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NJ400 – Hardware System and Technical Features
- Product Description
- Performance Parameters
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NJ400 hardware system
The NA400 hardware system comprises several components: a controller module, an event sequence recording module, a general I/O module, a communication processing module, a backplane, and a system power supply. All of these modules are mounted on the backplane.
Controller module:
This refers to the CPU module, which is installed on the local backplane and comes in two main categories: redundant and non-redundant. The controller features a built-in 10/100 Mbps Ethernet interface and dual serial communication ports. The internal bus is routed via the local backplane, facilitating hot-swappable controllers.
SOE Event Sequence Recording Module:
Provides SOE event sequence recording functionality with a resolution of 1 ms.
General I/O module:
It can be installed on both the local backplane and the expansion backplane, communicating with the controller via a high-speed internal bus.
Communication Processing Module:
It can be installed on both the local backplane and the expansion backplane to add support for additional communication protocols. The NA400 controller can communicate with third-party devices via a variety of network protocols, including RS232/RS485, DeviceNet, Profibus-DP, Ethernet, and CANopen. If the NA400 control system needs to provide a specific communication function, simply install the corresponding communication module onto the backplane. A wide range of communication modules supports most mainstream network communication protocols.
Backplane:
A carrier for installing the controller, power module, I/O module, and communication module, while also supporting local high-speed bus expansion.
Power module:
The power module is mounted on the backplane to supply power to other modules. The power supply for field devices should be configured separately to ensure electrical isolation between the field and the system.
NJ400 Technical Features
Electromagnetic compatibility far superior to other PLCs
The concept of electromagnetic compatibility runs through the entire development process—from principle design and PCB design to system architecture design. Most EMC metrics exceed the level of International Standard Class 3, while electrostatic discharge and fast transient phenomena reach the level of Class 4.
Fieldbus technology
The NJ-PLC employs a fieldbus network that, in addition to features such as fast communication speed, strong anti-interference capability, low cost, simple structure, and excellent real-time performance, also boasts outstanding scalability and easy flexibility in module configuration, greatly enhancing its adaptability to on-site environments and installation requirements.
Network Programming and Debugging
The NA-PLC uses unified programming and debugging software. It provides a 10/100M Ethernet interface for programming and debugging, enabling program downloading and online debugging functions. Via Ethernet, it supports remote programming and debugging, allowing the control center located at a distant site to modify control processes and perform online maintenance on local control devices.
Direct satellite synchronization clock interface
Simply connect the satellite clock signal, which operates at a DC24V level, to the terminal block—no maintenance required. The event timestamps are generated by the event sequence recording module, ensuring even greater time accuracy.
Sequential Control Diagram Programming Technology
The sequential control diagram programming language, designed using “what you see is what you get” technology, is a visual programming language that is ideally suited for complex sequential control processes. Its structure closely mirrors the control flow diagrams designed by engineering firms. Once the control flow has been fully designed, the programming process is considered complete—making it simple and easy to learn. Moreover, programs written in different languages can call each other, enhancing flexibility and convenience in program development and enabling the system to meet the requirements of various complex operating conditions. The system supports sequential control diagram configuration and operation, graphical display, single-step execution, locking, and unlocking. Precompilation of sequential control diagrams ensures that programs are executed correctly.
Powerful serial communication functionality
Serial Communication Module: The number of serial communication modules can be freely configured. Each serial communication module provides up to 4 serial ports, each of which supports the RS485 interface standard and the MODBUS RTU master-slave protocol, and all are programmable.
Product Features
NJ400 Hot Standby Feature Highlights
Automatic hot standby functionality—no configuration required;
The hot standby rate is 100 Mbps, and all data exchange is completed within one scan cycle.
Maximum clock frequency: 266 MHz;
Program download: Simply download once to quickly and efficiently complete program transfer;
The hot standby switchover time is shorter, ranging from 10 to 50 milliseconds.
Simply configure two CPU modules as redundant backups for each other—no hot-standby module is required.
Hot-standby CPU data exchange mechanism
Data is automatically transferred from the primary CPU to the backup CPU.
Data exchange is performed at the start of each scan cycle;
Data transmission is synchronized with the PLC program, significantly reducing the transmission time.
Multiple mechanisms enhance reliability.
Automatic switchover between the primary and backup stations, requiring no manual intervention;
All modules support hot-swapping;
All modules can be replaced without stopping or de-energizing the system;
System switching can be accomplished via a dedicated instruction (SWITCH), and the switching conditions are controllable.
A large number of registers provide information such as redundant system status, facilitating fault diagnosis.
Fault-tolerant mechanism: If a single substation fails, the overall bus and control station will not undergo a complete switchover.
*The information provided in this text is merely a general description and introduction to the product’s features. The content of this document may change as the product undergoes further development. The right of interpretation rests with Nanjing Aotuo Technology Co., Ltd.
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System power 5VDC Supply voltage
Ripple
Polarity Reverse Connection Protection5VDC (±5%)
<5%
SupportElectromagnetic compatibility Immunity Surge immunity
Oscillation and Immunity to Disturbances
Fast transient
Electrostatic discharge
Electromagnetic field anti-interferenceIEC61000-4-5 4 kV (common-mode) / 2 kV (differential-mode)
IEC61000-4-12 2.5 kV (common-mode) / 1 kV (differential-mode)
IEC61000-4-4 +4kV (power supply) / +2kV (1/0)
IEC61000-4-2 ±15kV (air) / ±8kV (contact)
IEC61000-4-3 10 V/m, frequency 80 MHz to 1 GHzElectromagnetic radiation Radiation interference IEC61131-2
30~230 MHz, 10 m quasi-peak less than 40 dB(μV/m)
230~1000 MHz, 10 m quasi-peak less than 47 dB(μV/m)Conducted interference IEC61131-2
Quasi-peak value at 0.15–0.5 MHz is less than 79 dB(μV); average value is less than 66 dB(μV).
Quasi-peak value between 0.5 and 30 MHz is less than 73 dB(μV); average value is less than 60 dB(μV).Environmental adaptability Climate and environment Operating temperature
Operating humidity
Working altitude
Storage temperature
Storage humidity-25 ℃ to +70 ℃
5%–95%, no condensation
5000m
-40℃ to +60℃
5%–95%, no condensationMechanical environment Vibration
Impact
Tumbling and overturning
Free fallIEC 60068-2-6: Part 2-6/10 up to 58 Hz, constant amplitude 0.075 mm, 1G (gravitational acceleration), amplitude 0.3 mm, frequency 58–150 Hz.
IEC 60068-2-27:15G, duration 11 ms
IEC 60068-2-31: 50 mm, dropped 4 times (unpacked)
IEC 60068-2-32: 1 m, dropped 5 times (transport packaging)Enclosure protection Enclosure protection rating IEC60529 IP20 (Protects against the ingress of foreign objects larger than 12 mm; not waterproof) *The information provided in this text is merely a general description and introduction to the product’s features. The content of this document is subject to change as the product undergoes further development. The right of interpretation rests with Aoto Technology Co., Ltd.
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Service hotline:+8618905163737
Company Headquarters: No. 15, Building B, Zone B, Phase I, Headquarters Economic Park, 69 Fengzhan Road, Yuhuatai District, Nanjing, Jiangsu, P.R. China
Production Center: No. 219 Qinghuiting West Road, Jiangning Economic Development Zone, Nanjing City, Jiangsu Province
Aoto Technology Co., Ltd.
