Honeywell 8C-PAOHA
Honeywell 8C-PAOHA
Honeywell 8C-PAOHA
Honeywell 8C-PAOHA
Honeywell 8C-PAOHA

Honeywell 8C-PAOHA | ControlEdge Series 8-Channel Process Analog Output Unit

  • Brand: Honeywell
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    Model: 8C-PAOHA
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    Product Type: Analog Output Module
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    Series: Experion PKS C300 (Distributed Control System I/O)
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    Core Function: Provides 8 isolated analog output channels to transmit control signals from C300 controllers to field actuators (e.g., control valves, VFDs) for process regulation; supports HART communication for diagnostics.
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    Key Specs: 8 channels, ±0.1% full-scale accuracy, 2500VAC isolation, supports 4-20mA/HART/0-10V outputs, -40°C to +70°C operating temperature.
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Part number: Honeywell 8C-PAOHA
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Description

8C-PAOHA: Product Overview
The 8C-PAOHA is an 8-channel analog output module designed for integration into Honeywell’s Experion PKS C300 distributed control system (DCS). It serves as a critical interface between C300 controllers and field actuators (e.g., control valves, variable frequency drives, damper motors), converting digital control signals into precise analog outputs (4-20mA, 0-10V, or 0-5V) to regulate industrial processes. Its primary role is to ensure accurate, responsive actuation in applications where maintaining setpoints (e.g., flow, pressure, temperature) is essential for safety, efficiency, and product quality.
Functionally, the module processes 16-bit digital values from the C300 controller, applies linearization and scaling, and outputs calibrated analog signals to field devices. It supports individual channel configuration (output type, range, fault behavior) via Experion PKS engineering tools, with HART 7 protocol integration for diagnostic data transmission (e.g., valve stem position, actuator health). As part of the C300 I/O family, the 8C-PAOHA inherits the platform’s high-speed I/O link, hot-swappable architecture, and unified engineering environment (ControlEdge Builder), simplifying configuration and maintenance. This design aligns with compliance to IEC 61508 (SIL 2) and standards like API 556 (refinery instrumentation), making it suitable for continuous processes in oil refining, chemical manufacturing, and power generation.

Honeywell 8C-PAOHA

Honeywell 8C-PAOHA

8C-PAOHA: Technical Specifications
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    Model Number: 8C-PAOHA
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    Manufacturer: Honeywell
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    Product Type: Analog Output Module
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    Number of Channels: 8 (individually isolated)
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    Output Types: 4-20mA (sink/source, HART 7 supported), 0-10V DC, 0-5V DC
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    Accuracy: ±0.1% of full scale (FS) at 25°C; ±0.2% FS over operating range
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    Resolution: 16-bit (65536 steps)
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    Isolation Voltage: 2500VAC (channel-to-channel, channel-to-bus)
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    Load Impedance: 4-20mA: 0-750Ω; 0-10V: ≥1kΩ
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    Power Supply: 24V DC (nominal, 18-30V DC range) from C300 chassis
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    Power Consumption: 3W (typical, all channels active)
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    Operating Temperature: -40°C to +70°C
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    Humidity Range: 5% to 95% non-condensing
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    Certifications: SIL 2 (IEC 61508), CE, UL, ATEX Zone 2 (optional)
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    Dimensions: 25mm x 128mm x 115mm (width x height x depth, fits C300 I/O slot)
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    Weight: 0.2kg
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    Diagnostics: Channel fault (open/short circuit), power status, communication heartbeat, HART device status
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    Hot Swap Support: Yes (plug-and-play replacement without system shutdown)

    Honeywell 8C-PAOHA

    Honeywell 8C-PAOHA

Core Features & Customer Value​
High-Channel Density Reduces Cabinet Footprint: With 8 output channels per module, the 8C-PAOHA minimizes I/O module count in control cabinets. For engineers designing systems with multiple actuators (e.g., a refinery’s distillation column with 6 control valves and 2 damper motors), this cuts cabinet space by 40% compared to 4-channel alternatives, simplifying wiring and material costs.
Galvanic Isolation Ensures Signal Integrity: The 2500VAC isolation between channels and the C300 bus prevents ground loops and EMI from industrial equipment (e.g., motors, drives) from distorting analog outputs. In a chemical plant’s reactor cooling system, this ensures precise valve positioning—critical for temperature control—even near high-power agitators.
HART 7 Support for Predictive Maintenance: Integration with HART 7 enables transmission of diagnostic data (e.g., valve stem friction, actuator cycle count) alongside control signals. Engineers can retrieve this data via ControlEdge Builder to identify degrading actuators (e.g., a sticky control valve) before they impact process stability, reducing unplanned downtime by up to 25%.
Hot-Swappable Design Minimizes Downtime: The module can be replaced while the system remains powered, essential for continuous processes like oil refining. Technicians simply remove the faulty unit and insert a new one; the C300 controller automatically reloads configuration data via I/O link. This eliminates scheduled shutdowns for module replacement, saving thousands in lost production per incident.
SIL 2 Certification for Safety-Critical Applications: When integrated into a Honeywell Safety Manager SIS, the 8C-PAOHA meets SIL 2 requirements (IEC 61508), enabling its use in safety functions like emergency valve closure or pressure relief actuation. Its fault-tolerant design (hardware fault tolerance ≥1) reduces the probability of dangerous failures, aligning with audit requirements for regulated industries.
Typical Applications​
The 8C-PAOHA is deployed in continuous process control systems requiring precise analog actuation. In a petroleum refinery’s fluid catalytic cracking (FCC) unit, it drives 8 control valves regulating catalyst flow and regenerator air. The module’s 4-20mA outputs adjust valve positions based on C300-calculated setpoints, maintaining optimal conversion rates while meeting EPA emission limits. HART diagnostics alert staff to a valve actuator fault during routine monitoring.
At a chemical plant’s polymerization reactor, the 8C-PAOHA controls 8 temperature-regulating valves (0-10V outputs) for heating steam. Its ±0.1% accuracy ensures reactor temperature stays within 1°C of the setpoint, maximizing product purity. Hot-swap capability allows maintenance during planned turnarounds without halting production.
In a municipal water treatment plant, the module operates 8 variable frequency drives (VFDs) for pump speed control (4-20mA outputs). It adjusts pump rates based on reservoir level sensors, with diagnostics flagging a VFD communication fault before pump overload occurs.

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