Component Snapshot At-a-Glance
- Model: CC-PAON01 (factory base part 51410070-175)
- Alt. P/N: CC-PAOX01 (16-channel high-density AO, pinout incompatible); CC-TAON01 (FTE backplane AO variant, cannot cross-substitute standard racks)
- Product Series: Honeywell Experion PKS Series C standard non-FTE I/O, paired with C300 process controllers
- Hardware Type: Rack-mount 8-channel analog output module, hot-swap capable, requires dedicated standard IOTA terminal base
- Key Feature: Per-channel galvanic isolation, native HART 5/7, live output readback, user-programmable per-channel fail-safe state
- Primary Field Use: Convert C300 digital control logic to 4–20mA signals for smart valve positioners, modulating actuators and variable speed drives; pull HART actuator diagnostic data.
Hard-Numbers: Technical Specifications
- Protocol Support: Standard Series C I/O backplane bus, HART 5 / HART 7, chassis diagnostic telemetry
- Port Count: 8 fully isolated analog output channels; gold finger non-FTE backplane edge connector; mates to standard wiring IOTA base
- Baud/Data Rate: Fixed 50ms module scan cycle; HART digital modulation superimposed on 4–20mA control loops
- Operating Temperature: 0°C to +60°C cabinet operational; -40°C to +85°C storage
- Isolation Rating: 1500Vrms channel-to-backplane isolation, independent galvanic separation per output channel
- Power Draw: 24VDC ±10% rack supply, typical module power draw 3.2W
- DAC Resolution: 16-bit digital-to-analog conversion
- Output Signal Ranges: Software selectable 4–20mA, 0–20mA current loops
- Max Loop Load Resistance: 750Ω per channel at 24V field supply
- Accuracy Rating: ±0.1%FS at 25°C, ±0.15%FS full operating temperature range
- Diagnostics: Open wire detection, short circuit protection, output readback discrepancy alarm, HART comm loss
- Safety Compliance: ATEX Ex ec IIC T4 Zone2 cabinet installation certified
- Physical Weight: 0.32kg single module assembly
The Real-World Problem It Solves
16-channel CC-PAOX01 cards overcrowd small valve control racks and lack per-channel isolation; single channel short circuits can pull down the entire card without galvanic separation. Generic AO hardware without HART requires separate handheld communicator trips to pull valve stroke, calibration and fault data.Cards missing output readback cannot flag drift between controller setpoint and actual valve position, allowing off-spec process operation with no DCS alarm. Fixed fail-state hardware forces all channels to hold last value; CC-PAON01 lets you set independent safe shutdown values for each SIF loop.Where you’ll typically find it:
- Refinery reactor feed and overhead modulating valve control racks with HART smart positioners
- Fossil power plant boiler fuel gas, feedwater and steam turbine actuator control I/O panels
- Chemical batch unit DCS cabinets driving VFD pumps and modulating pH control valvesThis isolated 8-channel HART AO card adds built-in loop diagnostics, per-channel configurable fail states, and eliminates separate HART communicator field visits for actuator maintenance.
Hardware Architecture & Under-the-Hood Logic
This card uses independent isolated DAC and driver circuits for every output channel, paired with a dedicated HART modulation chip that does not distort the primary 4–20mA control signal.
- Digital setpoint commands from the C300 controller cross the isolated Series C backplane to the on-board DAC ASIC.
- Per-channel 16-bit DAC converts digital values to analog reference voltage, then drives a precision current output stage to generate 4–20mA loop current.
- Independent HART modulation circuit overlays digital actuator diagnostic data onto the analog current loop without shifting the primary PV output level.
- Built-in readback sampling circuit continuously measures actual loop current; triggers discrepancy alarm if measured value drifts more than configured deadband from controller setpoint.
- Short-circuit current limiting cuts output drive instantly if field wiring shorts; open wire detection flags broken loop wiring to the DCS event log.
- Front panel dual-color LED array displays module RUN status, individual channel fault flags, HART bus activity and redundant pair health for fast cabinet troubleshooting.
Field Service Pitfalls: What Rookies Get Wrong
Installing CC-TAON01 FTE AO Card Into Standard Non-FTE IOTA Chassis
New techs swap FTE CC-TAON01 spares into standard backplane racks to cut inventory costs. Mismatched edge connector pinout blocks all backplane communication, the module stays in fault state and all 8 valve control loops drop to fail-safe value.Field Rule: Only deploy CC-PAON01 on standard non-FTE Series C racks; store FTE and standard AO spares in separate labeled storage bins to avoid cross-installs.
Overloading Output Channels With Load Resistance Over 750Ω
Apprentices daisy-chain multiple valve positioners to one AO channel, pushing loop resistance above 750Ω. The output driver cannot maintain full 20mA current, valve position drifts and intermittent readback discrepancy alarms fire during load transients.Quick Fix: Limit each CC-PAON01 channel to one HART valve positioner; calculate total loop wire resistance before wiring to stay under 750Ω total load.
Skipping Per-Channel Fail-Safe Configuration For SIF Safety Loops
Crews leave default “hold last value” fail state active on emergency shutdown valves. If the I/O module faults mid-upset, the valve stays at operating position instead of moving to safe shut position.Field Rule: Program unique safe shutdown values for every ESD/SIL valve channel on CC-PAON01; force module fault during annual proof test to verify correct fail-state valve movement.
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.
