Neles Automation A413135 AOU4 – 4-Channel Analog Output Module | Metso DCS Platform
Engineering Background: The A413135 AOU4 is a dedicated analog output module engineered by Neles Automation (now part of Metso Outotec) for integration within distributed control system (DCS) architectures. Designed to meet the rigorous demands of continuous process industries, this module delivers precision 4–20 mA analog output signals to field actuators, control valves, and variable-speed drives.
Product Positioning: The AOU4 serves as a critical I/O interface layer in Neles/Metso DCS installations, providing stable, isolated analog output channels for closed-loop process control in oil & gas, pulp & paper, power generation, and chemical processing plants. Konmask.com supplies this module as a verified OEM replacement and spare part for ongoing plant maintenance and system expansion projects.
Complete Technical Specifications
- Part Number: A413135 AOU4
- Manufacturer: Neles Automation (Metso Outotec)
- Module Type: Analog Output Unit (AOU)
- Output Channels: 4 channels
- Output Signal: 4–20 mA current loop (standard)
- Resolution: 12-bit D/A conversion (typical for platform)
- Channel Isolation: Galvanically isolated outputs
- Power Supply: Supplied via DCS backplane bus
- Operating Temperature: 0°C to +60°C
- Storage Temperature: –40°C to +85°C
- Humidity: 5–95% RH, non-condensing
- Mounting: DCS rack/backplane card insertion
- Weight: Approx. 1,560 g (module + housing)
- Compliance: CE marked; designed to IEC 61131-2 analog I/O standards
- Country of Origin: Finland
Proven Application Environments
- Oil & Gas: Wellhead control panels, separator control, pipeline pressure regulation
- Pulp & Paper: Digester temperature control, stock flow regulation, bleaching process loops
- Power Generation: Boiler combustion control, turbine governor interface, feedwater flow control
- Chemical Processing: Reactor temperature setpoint output, dosing pump speed control
- Water & Wastewater: Pump VFD speed reference, valve positioner output
Engineering Advantages
- OEM Compatibility: Direct plug-in replacement for existing Neles/Metso DCS racks — no firmware reconfiguration required
- Channel Isolation: Galvanic isolation prevents ground loop interference and protects the DCS backplane from field-side faults
- High Accuracy: 12-bit resolution ensures <0.1% full-scale output accuracy for tight process control loops
- Robust Construction: Conformal-coated PCB withstands industrial humidity, vibration, and airborne contaminants
- Hot-Swap Ready: Designed for live insertion/removal in compatible Neles DCS racks to minimize plant downtime
- Long Service Life: Industrial-grade components rated for 10+ years continuous operation in 24/7 process environments
System Architecture & Signal Flow
The AOU4 module resides in the Neles DCS I/O rack and communicates with the DCS controller via the proprietary backplane bus. The controller writes digital setpoint values to the module’s onboard D/A converter, which translates them into precision 4–20 mA current signals. Each channel drives a field device (valve positioner, VFD, or transmitter) independently, with galvanic isolation ensuring signal integrity across long cable runs in electrically noisy plant environments.
Signal path: DCS Controller → Backplane Bus → AOU4 D/A Converter → Isolated Current Driver → Field Terminal → Actuator/Device
Sourcing & Quality Verification
- Source: Genuine OEM Neles Automation modules sourced from authorized distributors and decommissioned plant inventories
- Inspection: Each unit undergoes visual inspection, PCB integrity check, and functional output verification before shipment
- Traceability: Original manufacturer labels and serial numbers preserved; documentation available on request
- Warranty: 90-day replacement warranty against manufacturing defects
- Packaging: Anti-static ESD bag + foam-lined carton for safe international transit
Procurement Process
- Confirm Compatibility: Verify your DCS rack model and backplane slot type matches AOU4 form factor
- Request Quote: Contact [email protected] with your PO number and required quantity
- Order Confirmation: Receive proforma invoice within 1 business day
- Payment & Export: Wire transfer (T/T) accepted; export documentation (commercial invoice, packing list, COO) provided
- Shipping: DHL / FedEx Express worldwide; typical lead time 3–7 business days
- After-Sales: Technical support available via email and WhatsApp for installation guidance
Technical FAQ
Q: Is the A413135 AOU4 compatible with all Neles DCS rack generations?
A: The AOU4 is designed for Neles Automation DCS I/O racks using the standard A4-series backplane. Please confirm your rack model with our technical team before ordering.
Q: Can the output range be reconfigured from 4–20 mA to 0–10 V?
A: The AOU4 is factory-configured for 4–20 mA current output. Voltage output mode is not supported on this module variant.
Q: What is the maximum cable length for the analog output signal?
A: With galvanic isolation and a 600 Ω maximum load, cable runs up to 500 m are achievable in typical plant wiring conditions.
Q: Do you provide a test report or functional verification certificate?
A: Yes. A functional test report confirming output accuracy across all 4 channels is available upon request at no additional charge.
Q: Is this module available for immediate shipment?
A: Stock availability varies. Contact us at [email protected] to confirm current inventory and lead time.
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