Product Core Brief

• Model: CC-TAIX01 (OEM PN: 51308364-175)
• Brand: Honeywell
• Series: Experion PKS C300 Series-C High-Level Analog Input Simplex IOTA
• Core Function: 6-inch single-path termination base to route and condition 4–20mA / voltage HART transmitter signals for non-redundant analog IOM deployments
• Product Type: Simplex High-Level Analog Input IOTA (Input Output Termination Assembly)
• Key Specs: 16 field channels | Jumper-selectable 250Ω shunts | HART signal coupling | Simplex single signal busNote: Discontinued end-of-life hardware, stocked exclusively as unopened New Surplus inventory; redundant matching counterpart = CC-TAIX11.

Key Technical Specifications

• Compatible IOM Models: CC-PAIN01 universal mixed-signal AI, CC-PAIH51 current-only HART AI, CC-PAIH02 full differential HART AI
• Channel Layout: 16 channels configurable single-ended or limited differential via IOM firmware
• Supported Field Signals: 4–20mA two-wire HART transmitters, 0–5V / 1–5V self-powered voltage sensors
• Onboard Circuitry: Per-channel jumper selectable 250Ω precision shunts, EMI RC noise filters, transient surge suppression, HART signal coupler networks
• Terminal Style: Spring compression screw terminals, accepts AWG16–22 solid/stranded copper wire
• Common Mode Rejection: 70dB DC to 60Hz with up to 500Ω source imbalance
• Input Filter Response: Single-pole RC filter, -3dB cutoff at 6.5Hz to suppress VFD switching noise
• Mount Format: TS35 DIN rail fixed mount, direct edge locking connector to paired analog IOM
• Backplane Operating Voltage: 18VDC to 36VDC nominal 24VDC rack supply
• Total Base Power Dissipation: 2.46W 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 atmospheres
• Physical Dimensions: 152mm H × 52mm W × 175mm D; net weight 0.38kg

Product Introduction

This simplex termination base delivers unmirrored single-path signal routing for standard non-redundant analog control loops. Jumper-swappable 250Ω shunts eliminate separate marshalling resistors when wiring 4–20mA transmitters, cutting auxiliary cabinet hardware count.Integrated HART couplers pass multi-variable diagnostic data from field smart instruments to the paired IOM without external multiplexers, while isolated surge networks contain field wiring transients before they damage the rack-mounted analog conversion circuits.

QA & Testing SOP (Transparency Building)

1. Incoming Inspection: Cross-reference serial barcodes against Honeywell OEM batch manifests; inspect PCB for cracked traces, bent IOM edge mating pins, and damaged terminal spring contacts; verify factory anti-static packaging seal integrity.
2. Live Testing: Mated with spare CC-PAIH02 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 signal modes.
3. Electrical Testing: Megger insulation resistance test >10MΩ between each field channel and IOM mating connector bus; confirm matched shunt resistance values and stable HART handshake communication with calibrated smart transmitters.
4. Firmware/Config Backup: No onboard local firmware storage; capture high-resolution photos of signal type 250Ω shunt 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 mating pins during warehouse storage and transit.

Installation Pitfalls & Guide (Engineer to Engineer)

❗ Firmware Rev Compatibility Risk: Experion PKS R401 and newer releases enforce strict redundant path mismatch fault alarms; lock rack controller firmware to R400 or older before base swap to avoid constant minor rack fault alerts on simplex racks.❗ Jumper Configuration Loss: Capture high-res photos of 250Ω shunt jumpers on the removed old unit; misconfigured jumpers produce clipped 20mA full-scale signals or invalid voltage PV readings in closed-loop control strategies.❗ Wiring Incompatibility: This simplex base pinout does not interchange with redundant CC-TAIX11; swapping without full field harness retermination removes the dual mirrored signal bus required for valid 1:1 redundant analog IOM pairs.❗ Loop Resistance Miscalculation: Combined wire + transmitter resistance exceeding 650Ω collapses full-scale 20mA signal levels; install inline signal booster power supplies for field cable runs longer than 800 meters.❗ ESD Component Damage Risk: Ungrounded technicians have destroyed HART filter front-end circuits during IOM swap-outs; latent ESD 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 analog IOM from the base edge connector, remove each field wire sequentially channel by channel, slide the unit off TS35 DIN rail.
3. Install: Mount new hardware to DIN rail, replicate all shunt jumper settings from reference photos, reterminate field wiring to matching channel terminal slots, fully seat and lock the paired analog IOM onto the edge mating connector.
4. Power-on Test: Restore field power; open Control Builder diagnostic screens to confirm stable PV values, zero open/short fault flags, and consistent HART device communication across all configured 16 input channels.

FAQ (Frequently Asked Questions)

Q: Can this simplex termination base be used in 1:1 redundant analog control rack configurations?A: No. This unit only contains a single isolated signal bus. Redundant 16-channel analog measurement pairs require CC-TAIX11, which includes dual mirrored field wiring buses and cross-check signal routing to the paired backup IOM. Using this simplex base in a redundant slot breaks full fault coverage required for IEC 61511 critical reactor and distillation control loops.Q: Does the assembly support hot-swapping of the paired analog IOM while the C300 rack remains energized?A: The IOM hardware supports rack hot-swap, but field 24VDC power must be fully isolated before disconnecting the edge mating connector from the base. Live field power disconnection induces voltage transients that damage the onboard HART filter and surge suppression networks 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, terminal spring, and shunt coupling 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 termination hardware?A: Current Series-C universal analog IOTAs integrate matching jumper-configurable shunt circuitry, but full field harness retermination and Control Builder loop logic revalidation is mandatory; edge connector impedance and HART coupling timing do not match for unmodified direct swap.Q: What noise rejection benefit does differential wiring deliver on this base?A: Differential signal routing cancels common-mode EMI induced 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-PAIN01 and CC-PAIH51 IOMs be installed as a redundant pair on a CC-TAIX11 redundant base?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 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.