H7-5
B.
Transistor Single-End SRCE Output
C
2
Y
2
Y
3
C4
Y4
Y5
Y7
共點輸出區塊
共點輸出區塊
FBS-PLC
2A
FUSE
1A
FUSE
DC
電源
The figure above uses output block s of 2PTs common and 4PTs common as an example to explain the differences in
structural and wiring for SINK and SRCE output circuits, respectively.(8PTs common has the same block structure and
wiring, except with different point number) The single-end SINK output and SRCE transistor output in FB
S-PLC are
different models. The user must check whether it is SINK output model or SRCE output model when purchasing.
7.3.3 Structure and Wiring of Single-End TRIAC Output Circuit
AC
電源
AC
電源
z
TRIAC output can only be used for AC load. Furthermore, a load current larger than the holding current (25mA) is
required to keep TRIAC conducting. Therefore, when the load current is less than 25mA, a Dummy load must be
connected parallel with load to make the load current larger than the TRIAC holding current. Besides, note that even
when TRIAC output is open (OFF), there still exists a leakage current of 1mA (AC100V) or 2mA (AC200V), which
may trigger actions in loads that can be activated by small currents. Connection of Dummy load in parallel with the
load described above can solve this problem.
FBS-PLC
2PTs Common Output Block 4PTs Common Output Block
DC
power
2A
FUSE
1A
FUSE
AC
power
AC
power
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