Siemens LMV5 Series Manual page 10

Technical data (cont'd)
Flame supervision

QRI (suited for
continuous operation)
Connection diagram
IONIZATION (suited for
continuous operation)

10/29
Building Technologies Division
Note:
All measured voltages refer to connection terminal N (X10–02, pin 4).
Supply voltage operation / test at
terminal POWER QRI (X10–02, pin 2)
Minimum signal voltage required at
terminal FSV / QRI (X10–02, pin 6)
For detailed information, refer to Data Sheet N7719.
No-load voltage at terminal ION (X10–
03, pin 1)
Caution!
The ionization probe must be installed such that protection against electrical
shock hazard is ensured!
Short-circuit current
Required detector current
Possible detector current
Permissible length of detector cable
(lay separately)
Note!
The greater the detector cable capacitance (cable length), the lower the voltage at the
ionizations probe and, therefore, the lower the detector current. In the case of
extensive cable lengths and high-resistance flames, it may be necessary to use low-
capacitance cables (e.g. ignition cable). The electronic circuit is designed such that
impacts of the ignition spark on the ionization current will be largely eliminated.
Nevertheless, it must be ensured that the minimum detector current required will
already be reached during the ignition phase. If that is not the case, the connections of
the ignition transformer on the primary side must be changed and / or the location of
the electrodes also.
Approx. DC 14 / 21 V
Min. DC 3,5 V
Display flame approx. 50 %
sw
br
+
0...10 V
Ri 10 M >
Approx. U
Mains
Max. 0,5 mA~
Min. DC 6 µA
Display flame approx. 50 %
(at factory setting of StandardFactor
parameter)
Max. DC 85 µA
Display flame approx. 100 %
(at factory setting of StandardFactor
parameter)
100 m
(wire-earth 100 pF/m)
LMV...
X10-02 / 6 Signal
X10-02 / 4 N
X10-02 / 2 Power supply
and test
)
)
CC1N7550en
22.05.2017