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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 12 Mounting, electrical installation and service 13.08.2004
Installation of all components in the burner;
CAN bus cable «LMV52...
↔ ACT» < 20 m with 4 actuators and O2 module
X50
RAST3.5
Trafo
X52
Power trafo 1
AGG5.2xx
12 V
AC1 12 V
LMV52... basic unit
CANH
F1 T6.3
X10-01
F3 T4
X51
Max. bus cable length
LMV5...-AZL51...: 60 m
AGG5.630 / 631
Sub-D
connector
AZL5...
AC1 12 V
AC2 12 V
CANL
CANH
GND
Shielding
12 V
230 V
12 V
Power supply
max. 3 m AC2 12 V
M
CANL
X3-04
N L
7550a19e/0704
Fixed internal
bus termination
Max. bus cable length
LMV5x...-SQM4x...: 20 m
AGG5.640 / 641
SA 3
SQM48...
SA 2
SQM45...
SA 1
SQM45...
No bus
termination
AC1 12 V
AC2 12 V
CANL
CANH
GND
Shielding
F2 T4
No bus
termination
kein Bus-
abschluss
Jumper
Only
CANH
CANL
GND
Max. cable length
of power supply
to actuators 10 m
F T4
AC1 12 V
SA 4
SQM48...
230 V 12 V
F T2
N
F T4
AC2 12 V
3
nicht belegt
M
L
Power trafo 2
AGG5.2xx
Bus
termination
5 5
5
PLL52...
Bus
termination
5
CAN bus cable with LMV52... and more than 4 actuators and O2 module PLL52...
On LMV52... applications using more than 4 actuators (SQM45...), a second trans-
former 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 mod-
ule, 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 ex-
ample 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 trans-
former.
Example 3
Notes on example 3
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