Structure And Wiring Of Single-End Triac Output Circuit - FATEK FBS Series Manual

B.
Transistor Single-End SRCE Output
FB -PLC
S
1A
FUSE
2PTs Common Output Block
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
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

FB -PLC
S
AC AC
power
電源
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.
Y 2
C 2 Y 3
共點輸出區塊
1A
FUSE
Y4
C4
2A
FUSE
DC
DC
power
電源
4PTs Common Output Block 共點輸出區塊
AC
AC
power
電源
2A
FUSE
H 7 - 5
Y7
Y5
-PLC are
S