Siemens LMV5 Series Basic Documentation page 180

Example 3
Fixed internal
bus termination
Max. bus cable length
LMV5...-AZL51...: 60 m
AGG5.630 / 631
Power supply line
RAST3,5
AC2 12 V
max. 3 m
Trafo
M
X52
AC1 12 V
F3 T4
F2 T4
12 V
X10-01
12 V
F1 T6,3
12 V
230 V
Power trafo 1
AGG5.2xx X3-04
N L
Notes on example 3
180/278
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HVAC Products
Installation of all components in the burner;
CAN bus cable «LMV52... ↔ ACT» < 20 m with 6 actuators and O2 module
AZL5...
Sub-D
5
connector
X51 X50
CANL CANH
LMV52... basic unit
7550a16/0903
CAN bus cable with LMV52... and more than 4 actuators and O2 module PLL52...
On LMV52... applications using more than 4 actuators, a second transformer is
required for powering the extra actuators.
In that case, transformer 1 powers the LMV52... basic unit, the AZL5..., and the first 4
actuators.
With the CAN bus cable connection from the fourth actuator to the O2 module, the 2
voltages AC1 and AC2 will not be connected on the «actuator 4» side, but only lines
«CANH, CANL and M» (+shielding) will be connected to the O2 module.
In that case, the actuators (SA5 and SA6) and the O2 module are to be powered by a
second transformer which must physically be located near the actuators and the O2
module.
The supply line from that transformer will be connected to the actuator (SA6 in the
example above) (lines AC1, AC2, and M), to be run from there via the AGG5.640 (cable
type 1) to all the other actuators (SA5) and the O2 module.
The fuses required for transformer 1 are accommodated in the LMV52... basic unit.
For transformer 2, the OEM must fit the 3 fuses in the vicinity of the transformer.
Basic Documentation LMV51...
11 Mounting, electrical installation and service
ACT 1 ACT 2 ACT 3
SQM4... SQM4... SQM4...
No bus No bus No bus
termination
termination termination
5
5
Max. bus cable length
LMV5x...-SQM4x...: 20 m
AGG5.640 / 641
ACT 4
ACT 5
SQM4...
PLL52... SQM4...
Bus
No bus No bus
termination
termination termination
3 5
5
nur
CANH
CANL
GND
Jumper
ACT 6
SQM4...
Bus
termination
Max. cable length
5
of power supply
for actuators 3 m
F T4 F T4
Power trafo 2
AGG5.2xx
230 V 12 V
Not used
F T2
L
N
CC1P7550en
01.10.2003