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Honeywell 8C-PAONA1
Product Name: Series 8 16-Channel 4–20 mA Analog Output Module (Non-HART, G3 coated)
Product Introduction: The 8C-PAONA1 (part number 51454469-175) is a high-precision 16-channel analog output module in the Experion PKS Series 8 I/O architecture. It converts the C300 controller’s digital control algorithms into accurate 4–20 mA analog signals to drive final control elements such as valve positioners, variable-speed drives, and dampers. This “175” variant carries factory G3 conformal coating for corrosive-atmosphere protection.
Detailed content
Technical Specifications:
- Module type: Analog Output (Non-HART)
- Output channels: 16
- Output type: 4–20 mA DC
- Directly settable output current range: 2.9 mA to 21.1 mA
- Maximum output compliant voltage (@ 24 V supply, 22–28 VDC): 16 V
- Maximum open-circuit voltage: 22 V
- Load resistance (@ 24 V supply): 50–800 Ω
- Resolution: ±0.05% of full scale (nominal)
- Linearity: ±0.05% of full scale (nominal)
- Calibrated accuracy: ±0.2% of full scale at 25 °C
- Output ripple: < 100 mV peak-to-peak at power-line frequency across 250 Ω load
- Output temperature drift: 0.005% of full scale / °C
- Module voltage: 24 VDC
- Module current: 190 mA
- Maximum power consumption: 5.8 W
- Response time (DAC input code to output settling within 1%): 80 ms
- Redundancy switchover gap: 10 ms maximum
- Hot-swap (RIUP): Supported
- Operating temperature: -40 °C to +70 °C
- G3 conformal coated (resists H₂S, Cl₂, ammonia per ISA S71.04)
- Weight: 0.45 kg; Dimensions: 152 × 98 × 42 mm
Functional Features:
- Extensive self-diagnostics
- Optional redundancy for bumpless switchover
- Per-channel configurable FAILOPT (safe-state) behavior — output can be directed to hold last value or shed to a user-defined safe value
- Galvanic isolation between field wiring and internal system bus
- Streamlined non-HART signal path for cost-effective standard 4–20 mA loops
- Slim vertical form factor for natural-convection cooling in high-density cabinets
Application Scenarios: Driving analog final-control elements in continuous process industries — valve positioners, damper actuators, variable-speed drives, and recording/indicating devices — particularly in chemically aggressive atmospheres requiring G3 corrosion protection.
Structural & Material Characteristics: The module is built on a coated PCB housed in the Series 8 slim vertical form factor. It integrates D/A conversion, galvanic isolation, and per-channel safe-state logic. It mates with a Series 8 IOTA which provides field wiring termination and redundant I/O Link connectivity.
Working Principle: The C300 controller sends digital output codes over the I/O Link. The module’s D/A converter translates each code into a proportional 4–20 mA current. Onboard circuitry regulates the current through the field load (50–800 Ω), maintaining the setpoint against varying load resistance up to the 16 V compliant voltage limit. Self-diagnostics continuously monitor each channel’s integrity.
Installation Requirements:
- Mount on a compatible Series 8 AO IOTA (redundant IOTA recommended for high-availability applications)
- Provide 24 VDC system power via the IOTA bus
- For redundant operation, install a second 8C-PAONA1 on the same IOTA
- Verify the load resistance of each field device falls within 50–800 Ω at the supplied voltage
Usage Notes:
- This module is NON-HART. “Smart” valve positioners will still respond to the 4–20 mA signal, but the DCS cannot read HART digital diagnostics. For HART capability, use the 8C-PAOHA1 which is backward-compatible on the same IOTA (module configuration in Experion Control Builder must be updated).
- Do not exceed 22 V open-circuit or 16 V compliant voltage
- Hot-swap is supported, but confirm redundancy status before extracting a module in an active control loop
