Component Snapshot At-a-Glance

• Model: METSO D201136, type designation AO4C
• Alt. P/N: D201190 (AO4H HART-enabled analog output personality); D201134 (8ch analog input personality); A413189 (main cabinet AO card, incompatible AP31 backplane pinout)
• Product Series: Metso DNA AP31 remote I/O personality module family, mates exclusively with RT node base chassis D200137
• Hardware Type: Horizontal plug-in personality PCB, front screw terminal block for standard 4–20mA actuators, 4 individual channel status LEDs, gold-plated rear edge connector to RT node backplane
• Key Feature: 4 fully galvanically isolated non-HART 4–20mA analog output channels, per-channel TVS surge suppression, loop short/open fault detection, no FSK HART modulation circuitry
• Primary Field Use: Drive simple modulating dampers, non-smart valve actuators, variable speed drive setpoint inputs on distributed AP31 remote I/O RT nodes; convert DCS digital setpoints to continuous analog current signals.

Hard-Numbers: Technical Specifications

• Protocol Support: No HART FSK modulation; proprietary DNA RT node internal parallel backplane bus
• Port Count: 4 independent standard 4–20mA analog output field terminal pairs
• Baud/Data Rate: RT node fixed 100ms full channel scan refresh cycle
• Operating Temperature: 0°C to +55°C cabinet operational; -40°C to +85°C storage
• Isolation Rating: 1500Vrms channel-to-backplane galvanic isolation
• Power Draw: 3.0W total module load at nominal 24VDC RT node backplane supply
• Main Input Power: 20–30VDC station cabinet battery, nominal 24VDC backplane feed
• Output Signal Range: 4–20mA sink/source analog output, 0–22mA overrange compliance
• Max Loop Load: 750Ω per channel resistive load
• Diagnostic Functions: Per-channel shorted loop, open actuator wire fault flagging to RT node CPU
• EMC Compliance: IEC 61000-6-2 industrial surge, VFD noise and cabinet vibration immunity
• PCB Treatment: Full acrylic anti-moisture conformal coating for pulp mill high-humidity, dusty MCC cabinets
• Physical Weight: 0.41kg single personality slot form factor

The Real-World Problem It Solves

Stacking low-density 2-channel AO personality cards wastes limited RT node rack slots and adds extra field wiring splices that corrode in humid pulp and mineral processing environments.Unisolated analog output wiring creates common-mode voltage drift from long field cable runs; EMI noise causes actuator hunting during large VFD motor startup transients. This non-HART unit costs less than D201190 AO4H for basic actuators that do not require device diagnostics.Where you’ll typically find it:

• Pulp & paper machine remote AP31 RT node cabinets for simple steam dampers, fan speed setpoint drives
• Mineral concentrator grinding/flotation MCC remote I/O racks for raw feed gate modulating actuators
• Wastewater treatment plant distributed field control nodes for non-smart aeration and sludge control dampersThis single-slot 4-channel standard analog output personality card delivers basic modulating control for non-HART field devices, eliminates ground loop signal skew, and cuts remote cabinet wiring maintenance points in half compared to low-density 2-channel alternatives.

Hardware Architecture & Under-the-Hood Logic

This personality card has no standalone processing MCU; it acts as isolated analog signal driver between RT node base unit D200137 logic and field non-HART actuators. All scan timing, setpoint conversion and fault reporting logic resides on the RT node main board.

1. 24VDC RT node backplane power feeds onboard multi-stage LC EMI filter to strip breaker and VFD switching noise before powering isolated DAC circuits and channel LED driver circuits.
2. Each of the 4 AO channels passes independent TVS surge suppression and galvanic isolation barrier to fully separate field ground potential and RT node control ground.
3. 16-bit DAC converts digital setpoint values from the backplane to precise 4–20mA current output; no HART FSK modem hardware installed on this revision.
4. Onboard fault logic monitors loop current for each channel; a shorted actuator wire or open field loop generates a diagnostic flag sent to the DNA CPU for HMI alarm display.
5. Front panel individual LED per channel: green = valid 4–20mA output active, red = open wire / short circuit fault for fast on-site troubleshooting without DCS workstation access.

Field Service Pitfalls: What Rookies Get Wrong

Swapping D201190 HART AO4H Or D201134 AI Input Personality Cards In Place Of D201136

New technicians grab alternate RT node spares without matching full part number. D201134 analog input cards cannot drive actuator loads; D201190 HART modules add unused FSK circuits and waste spare inventory cost for basic non-smart actuators.Field Rule: Only deploy D201136 AO4C for non-HART modulating actuator RT node slots; store HART AO4H and analog input personality modules in separate clearly labeled spare bins.

Hot-Swapping Personality Card While Live Actuator Field Wiring Remains Terminated

Junior crews pull the D201136 module while damper/valve wiring stays energized. Open-circuit transients surge backward through the RT node backplane, corrupting node I/O register data and triggering unplanned process interlock trips.Quick Fix: Lock out and de-energize all field 4–20mA actuator wiring at cabinet terminal blocks before extracting the D201136 personality card.

Overloading Single AO Channel With Combined Multiple Actuator Loads

Rookies wire two modulating dampers in parallel to a single D201136 output channel. Total loop resistance exceeds the 750Ω load limit, setpoint signals sag and actuators drift erratically during process load swings.Field Rule: One modulating actuator per AO channel maximum; multi-actuator circuits require dedicated signal splitters to isolate each load loop.

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.