Siemens LMV50 Series Manual page 218

Β
Β
218/327
Building Technologies
Note on example 3a/3b!
CAN bus cable with LMV52 and more than 4 actuators and PLL52.
On LMV52 applications with more than 4 actuators (SQM45), a second transformer is
required to power the extra actuators.
In that case, transformer 1 powers the LMV52, the AZL5, and the first 4 actuators.
Note!
Cut the connection between the components at a suitable location. On the actuator
side, the 2 voltages AC1 and AC2 must not be connected but only lines CANH, CANL
and GND (+ shield) to the PLL52 and the other actuator.
The actuators (SA5, SA6) and the PLL52 must be powered by a second transformer to
be located near the actuators and the PLL52.
The supply voltage of this transformer is connected in Example 3a on the actuator 6
(SA6) and in Example 3b on PLL52 (lines AC1, AC2, M) and connected from there via
the bus cable AGG5.641 to the next component.
The fuses for transformer 1 are accommodated in the LMV52.
Optionally, the supply voltage can also be delivered via a conduit box and fed into the
connecting line between SA4 and PLL52.
SA 4
SQM48
Only
CANH
CANL
GND
F T4
230 V
Free
F T2
L
N
Figure 98: Installation in the control panel, the burner and on the boiler; CAN bus cable LMV52 ♠ last
actuator >25 m with 4 actuators and PLL52
Caution!
For transformer 2, the OEM must fit the 3 fuses (F T2 and 2*F T4) close to the
transformer.
Basic Documentation LMV5...
13 Mounting , electrical installation and service
PLL52
Max. cable length
from power supply
of actuators 10 m
F T4
Power transformer 2
AGG5.2
12 V
CC1P7550en
22.05.2018