Product Core Brief

• Model: CC-PAIH02 (OEM PN: 51405038-376)
• Brand: Honeywell
• Series: Experion PKS C300 Series-C HART Analog Input IOM
• Core Function: Capture 4–20mA and voltage transmitter signals with full differential support on all 16 channels, process HART device diagnostics for closed-loop control loops
• Product Type: Universal High-Level HART Analog Input Module
• Key Specs: 16 fully differential capable channels | 4–20mA / 0–5V / 1–5V signal support | HART 7 multi-variable readback | Non-incendive per-channel loop powerNote: Discontinued end-of-life hardware, stocked exclusively as unopened New Surplus inventory; direct functional upgrade replacing CC-PAIH01.

Key Technical Specifications

• Compatible Termination Bases: Simplex CC-TAIX01 (6in), Redundant CC-TAIX11 (12in)
• Channel Layout: All 16 channels configurable single-ended or differential (supersedes CC-PAIH01 limited differential only on channels 13–16)
• Supported Field Signals: 4–20mA two-wire loop transmitters, 0–5V / 1–5V self-powered voltage sensors
• A/D Resolution: 16-bit sigma-delta conversion
• Static Accuracy: ±0.075% FS at 25°C; ±0.15% FS across -40°C to +70°C
• Common Mode Rejection: 70dB DC to 60Hz with 500Ω source imbalance
• Input Filter: Single-pole RC filter, -3dB cutoff at 6.5Hz to suppress VFD switching noise
• Onboard Circuitry: Independent non-incendive 24V loop supply per channel, 250Ω precision shunts selectable via IOTA jumpers
• Per-Channel Diagnostics: Open wire, short circuit, overload, HART device offline detection
• Backplane Operating Voltage: 18VDC to 36VDC nominal 24VDC rack supply
• Total Module Power Draw: 4.7W under full 16-channel simultaneous load
• Ambient Operating Temperature: -40°C minimum to +70°C maximum cabinet ambient
• Hazardous Location Approval: FM Class I Div 2 Groups A/B/C/D cabinet mounting certified
• Environmental Coating: Full conformal coated PCB for corrosive refinery and offshore cabinet environments
• Physical Dimensions: 260mm H × 52mm W × 175mm D; net weight 0.47kg

Product Introduction

This universal analog IOM resolves the CC-PAIH01 hardware limitation of restricted differential input access by enabling differential measurement on every channel, simplifying wiring for long-distance noisy transmitter runs. Integrated HART modem circuitry retrieves secondary process variables and device fault codes without external multiplexers.Selectable 250Ω shunt jumpers on the paired IOTA allow rapid switching between current and voltage sensor wiring without hardware swaps, reducing marshalling cabinet spare part variety for mixed-signal plant loops.

QA & Testing SOP (Transparency Building)

1. Incoming Inspection: Cross-reference serial barcodes against Honeywell OEM batch manifests; inspect PCB for cracked traces, bent edge connectors, and coating delamination; verify factory anti-static bag seal integrity.
2. Live Testing: Mate with matching TAIX-series IOTA on a bench C300 rack powered by a Fluke 115 regulated 24VDC supply; run 24-hour cyclic 4–20mA and voltage ramp testing with simulated open/short fault injection across all 16 channels in both single-ended and differential modes.
3. Electrical Testing: Megger insulation test >10MΩ between each input channel and rack backplane; confirm matched linearity across differential channel pairs and proper HART handshake with calibrated smart transmitters.
4. Firmware/Config Backup: No local onboard firmware storage; capture high-resolution photos of IOTA signal type jumpers for field service reference before bench testing.
5. Final QC & Packaging: Attach serialized printed test pass tag; seal unit in foam-lined static-shielded bag to protect edge multiplex connectors during warehouse storage and transit.

