EM8 User's Manual
2.Installation and Wiring
6
Items
Specification
Control
character
Overvoltage prevention
Ensure not over-voltage in Dec process.
Low noise running
Carrier freq. can be adjusted continuously form
1.5KHz to 15.0KHz, which can reduce the motor’s
noise furthest.
Speed tracking restart
It can realize the smoothness restart and
instantaneous stop then restart function.
Freq
setting
signal
Analog input
DC voltage 0~10V,-10V~10V, DC current 0~20mA
(Upper limit and Lower limit can be selected).
Digital setting
By the running panel.
Pulse input
0~50.000kHz (Upper limit and Lower limit can be
selected)
Startup signal
FWD, REV, startup signal can be selected and
self-keep (Three line control).
Timer and Counter
Embedded one timer and one counter , which will
help the system’s integration.
Multi-speed control function /
Wobble frequency
Seven steps programmable multi-speed control at
most, every step’s running direction, running time
can be set respectively. In external terminal control,
It reaches 15 steps, and there are 6 kind of running
modes. Include wobble frequency.
Built-in
PID
control
Common PID
Expediently compose the simple control system
without accessional PID controller.
Special for water
supply
(Need accessories)
Make it possible to construct the constant-pressure
water-supply system of 4 pumps switch at most,
which includes the following functions: pressure
upper or Lower limit alarm, Sleep or wake, Timing
water-supply etc. multi kind running mode.
Running function
Setting the upper and lower limit of frequency,
frequency jump-running, reversal running limit, slip
frequency compensation, auto constant-voltage
running, RS485 communication frequency increment
and decrement control, fault self-restore running,
multi inverter coupled running.
Output
signal
Running status
(OC Output)
During the running of inverter, frequency arrival,
frequency level detection, over-load alarm, and
external fault stop-machine. Frequency upper-limit
arrival, Frequency lower-limit arrival, under-voltage
stop, zero-speed running, programmable multi-speed
running state, Internal counter arrival, Internal timer
arrival, pressure lower-upper limit alarm.
Indicating meter
Output Frequency, output current, output voltage,
motor speed, PID setting and feedback, external
voltmeter, external cymometer.
