Valmet M851040 MEMU memory board
M851040 is a MEMU memory board for the Valmet VPA paper machine dedicated control system. M851040 serves as the program and data storage medium for the VPA system, used to store control programs, paper machine process parameters, formula data, historical collected data, and to cooperate with the SCU main control unit to complete calculations and data reading and writing; Onboard backup lithium battery can save critical process data in case of power failure in the cabinet, preventing parameter loss. This model is a discontinued spare part and is only used for the replacement of old paper VPA control system faults.
Parameter Specifications
| Item | Specifications |
|---|---|
| Product Type | MEMU Memory Board / RAM Memory Module |
| Part Number | M851040, 547006-3A, 547006-3B |
| Applicable System | Valmet VPA Paper Machine Control System |
| Compatible Unit | M851006 SCU control unit |
| Memory Type | RAM + EPROM |
| Backup Battery | 3.6V lithium battery for data retention |
| System Bus | VPA backplane bus |
| Power Supply | 5VDC from rack backplane |
| Max Power Consumption | 4.2W |
| Working Current | Max 210mA |
| Data Retention Time | Up to 5 years with good backup battery |
| Diagnostic Function | Memory self-test, battery low voltage detection |
| Operating Temperature | -10℃ ~ +60℃ |
| Storage Temperature | -30℃ ~ +85℃ |
| Relative Humidity | 5%~95% RH, non-condensing |
| Mounting Mode | Rack slot mounting |
| Protection Class | IP20 |
| EMC Compliance | CE Class B |
| PCB Coating | Conformal coating |
| Net Weight | 310g |
| Dimension | Standard VPA module form factor |
| Origin | Finland |
Valmet M851040 MEMU memory board
Brand Introduction：
Valmet is headquartered in Finland and its automation business was formerly under Metso. In 2013, Metso’s automation business was merged into Valmet and it is a leading supplier of process industrial equipment and automation solutions for the global pulp and paper, energy, biomass, mining, and building materials industries. Its main products include complete production lines, DCS automation systems, field instruments, valves, analytical instruments, and full lifecycle spare parts and maintenance services.
Core automation products:
Valmet DNA Distributed Control System (DCS) is the main process control system of Valmet, including the old IOP series I/O and the new generation ACN series I/O hardware (D201435L CXW controller D201134L AI8C、D201136L DI16C、D201126L DI8P、D201129L DO8P、D201436L DO16C Etc.)
- Hardware: ACN rack, redundant controller module, analog input/output, digital input/output I/O card, bus communication module; Support module hot plugging, channel level fault diagnosis, wide temperature industrial working conditions, support 1:1 controller redundancy, ensuring uninterrupted continuous production.
- Software: Process control software, human-machine interface HMI, historical trends, alarm management, advanced process control APC, equipment status monitoring, asset operation and maintenance management software.
- New generation platform: DNAe , web architecture DCS, strengthened network security, suitable for key process devices such as power plants and ships.
Product features
- The VPA system dedicated MEMU memory board serves as a supporting storage module for the SCU main control unit, storing paper machine control programs, process formulas, and calibration parameters.
- Comes with a 3.6V backup lithium battery, which keeps the process data in RAM from being lost after the system is powered off, avoiding resetting of paper machine parameters.
- Automatic memory self-test upon power on, capable of identifying memory faults and battery undervoltage. The fault status is reported to the SCU unit through the backplane bus.
- Standard VPA backplane bus interface, directly paired with M851006 SCU card for plug and play installation.
- The circuit board is equipped with a three proof protective coating, which is resistant to moisture, dust, and vibration, and is suitable for high temperature, high humidity, and harsh working conditions in paper workshops.
- Slot rack installation, quick plug and play structure, reduces on-site maintenance downtime.
- Hardware read-write verification mechanism to reduce data read-write errors caused by electromagnetic interference in industrial environments.
- Made in Finland, specifically designed for online measurement and local control subsystems of paper machines, the VPA modules of the same series can be flexibly combined.
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