Siemens LMV51 Series Basic Documentation page 194

Example 3
Max. bus cable length
LMV5...-AZL51...: 60 m
AGG5.630 / 631
Power supply
max. 3 m AC2 12 V
M
AC1 12 V
12 V
X10-01
12 V
F1 T6.3
12 V
230 V
Power trafo 1
AGG5.2xx
N L
Notes on example 3
194/301
Siemens Building Technologies
HVAC Products
Installation of all components in the burner;
CAN bus cable «LMV52... ↔ ACT» < 20 m with 4 actuators and O2 module
Fixed internal
bus termination
AZL5...
Sub-D
connector
RAST3.5
Trafo
X52
X51 X50
F3 T4
F2 T4
CANL CANH
LMV52... basic unit
7550a19e/0704
X3-04
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.
Basic Documentation LMV5...
12 Mounting, electrical installation and service
SA 1 SA 2
SQM45... SQM45...
No bus No bus
termination termination
5 5
Max. bus cable length
LMV5x...-SQM4x...: 20 m
AGG5.640 / 641
Jumper
SA 3
SA 4
SQM48... SQM48...
Bus
kein Bus-
termination
abschluss
5 3
Only
CANH
CANL
GND F T4
230 V
F T2
L
PLL52...
Bus
termination
5
Max. cable length
of power supply
to actuators 10 m
F T4
Power trafo 2
AGG5.2xx
12 V
nicht belegt
N
CC1P7550en
13.08.2004