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Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 8C-PAON01 (Assembly Part No. 51454357-175) |
| Manufacturer | Honeywell Process Solutions |
| Product Type | High-Level Analog Output Module (Series 8, Conformally Coated) |
| Compatible System | Honeywell Experion PKS / C300 Controller |
| Output Channels | 16 isolated 4–20 mA current sourcing outputs |
| Output Signal Range | 4–20 mA DC (Directly Settable: 0 mA, 2.9 mA to 21.1 mA) |
| D/A Conversion Resolution | 12 to 16-bit |
| Accuracy | ±0.1% FS at 25°C (calibrated ±0.35% FS including linearity) |
| Output Ripple | 100 mV peak-to-peak at power line frequency across 250 Ω load |
| Load Resistance Range | 50 Ω to 800 Ω |
| Maximum Open-Circuit Voltage | 22 V |
| Response Time | Settles to within 1% of final value within 80 ms |
| Fail-Safe Behavior | Per-channel configurable: Hold Last Value or Shed to Safe Value |
| Diagnostics | Continuous open-wire detection, channel soft failure, internal self-test |
| Redundancy | Optional redundancy supported (10 ms max gap on switchover) |
| Power Supply | 24 V DC nominal (supplied via IOTA bus) |
| Power Consumption | Typical 3.5 W |
| Isolation | ≥ 1500 V (field loop to system backplane) |
| Conformal Coating | Yes (ISA S71.04 Class G3 compliant) |
| IOTA Compatibility | 8C-TAOX51 (Non-Redundant), 8C-TAOX61 (Redundant) |
| Operating Temperature | -40°C to +70°C (industrial cabinet: 0°C to +60°C) |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% RH non-condensing |
| Mounting | Series 8 IOTA termination assembly (rack slot) |
| Protection Rating | IP20 (indoor control cabinet) |
| Certifications | CE, UL, CSA, ATEX, SIL 2 |
| Lifecycle Status | Active / Legacy Series 8 hardware (MRO spare available) |
Main Features and Advantages
High-Density Precision Analog Output
The Honeywell 8C-PAON01 51454357-175 delivers 16 independent 4–20 mA current sourcing outputs from a single IOTA slot, representing one of the highest channel-density AO modules in the Experion PKS portfolio. With 12–16 bit D/A conversion resolution and ±0.1% full-scale accuracy at 25°C, the Honeywell 8C-PAON01 51454357-175 provides exceptional signal fidelity for precise control of modulating valves, VFDs, and I/P positioners. The module’s 50 Ω to 800 Ω load driving capability accommodates virtually all standard industrial actuators, while its 80 ms settling time from DAC code to output ensures responsive loop dynamics without sacrificing stability.
Per-Channel Configurable Fail-Safe (FAILOPT)
A defining safety advantage of the Honeywell 8C-PAON01 51454357-175 is its per-channel FAILOPT parameter, allowing engineers to independently configure each of the 16 outputs to either “hold last value” or “shed to a safe value” upon loss of communication with the C300 controller. This granular fail-safe architecture enables process-specific safety strategies—for instance, holding fuel gas valve position during brief communication interruptions while shedding cooling water valves to a fail-open safe state. Furthermore, the Honeywell 8C-PAON01 51454357-175 guarantees that outputs always drive to zero (the inherently safe state) in the event of internal module electronics failure, providing defense-in-depth for safety-instrumented functions.
Continuous Open-Wire Detection and Self-Diagnostics
The Honeywell 8C-PAON01 51454357-175 performs continuous open-wire detection on all 16 channels, identifying broken field loops before process deviations occur and reporting anomalies to the Experion PKS host for alarm generation. Integrated self-test routines, channel soft-failure monitoring, and internal diagnostics provide comprehensive visibility into module health. For commissioning engineers, this capability dramatically reduces mean-time-to-diagnosis (MTTD)—a broken wire or failed I/P positioner is immediately flagged by the Honeywell 8C-PAON01 51454357-175 rather than manifesting as an unexplained process upset requiring lengthy troubleshooting.
G3 Conformal Coating for Hostile Environments
The “8C” prefix of the Honeywell 8C-PAON01 51454357-175 signifies factory-applied conformal coating compliant with ISA S71.04 Class G3—the most stringent classification for equipment deployed in corrosive industrial atmospheres. This coating protects the module’s internal circuitry against sulfur compounds, chlorides, and high-humidity degradation common in refineries, chemical plants, and offshore platforms. Unlike its uncoated sibling (the 8U-PAON01), the Honeywell 8C-PAON01 51454357-175 is engineered for direct deployment in the harshest process environments without requiring additional protective enclosures.
Redundancy-Ready Architecture
Designed for maximum plant availability, the Honeywell 8C-PAON01 51454357-175 supports optional redundant configuration when paired with the 8C-TAOX61 IOTA termination block. During a redundant switchover, the module guarantees a maximum output gap of 10 ms, ensuring that critical control valves receive uninterrupted 4–20 mA signals even during module failover. This redundancy capability, combined with the module’s hot-swap compatibility, allows maintenance teams to replace a failed Honeywell 8C-PAON01 51454357-175 without interrupting production—a decisive advantage for continuous-process industries where unplanned downtime costs thousands of dollars per minute.
