
AGG5.631
Burner
SA 4
SQM4...
Max. cable length
from power supply
of actuator 3 m
F T4 F T4
Power
transformer 2
230 V 12 V
AGG5.2xx
Not used
F T2
L
N
CC1P7550en
22.05.2018