Product Core Brief
- Model: 8C-IP0102
- Brand: Honeywell
- Series: Experion PKS C300 Series 8 I/O Family ⚠️ EOL — limited new surplus stock remaining
- Core Function: Process 16 bidirectional discrete digital signals for valve status, limit switches, and local solenoid control within C300 DCS chassis
- Product Type: Backplane-mount bidirectional digital I/O module
- Key Specs: 16 mixed DI/DO configurable channels | 24 VDC nominal field voltage | Native mechanical lock for 8C-TPOX01 IOTA | Condition: New Original Surplus
Product Introduction
The Honeywell 8C- is a Series 8 digital I/O card built for Experion PKS C300 distributed control systems, routing discrete field contact signals between cabinet backplanes and field termination assemblies without signal degradation. It works alongside analog Series 8 modules to build full mixed-signal control cabinets for refinery and chemical process loops.This card expands channel density compared to older 8-point 8C-IP0101 hardware, doubling discrete I/O capacity per chassis slot. OEM environmental testing records stable continuous operation from -20 °C to +60 °C cabinet ambient with <1 ms full channel scan latency.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Total Discrete Channels | 16 software-configurable DI / DO bidirectional points |
| Chassis Backplane Supply | 12 VDC or 24 VDC dual compatible rack power |
| Nominal Field Operating Voltage | 24 VDC; surge withstand range 10–30 VDC |
| Per-Channel Steady-State Current | 20 mA maximum continuous field loop draw |
| Channel-to-Backplane Isolation | 500 V AC dielectric withstand barrier |
| Matching Termination Base | 8C-TPOX01 dedicated IOTA wiring assembly |
| Full Channel State Scan Latency | <1 ms across all 16 active discrete points |
| Enclosure Ingress Rating | IP20, cabinet-only DIN rail chassis mounting |
| Operating Ambient Temp | -20 °C to +60 °C; storage -40 °C to +85 °C |
| Humidity Tolerance | 5%–95% RH non-condensing cabinet atmosphere |
| Safety Certifications | UL/cUL, CE, FM Class I Div 2 Groups A/B/C/D T4 |
| Physical Dimensions | 150 mm L × 100 mm H × 30 mm D; net weight 0.5 kg |
| Field Diagnostics | Open-circuit / short-circuit fault flagging per individual channel |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross serial numbers and part code 51454362-275 against Honeywell OEM batch logs to screen counterfeit aftermarket copies. Visually inspect gold backplane edge pins for bending, PCB solder joints for cold cracks, and front panel LED lenses for surface scratches.
- Live Functional Test: Insert module into a production C300 test chassis paired with a Fluke 115 regulated 24 VDC supply and matched 8C-TPOX01 IOTA. Run a 24-hour soak cycle with simulated switch and solenoid resistive loads, log channel state update latency and fault diagnostic trigger thresholds hourly.
- Electrical Parameter Test: Use a 500 V Megger to measure insulation resistance between each channel bank and chassis ground; pass threshold is >10 MΩ. Verify short-circuit current limiting behavior on all 16 discrete points.
- Firmware Verification: Read and record factory firmware revision via Experion Station configuration software; photograph front panel DIP switch bus termination jumper positions for site wiring reference records.
- Final QC & Packaging: Place the full I/O module inside static-dissipative poly bag. Affix a dated QC Pass sticker listing measured isolation resistance and total soak test runtime before palletized warehouse storage.
Replacement Pitfall Guide
❗ Firmware Mismatch Risk: The Honeywell 8C- firmware v4.1+ cannot hot-swap with C300 chassis running v3.8 or older without downloading updated control database logic. Unmatched firmware triggers persistent channel communication fault alarms.❗ IOTA Base Mismatch Risk: This module only mechanically locks to the 8C-TPOX01 termination assembly. Mating it with analog IOTAs like 8C-TAIM01 creates open field signal paths and unreadable discrete point data.❗ Field Cable Shield Grounding Risk: The 8C-TPOX01 chassis ground lug bonds to cabinet protective earth. Grounding discrete field cable shields at both the IOTA and field device creates ground loops that inject low-frequency noise and false open-circuit diagnostic flags.❗ Power Supply Headroom Miscalculation Risk: A fully populated Honeywell 8C- draws 4.2 W steady-state at 24 VDC. Size cabinet power supplies with 20% overhead; underrated racks drop voltage below 10 VDC and lock all channel outputs into safe-state off logic.❗ ESD Damage Risk: Exposed backplane gold contacts remain unshielded during IOTA disconnection. Use a grounded anti-static mat during card swaps in low-humidity cabinet spaces; static discharge scratches contact plating and generates intermittent channel dropout faults.Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- 8C- (Discrete Digital IOTA Termination Base) → 8C- : Direct Replacement — Native backplane lock and pinout matching, zero field wiring rework
- 8C-IP0101 (8-Point Series 8 Digital Module) → 8C- : Needs Adaptation — Chassis slot fits, control logic must re-map point addressing for expanded 16-channel capacity
- 8C-TAIM01 (Analog Multiplexer IOTA) → 8C- : Incompatible — Analog signal conditioning terminals cannot process discrete 20 mA digital field loops
Benchmarks
- Full 16-channel DI/DO state refresh latency: 0.72 ms (simulated switch/solenoid loads, 24 VDC nominal rack supply)
- Channel-to-chassis isolation resistance: >10 MΩ per bank (500 V Megger dielectric withstand test)
- Continuous power draw: 3.8 W average under full 16-channel 20 mA mixed input/output load
