Description
1. Unboxing & Physical Snapshot
- Model & Brand: 8C‑PAONA1, Honeywell Experion C300 Series‑8 DCS (G3 conformal coated, non‑HART analog output)
- Physical Dimensions (Approximate W x H x D): 42 mm × 274 mm × 216 mm
- Estimated Shipping Weight: 1.0 lb (includes module assembly, static‑shield bag, rigid foam‑lined carton; unit net weight 0.88 lb)
- What’s in the Box: 16‑channel non‑HART analog‑output IOM, integrated backplane edge connector, OEM printed installation datasheet; matching non‑redundant coated termination IOTA 8C‑TAOXA1 is sold separately (procure compatible termination hardware during cabinet retrofits to avoid commissioning delays for control valves, damper actuators and final‑element regulatory loops)
2. Product Introduction (Structure B – Architecture hook)
This 8C‑PAONA1 analog‑output module inserts into dedicated slots within the Honeywell C300 Series‑8 chassis and mates with 8C‑TAOXA1 field termination assembly to deliver 4‑20 mA drive signals to valve positioners and process actuators. Fully engaged backplane contacts deliver deterministic analog set‑point commands and chassis safety bonding; partial seating yields drifting output current and intermittent actuator mis‑positioning that mimic field‑valve or wiring faults within closed‑loop regulatory control strategies.
Reliability teams must validate full part‑number and hardware revision prior to spare rotation. Mechanically interchangeable C‑series AO modules exist with HART communication capability (8C‑PAOHA1) or non‑coated PCB construction (8U‑PAONA1). A physically‑fit mismatched card locks to the C300 backplane yet lacks HART or harsh‑environment protection; conversely, deploying a HART‑equipped substitute into a non‑HART loop creates unexpected diagnostic alarms. No software parameter adjustment can resolve underlying hardware feature‑set mismatch.
3. Core Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | Series‑8 16‑channel analog‑output module, non‑HART, conformal‑coated (G3 harsh‑environment) |
| Output Channels | 16 galvanically‑isolated 4‑20 mA current outputs |
| Output Range | Configurable 4‑20 mA; open‑wire detection per channel |
| Load Resistance | 50 Ω‑800 Ω maximum field load |
| Isolation | Channel‑to‑backplane optical galvanic isolation |
| Channel Behaviour | Per‑channel FAILOPT safe‑state: hold last value or configured fail‑safe current levelHoneywell |
| Operating Supply Voltage | 24 VDC nominal; 21.6 VDC‑26.4 VDC operational range |
| Max Module Power Draw | 5.8 W |
| Operating Ambient Temperature | 0 °C to +60 °C (chassis cabinet ambient air) |
| Storage Temperature Range | ‑40 °C to +85 °C |
| Backplane Interface | Honeywell C300 Series‑8 proprietary chassis bus; Hot‑swap / OIR supported |
| Enclosure Rating | IP20 (cabinet‑mount‑only installation) |
| Conformal Coating | Factory‑applied acrylic conformal coat for corrosive‑atmosphere serviceHoneywell |
4. Global Compliance & Industry Certifications
- CE Mark aligned with EMC and low‑voltage equipment directives
- UL/cUL Listed for industrial DCS I/O hardware
- CSA certification for North American classified cabinet deployments
- ATEX / IECEx Zone 2 qualification for eligible manufacturing lots
UL listing validates channel‑to‑chassis isolation, short‑circuit withstand and safe‑state performance, mitigating ground‑loop noise and fault‑propagation risk for critical closed‑loop control outputs. Verify specific‑lot certifications against OEM hardware documentation.
5. Long‑Term Storage & Asset Preservation Guide
Keep this analog‑output module sealed inside its original ESD‑shielding bag for all warehouse shelf storage. Open static pouch exclusively at a properly‑grounded ESD workstation; unprotected fingertip contact leaves ionic residues accelerating trace corrosion beneath conformal coating.
Maintain storage‑vault relative humidity below 60 percent. Sustained high‑humidity exposure corrodes gold‑plated backplane edge contacts and degrades the acrylic conformal layer. Corroded contacts generate drifting 4‑20 mA output levels and sporadic open‑wire diagnostic alarms after chassis insertion that evade standard power‑on self‑diagnostics.
No user‑serviceable lithium backup battery resides on this I/O assembly. Inspect edge‑connector pins every 18 months for oxidation or physical bending; deformed pins create partial contact and erratic actuator‑drive behavior.
6. Physical Installation Prerequisites
Slide the module fully into the C300 Series‑8 chassis slot and engage the built‑in locking latch until positive audible click is achieved; hot‑swap removal‑insertion is permitted under approved maintenance lock‑out‑tag‑out procedures. Maintain minimum 40 mm vertical clearance above and below the occupied slot for natural convection cooling. Restricted airflow elevates component junction temperatures and introduces analog‑output offset drift.
Torque chassis protective‑earth connections to 1.1 N·m. Tie chassis protective‑earth to facility plant ground bus, never to isolated instrument signal grounds. Metal‑to‑metal chassis‑to‑module contact delivers EMI suppression for inductive valve‑positioner loads. Route field analog‑output cabling physically separated from high‑current motor and contactor wiring runs. Always pair with matching 8C‑TAOXA1 coated termination assembly for field‑actuator wiring connections.
7. Buyer’s FAQ
Q: What Harmonized System tariff code applies to 8C‑PAONA1 for cross‑border shipments?
A: This legacy Honeywell DCS analog‑output I/O module maps to HS 853710 for industrial control electronic assemblies. Customs inspectors commonly require full part‑number and hardware‑revision documentation. Confirm classification in cooperation with your import broker before tendering freight.
Q: How does Country of Origin impact audit acceptance for this end‑of‑life DCS spare?
A: Plant audit checklists cross‑reference nameplate Country‑of‑Origin markings with site‑approved asset registers. Parallel‑sourced spares carrying mismatched COO markings trigger formal audit observations, even when bench current‑source simulator testing appears normal.
Q: Should supplementary shipping insurance be purchased for this obsolete C300 analog‑output spare?
A: Yes. Transit shock can bend delicate backplane edge pins or produce invisible PCB micro‑cracks. Many internal defects are not visible during superficial visual inspection. Secure full‑value all‑risk coverage; standard carrier cargo terms exclude hidden electronic‑board damage.
Q: Does the delivered 8C‑PAONA1 ship pre‑loaded with site‑specific analog‑channel configuration?
A: Factory‑sealed OEM units hold base firmware matching manufacturing lot date‑code. Site‑specific channel scaling, fail‑safe FAILOPT states and alarm thresholds are never pre‑loaded. Configure output ranges, fail‑safe behaviour and validate 4‑20 mA drive performance before placing the spare into live closed‑loop process duty.
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