Product Core Brief
- Model: D201136 (AO4C standard terminal; D201136L = long extended terminal variant)
- Brand: Metso (Valmet Legacy Automation)
- Series: MasterPiece 2001 ACN CS Analog Output I/O Family
- Core Function: Convert digital setpoint commands from the rack CPU to isolated 4–20mA analog signals to drive field valve positioners, steam regulators, and variable process actuators.
- Product Type: 3U Eurocard hot-swappable rack-mounted analog output module
- Key Specs: 4 galvanically isolated 4–20mA output channels | 1500VAC channel isolation | Per-channel short-circuit lockout
- Condition: New Original (New Surplus); Fully Discontinued EOL, OEM factory production terminated.
Key Technical Specifications
- Channel count: 4 independent isolated analog output channels
- Standard output signal: 4–20mA DC loop signal, 0–20mA selectable via MasterTool software
- Output precision: ±0.05% full scale linearity across full operating temperature range
- Isolation rating: 1500VAC photo-isolation per channel, IEC 61010 safety standard compliant
- Backplane supply range: 18–36VDC nominal 24VDC, max 8.2W power draw at full channel load
- Fault protection: Per-channel current limiting, short-circuit auto cutoff (<6ms response), reverse polarity lockout
- Hot-swap support: Live rack insertion without triggering rack-wide safe-state hold shutdown
- Operating ambient range: -20°C to +60°C cabinet; storage -40°C to +85°C
- Form factor: Standard 3U single-slot vertical Eurocard for MasterPiece 2001 control racks
- Physical dimensions: 305mm L × 235mm H × 68mm D; unit mass 0.60kg
- Front panel indicators: Individual LED per channel for active output and channel fault alarms
- Safety compliance: CE, UL, RoHS, SIL2 functional safety certification for continuous pulp/paper process loops
Product Introduction
Metso translates digital control setpoints from the MasterPiece 2001 rack CPU into standardized 4–20mA analog drive signals for process regulating valves and ND-series intelligent positioners. It serves as the primary analog control output hardware for dryer temperature, stock flow, and paper basis weight closed-loop control.
Its core differentiator is channel-independent galvanic isolation paired with single-channel fault containment. A shorted field loop only disables its assigned channel; the rest of the unit’s control outputs remain operational, avoiding full production line trips from a single wiring fault. The hardware pairs with D201189 HART analog input hardware to form complete bidirectional analog control loops.
Firmware/Software Versions & Upgrade Notes
- Supported MasterTool configuration software versions: v4.05 through v5.7; MasterTool v6.x drops native bus handshake compatibility with the unit.
- Recommended onboard firmware revision: Rev 07; Rev 05 contains output signal drift defects under high cabinet humidity.
- Upgrade risk warning: Downgrading the rack’s D201925 CPU firmware below v3.0.7 breaks communication with this hardware. Match CPU and I/O firmware release families before rack commissioning.
- Firmware storage location: All channel scaling and loop trim parameters save to the D200175 PMM personality module; execute a full PMM backup before any firmware flash operation.
- OEM constraint: Metso halted official firmware download support for all D-series I/O hardware after 2022; validate local firmware archive files prior to site deployment.
Frequently Asked Questions
- Is hot-swapping the unit safe while the control rack stays powered?Hot-swap circuits prevent full rack shutdown, but disconnect all field 4–20mA wiring before extraction. Live field shorts during swap create backplane voltage transients that corrupt recipe and loop tuning data stored on the PMM memory module. Always isolate field terminal blocks first.
- Can I source a direct drop-in OEM replacement now that this hardware is EOL?Metso no longer manufactures the module, and modern Valmet DNA I/O cards have mismatched Eurocard footprints and proprietary bus protocols that prevent plug-and-play swap. New Surplus unopened factory stock is the only direct replacement option; third-party refurbished units require full 24-hour load bench testing before site installation.
- Will swapping this device erase programmed loop scaling or output trim parameters?No control logic or analog scaling data is stored locally on the hardware. All 4–20mA range mapping, valve stroke trim, and fault alarm thresholds reside on the D200175 PMM personality module. Complete a PMM backup via MasterTool before any swap to guard against unexpected bus communication failures.
- What warranty coverage comes with New Surplus inventory versus refurbished units?Our New Surplus stock carries a 12-month full functional warranty matching original OEM spare coverage. Refurbished aftermarket parts ship with only a 3–6 month limited warranty, as aged internal electrolytic capacitors and worn terminal contacts create unquantified risk of mid-run process drift faults.
- Why is New Surplus priced higher than aftermarket refurbished equivalents?New Surplus inventory retains original factory component tolerances, zero operating hour wear, and full traceability to OEM production batches. Refurbished units reuse aged PCBs, generic replacement optocouplers, and skip full 24-hour thermal load testing; hidden internal defects lead to unplanned line downtime with far greater total operational cost than the upfront part price difference.
- Does the hardware support HART communication over the 4–20mA output loops?The base unit provides analog 4–20mA drive only, without native HART overlay. To read valve diagnostic data from ND9103HX positioners on the same control loop, pair each output channel with a D201189 HART analog input card for separate digital device polling.
- What maximum field loop resistance can each channel drive without signal attenuation?Each output channel supports up to 600Ω total loop resistance at 24VDC backplane supply. If field cable length creates higher resistance, install a loop-powered signal isolator close to the valve positioner to maintain stable 4–20mA linearity across full stroke.
