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Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 8C-TAIX51 |
| Part Number | 51306979-175 |
| Manufacturer | Honeywell |
| Product Type | 24V DC Digital Input IOTA Module |
| Product Family | Experion PKS Series 8 / C300 I/O |
| Input Channels | 16 independent, fully isolated |
| Input Signal Types | Dry contact (no-voltage) or 24V DC active (NPN/PNP compatible) |
| Nominal Input Voltage | 24V DC (18–32V DC operating range) |
| Typical Channel Current | ≤5 mA |
| Input Impedance | ≥10 kΩ |
| Response Time | ≤1 ms (typical); <10 ms (maximum) |
| Electrical Isolation | 2500V DC channel-to-system |
| Filtering | Built-in hardware debounce & EMC filtering |
| Mounting | Series 8 IOTA 6″ base (non-redundant) or 12″ base (redundant) |
| Hot-Swap | Supported |
| Redundancy | Compatible with redundant I/O Link (IOLIM) |
| Diagnostics | Channel open/short, over-range, module fault |
| Operating Temperature | –40 °C to +85 °C (wide-temp industrial grade) |
| Storage Temperature | –40 °C to +85 °C |
| Humidity | 5%–95% RH, non-condensing |
| Protection Rating | IP20 (cabinet installation) |
| Certifications | CE, UL, CSA, Class I Div 2, ATEX Zone 2 |
| Weight | Approx. 0.3 kg |
| Origin | USA |
Main Features and Advantages
High-density, fully isolated discrete acquisition:The Honeywell 8C-TAIX51 packs 16 completely independent digital input channels into a single compact IOTA, with each channel galvanically isolated at 2500V DC from the system backplane. This architecture ensures that a short circuit, voltage spike or wiring error on any single input cannot propagate to adjacent channels or damage the C300 controller. For plants managing hundreds of discrete field points, the Honeywell 8C-TAIX51 delivers exceptional channel density while preserving the highest isolation integrity.Versatile input compatibility:Whether the field device is a dry mechanical contact (limit switch, auxiliary relay) or a powered 24V DC solid-state sensor, the Honeywell 8C-TAIX51 accommodates both without hardware reconfiguration. Its wide 18–32V DC operating window absorbs supply fluctuations common in large plants, while the ≤5mA per-channel current draw minimizes heat generation and extends component life. The Honeywell 8C-TAIX51 truly embodies “wire-and-forget” simplicity.Ultra-fast, noise-immune signal capture:With a typical response time of ≤1 ms and built-in hardware debounce filtering, the Honeywell 8C-TAIX51 reliably detects even the briefest pulse transitions from high-speed counting, encoder or flow-switch applications. The integrated EMC filtering rejects electromagnetic noise from variable frequency drives, motor starters and high-voltage switchgear, guaranteeing clean, glitch-free discrete data to the controller. This makes the Honeywell 8C-TAIX51 ideal for safety interlock, emergency shutdown and turbine protection applications where detection latency directly impacts personnel and asset safety.Comprehensive on-board diagnostics:The Honeywell 8C-TAIX51 continuously monitors every channel for open circuit, short circuit and out-of-range conditions, automatically reporting fault status to the Experion PKS operator station via the I/O Link. Module-level health, communication integrity and power status are similarly supervised, transforming the Honeywell 8C-TAIX51 from a passive input device into an active participant in the plant’s predictive maintenance strategy. Maintenance teams can pinpoint a faulty field wire or a failing sensor before it triggers a process upset.
