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Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
3 Product description
83054802 1/2018-07 La
35-228
3.3.25 O2 sensor
2
3
X81
4
5
6
1
QG
O...
B1
M
B2
M
G2
U3
B1
M
B2
M
G2
U3
Q4
Q5
QGO...
GND
2
3
X8
9-2
1
QG
O...
PE
N
L
Q5
Q4
The O
2
sensor is connected to the O
2
module (accessory).
Connect the signal cable (3 x 2 x 0.25 mm
2
), twisted in pairs, to X81. Connect the
screen to one side of the creen clamp of the O
2
module, cable length maximum
10 m.
Connect separate cable (3 x 0.75 mm
2
) for the sensor heating to
output X89-2:Q4/Q5.
The O
2
sensor has to be configured in parameter
O2 Sensor
Terminal
Function
B1 / M
Nernst voltage depending on the current O
B2 / M
Thermo element of the O
2
sensor (0 … 33 mV), 700 °C equal to
approx. 29.1 mV.
Current operating temperature [ch. 6.10.20].
G2
Voltage supply for temperature compensation
U3
Signal of temperature compensation
L (Q4)
N (Q5)
Pulsed voltage supply for sensor heating 230 V, N (Q5) is
switched. Parameter
QGO HeatingLoad
shows the current
heating capacity [ch. 6.10.21].