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21
Speed A indicator Speed B indicator
SensorⅡ
Preset
Ctrl Out
SensorⅠ
Photosensor
Speed Ctrl
A1
A2
A3
B1
B2
B3
B4
C1
C2
D1
D2
D3
E1
E2
E3
E4
F1
F2
F3
GND
Speed A
GND
Speed B
Speed
Switch A
Speed
Switch B
The controller has two speed
preset switch control signals,
which control speed switch A
and speed switch B, both of
which are active low.
The status of each control line is
displayed by corresponding indicator
lights on the panel. When a valid signal
is applied to the control line, the
corresponding indicator lights up.
The combination of the on-off states of
the two indicators has 4 states (A is on
and B is off, A is off and B is on, AB is all
on, and AB is all off).
By selecting the control signal, the
controller will enter the corresponding
preset speed. At this time, the output of
the controller can be adjusted by or
The speed will be automatically
recorded. Any time the preset speed
control signal sets the controller into
this state, it will switch to this speed
immediately.
State when both control lines have
valid signals applied.
5.5 Speeds Preset Function
Saturated Remote SpeedA SpeedB Stop
Digital Single Phase Asynchronous
Motor Controller
Voltage V
On Delay s
Soft Start s
Delay s
SDMC20-S
Speed preset function is to directly select the preset speed through external
control signal. By using this function, external control equipment, such as PLC,
computer, sensor and other signal sources can easily form a multi-speed
feeding control system with this controller.
SDMC20-S
SDMC20_SMS-EN_2.01
Digital Single Phase Asynchronous Motor Controller
2023-11