Product Core Brief

• Model: CC-TDIL01
• Brand: Honeywell
• Series: Experion PKS C300 Series-C Digital Input Simplex IOTA
• Core Function: 9-inch simplex termination base to route 32-channel 24VDC discrete contact signals from field limit switches and interlocks to paired digital input IOM
• Product Type: Simplex Digital Input IOTA (Input Output Termination Assembly)
• Key Specs: 32 field channels | Simplex single signal bus | 13–30VDC sense range | Open-wire fault detection circuitryNote: Discontinued end-of-life legacy DCS hardware, stocked exclusively as unopened New Surplus inventory; redundant counterpart = CC-TDIL11.

Key Technical Specifications

• Compatible IOM: CC-PDIL01 32-channel 24VDC digital input IOM
• Channel Count: 32 discrete input channels grouped into four independent 8-channel banks
• Valid Field Sensing Voltage: ON ≥13VDC; OFF ≤5VDC nominal 24VDC circuit
• Per-Channel Input Impedance: 4.2kΩ; minimum ON-state current 3mA
• Terminal Style: Spring-clamp compression terminals, accepts AWG16–22 solid/stranded copper wire
• Onboard Circuitry: Per-channel RC debounce filters, transient surge suppression, open-loop detection resistors
• Galvanic Isolation Rating: 1500VAC optical isolation boundary between field wiring and rack backplane bus
• Mount Standard: TS35 DIN rail fixed mounting, direct edge lock mating connector for paired IOM
• Backplane Operating Voltage: 18VDC to 36VDC nominal 24VDC rack supply
• Total Base Power Dissipation: 4.22W under full 32-channel energized load
• Ambient Operating Temperature: -40°C minimum to +85°C maximum cabinet ambient
• Hazardous Location Approval: FM Class I Div 2 Groups A/B/C/D cabinet mounting certified
• Environmental Protection: Full conformal coated PCB for corrosive refinery and offshore cabinet atmospheres
• Physical Dimensions: 229mm H × 52mm W × 175mm D; net weight 0.50kg

Product Introduction

This simplex termination base acts as the physical wiring interface for dry contact and 24VDC sinking discrete field devices, isolating wiring transients before noise propagates to the rack IOM’s optical sensing circuits. Built-in open-wire detection resistors enable the paired IOM to flag broken field cables to the Experion control strategy without external auxiliary hardware.Banked channel grouping isolates single-channel wiring shorts to one 8-channel segment, maintaining visibility for the remaining 24 discrete interlock status points during field wiring faults.

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-PDIL01 on a bench C300 rack powered by a Fluke 115 regulated 24VDC supply; run 24-hour cyclic channel toggle testing with simulated open-loop and short-circuit fault injection across all 32 channels.
3. Electrical Testing: Megger insulation resistance test >10MΩ between each field channel and rack bus edge connector; confirm open-wire detection resistance thresholds trigger consistent fault alerts on the bench controller.
4. Firmware/Config Backup: No onboard local firmware storage; capture high-resolution photos of channel bank enable 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 open-wire detection mismatch fault alarms; lock rack controller firmware to R400 or older before base swap to avoid constant minor rack fault alerts.❗ Jumper Configuration Loss: Capture high-res photos of channel bank address jumpers on the removed old unit; misconfigured bank jumpers lock out entire 8-channel contact groups from controller scan tables.❗ Wiring Incompatibility: This simplex base pinout does not interchange with redundant CC-TDIL11; cross-substitution without full field harness retermination eliminates half the signal path required for 1oo2 redundant discrete monitoring pairs.❗ Loop Voltage Miscalculation: Field supply voltage dropping below 13VDC triggers intermittent false OFF-state readings; install local 24VDC signal boosters for field cable runs longer than 600 meters.❗ ESD Component Damage Risk: Ungrounded technicians have destroyed optical isolator front-end circuits during IOM swap-outs; latent ESD damage creates random channel dropout that surfaces after 2–4 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 channel bank jumper positions via photo; unlatch the 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 bank jumper settings from reference photos, reterminate field wiring to matching channel terminal slots, fully seat and lock the CC-PDIL01 IOM onto the edge mating connector.
4. Power-on Test: Restore field power; access Control Builder diagnostic screens to confirm zero active open-loop or short-circuit fault flags and consistent ON/OFF state recognition across all 32 discrete input banks.

FAQ (Frequently Asked Questions)

Q: Can this simplex termination base be deployed in 1:1 redundant discrete interlock rack configurations?A: No. This unit only contains a single isolated signal bus. Redundant 32-channel digital input pairs require CC-TDIL11, 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 shutdown interlock loops.Q: Does the assembly support hot-swapping of the paired 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 surge suppression filter 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 open-wire detection circuit defects. Damage from field overvoltage surges, misconfigured bank 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 digital input IOTAs integrate matching discrete signal conditioning circuitry, but full field harness retermination and Control Builder discrete fault logic revalidation is mandatory; edge connector impedance and open-wire detection pinout do not match for unmodified direct swap.Q: What fault isolation do the banked RC filter circuits provide during field wiring shorts?A: Each 8-channel bank uses independent surge suppression and current limiting circuits; a shorted field contact wire only disables a single channel within its bank, leaving the remaining 31 discrete status inputs fully functional for process interlock visibility.Q: Can this base be paired with sourcing digital output IOM hardware like CC-PDOB01?A: Not supported. The edge connector pinout and onboard signal sense circuitry are engineered exclusively for CC-PDIL01 sinking digital input IOM hardware. Mismatched DO IOM pairing produces zero valid discrete state readings and permanent terminal circuit overload damage within minutes of power application.Q: Can multiple dry contact switches be wired in parallel to a single input channel terminal?A: Permitted only if combined total contact leakage resistance stays above the 30kΩ OFF-state detection threshold. Parallel switch wiring below this resistance threshold triggers persistent false ON-state fault alarms during normal process operation.