Valmet DCS System D201784L Analog Output Module
D201784L is an analog output module in the Valmet DCS system, belonging to the D2000 series I/O card. D201784L is responsible for receiving digital control signals issued by the DCS controller, converting them into standard 4-20mA analog current signals, and outputting them to on-site actuators such as regulating valves, valve positioners, etc., to complete continuous PID adjustment of the process circuit, control valve opening, and adjust process parameters such as pressure, flow rate, and liquid level. Mainly used for spare parts replacement and control point expansion of old D2000 control systems in the papermaking and pulp industries.
Parameter Specifications
| Item | Specifications |
|---|---|
| Product Type | Analog Output Module |
| Part Number | D201784L |
| Applicable System | Valmet D2000 DCS System |
| Channel Quantity | 8 channels analog output |
| Output Signal | 4~20mA |
| Output Resolution | 16-bit |
| Output Accuracy | ±0.1% of full scale |
| Load Resistance | Max 750Ω per channel |
| Power Supply | 24VDC |
| Max Power Consumption | 8W |
| Working Current | Max 330mA |
| Backplane Bus | D2000 internal backplane bus |
| Isolation Type | Galvanic isolation between field and backplane |
| Isolation Voltage | 1500VAC |
| Diagnostic Function | Channel fault, over-range, short circuit detection |
| Operating Temperature | -20℃ ~ +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 for harsh industrial environment |
| Dimension | Standard D2000 module size |
| Origin | Finland |
Valmet DCS System D201784L Analog Output Module
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
- 8 independent analog output channels, standard 4-20mA signal, compatible with on-site actuators such as valve positioners and electric control valves.
- 16 bit high-precision digital to analog conversion, with a full-scale accuracy of ± 0.1%, meeting the precision adjustment requirements of continuous pulp and paper processes.
- Electrical isolation is established between the on-site side and the backboard, with an isolation voltage of 1500VAC, effectively suppressing on-site surges and electromagnetic interference, and protecting the main control unit of the system.
- Built in channel level fault diagnosis can detect output overload and circuit short circuit faults in real time, and upload fault information to the DCS system for alarm, facilitating operation and maintenance troubleshooting.
- The panel is equipped with LED status indicator lights, which respectively display module operation, communication status, channel outputs, and fault alarms.
- Standard rack slot installation, supports hot swapping, shortens system downtime for maintenance in case of failure replacement.
- The circuit board is equipped with a three proof coating, which is resistant to moisture, dust, and vibration, and is suitable for harsh working conditions such as high temperature and high humidity in paper workshops.
- Native compatibility with D2000 system backplane, compatible with the same series of I/O cards for direct use, and easy replacement of spare parts.
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