1.High torque operation based on advanced speed sensor free vector control technology
SJ300 series adopts the advanced Hitachi peed sensor free vector control technology to control the efficient high torque operation.
■The starting torque is over 200% at 0.5Hz.

■The rotary speed fluctuation is greatly reduced to improve the stability and precision.
■The torque is as high as 150% at approximately 0Hz.
The secondary driving motor of SJ300 has 150% high torque at approximately 0Hz., which can be utilized with the ON/OFF actions of brake to achieve better performance.
■High Torque Multi-Motor Operation
SJ300 can efficiently control two motors simultaneously, while traditional speed sensor free vector control technology is effective to one motor.
(Notice: The model and capacity of the two motors should be the same.)
■Online/Offline Automatic Motor Parameter Setting
The automatic setting of vector control parameters can be done online or offline conveniently.
Automatic online adjustment

2.Input/Output Function
■Input/Output Function
·Intelligent input/output terminals, allowing leakance/source logic selection;
·Except for the FM terminal, SJ300P adopts analogue current and voltage AM and AMI terminals as the standard configuration. The ‘secondary frequency converter’ can directly receive the analogue output from the ‘primary frequency converter’ as its frequency instruction to realize follow-up control.
·The auxiliary speed input can be generated from attached analogue signals, and the attached analogue signals can be input as auxiliary speed.
■Operational Parameter Setting of the Third Motor
SJ300 can set the operational parameters of 3 electric motors, which is applicable to the control of multi-motor system with conversion method.
■ON/OFF of Fan
The cooling fan works when the frequency converter works, and it stops once the converter stops. The design prolongs the life of the cooling fan, and eliminates the fan noise when the frequency converter has no load.
■PID Operation
PID operation can simplify the system, and save the cost of unnecessary PI controllers. The design is very helpful in some applications, for instance, the constant voltage control.
■Frequency Conversion Rate Display
The rate of frequency conversion can be displayed with the conversion factor.
■3-Wire Function
‘ Self-lock’ of starting signal, no external equipment is needed.

3.Convenient Maintenance
■Dismountable Cooling Fan and DC Bus Capacitor
The cooling fan and DC bus capacitor can be easily dismounted on site.
■Dismountable Control Circuit Terminal Blocks
The control wires needn’t to be reconnected when SJ300P is replaced.

4.Peripheral Support
■EMI (Electromagnetic Interference) Filter
The EMI filter is in compliance with EMC (EN61800-3) and low-voltage standard (EN50178).
■Reduction of Noise from Control Power Source
The noise terminal voltage of control current is improved to 20 dB(μV) to reduce the noise of sensors and other peripheral facilities.

5.Convenient Operation
■Digital Control
Standard digital operator (OPE-S) realizes the remote control. The 4-digit LED display facilitates the observation
■6 Languages Displayable
SRW-OEX that displays in six languages including English, French, German, Italian, Spanish and Portuguese or OPE-S with potentiometer is provided as options.
■Instruction Function (Shortcut Menu)
The users can select instructions that are frequently used, and designate them to corresponding shortcut keys.
■Built-in RS485
The system has the built-in RS485 as the standard configuration of ASCII serial communication ports.
■Programming Software
The system can be applied in Windows environment in PC

6.Protection Under Various Installation Environments
The protection standard of SJ300 is IP20 (NEMA 1).
The standard can be improved to IP54 (NEMA 12) if additional peripheral facilities are attached.

7.Universal Performance Worldwide
■In Compliance with Universal International Standards
CE, UL, Cul and C-Tick certified
■Compatible with Industrial Bus
SJ300P can communicate with LONWORKS^TM, PROFIBUS, DeviceNet^TM, ModbusRTU^TM and Ethernet^TM via communication options (to be provided soon).