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Honeywell 8C-PAINA1
Product Name: Series 8 High-Level Analog Input Module (16-channel, 4–20 mA / 1–5 VDC, G3 coated)
Product Introduction: The 8C-PAINA1 (part number 51454470-175) is a high-density 16-channel analog input module for Honeywell Series 8 I/O, operating as part of the Experion PKS C300 controller platform. It digitizes standard 4–20 mA and 1–5 VDC process signals from industrial transmitters and sensors with 16-bit resolution, making it suitable for pressure, flow, liquid level, and displacement monitoring.
Detailed content
Technical Specifications:
- Channels: 16 single-ended analog inputs
- Input signal: 4–20 mA DC or 1–5 VDC (also supports 0–10 V / ±10 V ranges)
- A/D conversion: 16-bit sigma-delta
- Accuracy: ±0.1% of full scale at 25 °C
- Input impedance: 250 Ω internal precision sampling resistor
- Common-mode rejection: > 90 dB at 50/60 Hz
- Module voltage: 24 VDC nominal (supplied via IOTA bus)
- Module current: 105 mA @ 24 VDC
- Channel update rate: 100 ms refresh for all channels
- Isolation: Channel-to-channel and channel-to-system electrical isolation
- Operating temperature: 0 °C to +60 °C
- Conformal coating: ISA S71.04 G3 compliant
- Hazardous-area rating: Class I, Div. 2, Groups A/B/C/D, T4; ATEX Zone 2, AEx/Ex nA IIC T4
- Dimensions: approx. 60 × 155 × 144 mm; weight ~0.3 kg
- Certifications: CE, UL, CSA, ATEX
Functional Features:
- High precision with 16-bit resolution and channel isolation for immunity to on-site interference
- Independent per-channel configuration of range, filtering, and wire-break (disconnection) detection
- Onboard LED status indication plus system-level diagnostics for fast fault localization
- Hot-swappable — module can be replaced under power without interrupting the control loop
- G3 board-level coating for chemical, metallurgical, and other corrosive environments
- On-board filtering suppresses high-frequency noise and 50/60 Hz line interference
Application Scenarios: Conventional process monitoring in oil refineries, power stations, chemical plants, and similar continuous-process installations where 4–20 mA / 1–5 V signals are collected from pressure transmitters, flow meters, level sensors, and displacement transducers.
Structural & Material Characteristics: The module mates directly with a matching IOTA termination block. The “8C” prefix confirms factory conformal coating on the printed circuit board. The 16 single-ended channels are conditioned through a precision 250 Ω sampling resistor before 16-bit A/D conversion.
Working Principle: Field loop current (4–20 mA) flows through the internal 250 Ω precision resistor, developing a proportional voltage that is filtered and converted by the 16-bit sigma-delta ADC. For voltage signals (1–5 VDC), the same ADC digitizes the direct input. The digital result is transmitted across the I/O Link to the C300 controller for real-time monitoring, alarming, and PID calculation.
Installation Requirements:
- Install on a compatible IOTA such as 8C-TAINA1 / 8C-TAIN01 / 8C-TAIN11
- 24 VDC logic power is drawn directly from the IOTA bus
- Maintain panel temperature within 0 °C to +60 °C ambient
Usage Notes:
- WARNING: When migrating field loops from voltage (1–5 VDC) to current (4–20 mA), ensure the matching IOTA termination board completes the loop-current path through the 250 Ω resistor. Omission of this resistor will produce erroneous readings.
- Hot-swap is supported only on redundant IOTA baselines
- In G3 corrosive environments, periodically verify coating integrity
