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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 O
2
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
M
oun
tin
g
pa
ne
l
sh
ie
ld
in
g c
o
nn
ec
tio
n
C
ommu
ni
ca
tio
n
a
nd po
w
e
r
su
pp
ly
fo
r L
M
V
52
...
M
oun
ting
p
an
e
l
sh
ie
ld
in
g c
on
ne
ct
io
n
C
ommu
ni
ca
tio
n
a
nd po
w
e
r
su
pp
ly
T
em
pe
ra
tur
e sen
sor
75
50a
14e/
09
03
Temporary connection of
AZL5...
Mai
n
s co
nne
ct
io
n
QGO.
.. h
eat
in
g
Te
m
p.
c
o
m
p. QGO
...
Po
we
r s
u
pp
ly
t
e
mp.
c
o
mp.
GN
D
Th
er
m
oc
o
uple
GND
Ne
rn
st
v
ol
ta
ge
T
em
pe
ra
tur
e sen
sor
1
X 84
12V
A
C
1
12V
A
C
2
CA
N
H
CA
N
L
GN
D
X 89-01
1
X 83
1
X 82
1
X 81
1
X 85
1
1
X 86
1
1
X 87
L
N
U3
G2
M
B2
M
B1
PE
N
L
Q4
Q5
PE
12
V
A
C
1
12V
A
C
2
CAN
H
CAN
L
GN
D
BUS
AB
S
C
HL
US
S
BUS
T
E
RM
IN
A
T
IO
N
P
t/
L
G
-N
i 100
0
T
E
M
P
. V
E
RBR
E
N
NUNG
S
L
U
F
T
/
C
O
M
B
U
S
T
IO
N
A
IR
P
t/
L
G
-N
i 100
0
TE
M
P
. A
B
G
A
S
/
FL
U
E
G
A
S
Achtung!
Schutzleiterverbindung zwischen Gehäuse-Oberteil
und Gehäuse-Unterteil herstellen.
Important!
Make protective earth connection between
the two housing sections.
LI
N
E
VO
L
T
A
G
E
QG
O.
..
QG
O
...
X 89-02
T2.5 IEC 60127-2/I