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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 19 Addendum 4: LMV52... with O2 trim control and O2 module 13.08.2004
19.8 O2 module
In comparison with the LMV51... system, the extra components to be connected with
the LMV52… system are the O
2 module and the O2 sensor QGO... and, optionally, the
combustion air and flue gas temperature sensors. The O
2 module is to be connected to
the basic unit via the CAN bus. The O
2 module must be located in the vicinity of the
QGO... (< 10 m), aimed at keeping interference on the sensitive detector lines as low
as possible. For sensor heating, the O
2 module requires a separate mains connection
facility.
19.8.1 Inputs and outputs
Mounting panel
shielding connection
Communication
and power supply
for LMV52...
Mounting panel
shielding connection
Communication
and power supply
Temperature sensor
7550a14e/0903
Temporary connection of
AZL5...
Mains connection
QGO... heating
Temp. comp. QGO...
Power supply temp. comp.
GND
Thermocouple
GND
Nernst voltage
Temperature sensor
1
X84
12VAC1
12VAC2
CANH
CANL
GND
X89-01
1
X83
1
X82
1
X81
1
X85
11
X86
1
1
X87
L
N
U3
G2
M
B2
M
B1
PE
N
LQ4
Q5
PE
12VAC1
12VAC2
CANH
CANL
GND
BUSABSCHLUSS
BUS TERMINATION
Pt/LG-Ni 1000
TEMP. VERBRENNUNGSLUFT/
COMBUSTION AIR
Pt/LG-Ni 1000
TEMP. ABGAS / FLUE GAS
Achtung!
Schutzleiterverbindung zwischen Gehäuse-Oberteil
und Gehäuse-Unterteil herstellen.
Important!
Make protective earth connection between
the two housing sections.
LINE
VOLTAGE
QGO...
QGO...
X89-02
T2.5 IEC 60127-2/I
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