I. Product Description
APTECH: Brand (Aptek, a manufacturer of fluid / industrial control integrated equipment)
DOT 4B 260: Heating constant-temperature stainless steel tank unit model, equipped with temperature control heating jacket and fluid pressure regulating valve group
NSI541-210: Hardware model of the distributed I/O control module for the system
M5900: Main control system series code for the entire machine PLC
FA-04-18: Firmware program version / batch number of factory production
Overall Equipment Composition
The entire equipment is divided into two major parts: constant-temperature fluid pressure tank + M5900 series PLC distributed I/O control system, mainly used for semiconductor high-purity gas supply, chemical micro-reagent supply, and precise fluid ratio control scenarios.
1. Hardware of DOT 4B 260 constant-temperature pressure tank
Structure: cylindrical stainless steel pressure-bearing tank, with a full red silicone rubber heating insulation sleeve on the outside
Top integration: precise pressure regulating valve, pressure gauge, inlet and outlet fluid connection, pressure sensor, liquid level monitoring probe
Temperature control: 24VDC heating circuit, equipped with NSI541-210 module to achieve constant temperature closed-loop control
Medium compatibility: high-purity nitrogen gas, special chemical reagents, low-viscosity oil, precise laboratory / production line fluid transportation
2. Core parameters of NSI541-210 distributed I/O control module
Power supply: standard 24VDC, rated current 10A
I/O channels
Digital input DI: 16 channels (collecting tank pressure, liquid level, temperature, valve position switch signals)
Digital output DO: 16 channels (controlling heating jacket, electromagnetic valve, pressure regulating actuator, alarm indicator light)
Analog channels: 8 channels AI, collecting 4-20mA pressure / temperature transducer signals
Communication protocols: Modbus TCP, EtherNet/IP Ethernet communication, connecting to M5900 main control CPU
Installation method: standard DIN rail cabinet installation
Operating environment: -20℃ ~ +60℃, IP20 cabinet use
Size and weight: 200×100×75mm, the entire machine 1.2kg
3. M5900 main control system and FA-04-18 version
M5900: Special fluid control PLC platform of Aptek, supporting temperature control, pressure closed-loop, flow ratio control, safety interlock logic
FA-04-18: Fixed program version number, including tank over-temperature, over-pressure, low liquid level interlock protection algorithm; different versions of the same model programs cannot be directly swapped, which will cause the temperature control logic to fail
Core Functions
Tank constant-temperature and constant-pressure closed-loop control
NSI541-210 collects temperature and pressure analog signals, uploads to M5900 main control, automatically adjusts heating power and pressure regulating valve output to maintain stable temperature and pressure inside the tank.
Multi-level safety interlock protection
Over-temperature cut off heating, over-pressure automatic pressure relief, low liquid level alarm shutdown, valve failure interlock shut off gas source.
Upper-level data interaction
Ethernet uploads real-time temperature and pressure curves, fault alarm codes to the central control DCS, supports remote parameter modification, fault recording.
Modular expansion
Multiple NSI541-210 can be connected in parallel to the M5900 bus, expanding centralized control of multiple tank groups.
Typical Application Scenarios
High-purity special gas supply cabinet for semiconductor wafer manufacturing
Constant-temperature fluid transportation system for fine chemicals with micro-reagents
Precise fluid ratio control and stable pressure supply system for laboratories
Solvent constant-temperature supply unit for coating processes in lithium battery and photovoltaic production lines
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