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Building Technologies Division
8
Connection diagram
B1 M
B2
B1 M
B2 M
Figure 9: Connection diagram
B1
(+) Signal of oxygen measuring cell
B2
(+) Thermocouple voltage
G2
(-)
Supply temperature compensation element
GND
Electrical ground for shielding
M
(-)
Electrical ground for signals B1 and B2
M
(-)
Q4
Sensor heating with mains connection
Q5
Sensor heating with mains connection
U3
(+) Signal of temperature compensation element
Protective earth (PE)
Oxygen Sensor QGO21...
8 Connection diagram
M
G2
U3
G2 U3
GND
QGO21...
Q4
Q5
Q4
Q5
PE
PLL52...
CC1P7845en
06.12.2017
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