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Example 2
Control panel
Max. bus cable length
LMV5...-AZL51...: 5 m
AGG5.630 / 631
Power supply
max. 3 m
AC2 12 V
AC1 12 V
12 V
12 V
12 V
230 V
Power trafo 1
AGG5.2...
Notes on example 2
Building Technologies
HVAC Products
LMV5... basic unit in the control panel, actuator on the burner;
CAN bus cable «LMV5... → SA» > 20 m
Fixed internal
bus termination
AZL5...
Sub-D
connector
3
5
RAST3.5
Trafo
M
X52
X51
F3 T4
F2 T4
X10-01
CANL
CANH
F1 T6.3
LMV5... basic unit
X3-04
N
L
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 one SQM48 is used on the burner (refer to sizing chart "Determination of
maximum cable length"), a second transformer is required for powering the actuators.
In that case, transformer 1 powers the LMV5... basic unit and the AZL5... display and
operating unit (Fig. 1). Transformer 2 powers the actuators (Fig. 2).
With the CAN bus cable connections from the LMV5... (Fig. 1) to the first actuator (Fig.
2), the 2 voltages AC1 and AC2 on the LMV5... side must not be connected and only
cables CANH, CANL and M (+shielding) are to be connected to the first actuator (Fig.
2).
In that case, the actuators must be powered by a second transformer which to be lo-
cated near the actuators.
The power from that transformer (lines AC1, AC2, M) must be fed to the actuator
(ACT4 in the example above) and then connected through via bus cable AGG5.640
(cable type 1) to all the other actuators.
The fuses required for transformer 1 are accommodated in the LMV5... basic unit.
For transformer 2, these 3 fuses must be located close to the transformer (for type, re-
fer to Basic Documentation P7550).
Installation Guide LMV5...
ACT 1
ACT 2
SQM4...
SQM4...
No bus
No bus
termination
termination
3
5
Only
CANH
CANL
GND
Max. bus cable length
LMV5...- ACT1: 75 m
AGG5.640 / 641 or
AGG5.630 / 631
X50
7550a04e/0304
Jumper
ACT 3
ACT 4
SQM4...
SQM4...
Bus
No bus
termination
termination
5
5
F T4
F T4
Max. bus cable length
ACT4 - ACT1: 20 m
AGG5.640 / 641
230 V
12 V
Not used
F T2
L
N
Burner
Max. cable length
of power supply
for actuators 3 m
Power trafo 2
AGG5.2...
39/45
CC1J7550.1en
16.10.2006
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