Siemens LFS1.11A2

44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
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Mode of operation of the flame safeguards in the case of multiflame supervision with pilot burner and a
PLC, intermittent operating mode (continued)
Attention!
A fail-safe PLC must be used!
Key
F-CPU
Fail-safe CPU (central processing unit) of PLC
F-DI
PLC fail-safe digital input modules
F-RO
PLC fail-safe digital relay output modules
ION
Ionization probe
L / N
Phase conductor / neutral conductor
FR/HR
Flame relay / auxiliary relay
V1/V2
Fuel valve for burner 1 / burner 2
QRA
UV flame detector
PLC
Programmable logic controller
Z1
Ignition transformer for pilot burner
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Building Technologies CC1N7782en 18.04.2018