LNS Alpha ST320 S2 - Page 37

CHAPTER 4: ELECTRICS 4-13
ALPHA ST320 S2
3.2.3. QF2 breaker
Breaker QF2 protects the two phases which power both PLC
and 24V DC power supply. If the 2 phases required power
exceeds 4A, the breaker activates and lever B flips down. The
power supply to PLC and 24V DC power supply is
immediately interrupted.
After the problem is fixed, reset the breaker by flipping lever B
up.
Designation Description
A Power poles input
B ON / OFF lever
C Power poles output
A
C
B