Installation Pitfalls & Guide (Engineer to Engineer)

❗ Firmware Rev Compatibility Risk: Experion PKS R400 and older releases lack full 16-channel differential diagnostic reporting; upgrade C300 controller firmware to R410 or newer before module swap to avoid missing channel noise fault alerts.❗ Jumper Configuration Loss: Capture high-res photos of 250Ω shunt jumpers on the removed old unit; misconfigured jumpers produce clipped 20mA signals or invalid voltage PV readings.❗ Wiring Incompatibility: This hardware cannot substitute current-only CC-PAIH51 without full IOTA jumper rework; CC-PAIH51 IOTAs lack voltage signal routing traces for differential measurement.❗ Loop Resistance Miscalculation: Combined wire + transmitter resistance exceeding 650Ω collapses full-scale 20mA signals; install inline signal booster supplies for field runs longer than 800 meters.❗ ESD Component Damage Risk: Ungrounded technicians have destroyed differential ADC front-end circuits during hot-swap attempts; latent damage creates unbalanced channel pair readings that surface after 2–3 weeks of continuous runtime.

4-step replacement guide:

1. Pre-install: Activate cabinet LOTO on 24VDC field power; secure grounded anti-static wrist strap to DIN rail ground lug.
2. Removal: Document shunt jumper positions via photo; unlatch the unit from its TAIX-series IOTA base, disconnect inter-module Type5 ribbon cables sequentially, remove all field wiring channel by channel.
3. Install: Seat new hardware fully onto matching TAIX-series termination base, replicate all shunt jumper settings from reference photos, reterminate field wiring to matching channel terminals, lock ribbon cable connectors until audible engagement click.
4. Power-on Test: Restore field power; open Control Builder diagnostic screens to confirm stable PV values in both single-ended and differential mode, zero open/short fault flags, and successful HART device communication on all configured channels.

FAQ (Frequently Asked Questions)

Q: Can this module serve as a direct drop-in replacement for CC-PAIH01 without rack harness changes?A: Physical form factor and backplane pinout match for slot swap, but every channel must have its IOTA jumper reconfigured to enable differential capability across all 16 points. Control Builder channel signal type blocks require re-download to activate full differential scanning logic.Q: Does the hardware support hot-swapping while the C300 rack remains energized?A: The IOM itself supports rack hot-swap, but field 24VDC power must be fully isolated before disconnecting the IOTA ribbon cable. Live field power disconnection induces voltage transients that damage the differential analog front-end circuits on the PCB.Q: What warranty coverage applies to bench-tested surplus stocked units?A: All inventory units carry a 12-month functional warranty covering factory PCB, ADC, and HART modem circuit defects. Damage from field surge overload, misconfigured shunt jumpers, or ungrounded ESD handling is excluded from all coverage terms.Q: Is there a direct drop-in modern replacement for this discontinued hardware?A: Current Series-C universal AI modules integrate full differential HART functionality, but full field harness retermination and Control Builder loop logic revalidation is mandatory; differential scan timing and shunt jumper mapping do not match for unmodified direct swap.Q: What noise rejection benefit does full differential mode deliver for long field cable runs?A: Differential measurement cancels common-mode induced noise from parallel VFD power cabling, cutting process variable signal fluctuation by up to 70% on cable runs exceeding 500 meters versus single-ended wiring configurations.Q: Can mixed CC- and CC-PAIH51 IOMs be installed as a redundant pair on a CC-TAIX11 IOTA?A: Not supported. Mixed signal IOM pairs create unbalanced A/D conversion timing between primary and backup hardware, triggering continuous redundant path mismatch alarms and unstable closed-loop PID regulation. Identical model IOMs are required for valid redundant deployments.Q: Can this termination base connect to low-level TC/RTD multiplex IOM hardware like CC-PAIM01?A: No. The IOTA’s onboard 250Ω shunt resistors and high-level signal routing are engineered exclusively for 4–20mA / voltage transmitters. Low-level millivolt sensor hardware requires separate TAIM-series IOTAs with dedicated cold-junction compensation circuitry.