Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Models | 8C-TAIX61 (Coated), 8U-TAIX61 (Uncoated) |
| Part Number | 51306977-175 |
| Manufacturer | Honeywell |
| Product Type | Analog Input IOTA Module |
| System Compatibility | Experion PKS Series 8, PlantCruise, C300 Controllers |
| Input Channels | 16 Single-Ended |
| Input Signal Type | 4-20 mA (2-wire or self-powered transmitters) |
| Input Impedance | 200 Ω |
| A/D Converter Resolution | 16 Bits |
| Scan Rate | 50 ms |
| Accuracy | ±0.075% of full-scale (23.5°C ± 2°C); ±0.15% of full-scale (0 to 60°C) |
| Normal Mode Rejection Ratio (60 Hz) | 19 dB |
| Common Mode Rejection Ratio | 70 dB |
| Maximum Input Voltage (No Damage) | ±30 Volts |
| Isolation | Galvanic isolation; channel-to-backplane 2500VAC |
| Non-Incendive Field Power | Yes, with individually protected current limiting circuits for Class 1 Div 2 |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| IOTA Size | 12 inches (304 mm) |
| Module Dimensions | Approx. 29.5 x 12 x 7 cm |
| Weight | Approx. 0.38 – 0.59 kg |
| Protection | IP20 (cabinet installation) |
| Certifications | CE, UL, CSA, SIL 2, Class I Div 2 / Zone 2 |
Main Features and Advantages
High-Density 16-Channel Analog Input: The Honeywell 8C-TAIX61 and 8U-TAIX61 modules provide 16 single-ended analog input channels, delivering exceptional channel density in a compact 12-inch IOTA form factor . This high-density design allows system integrators to maximize I/O points within limited cabinet space, reducing overall footprint and wiring complexity. Each channel of the Honeywell 51306977-175 is optimized for 4-20 mA current signals from 2-wire or self-powered transmitters, ensuring compatibility with a wide range of industrial sensors. The 16-bit A/D converter resolution delivers precise measurement, with hardware accuracy of ±0.075% of full-scale under nominal conditions, enabling accurate process variable acquisition for demanding control applications .
Fast Scan Rate and Real-Time Performance: With a 50 ms input scan rate, the Honeywell 8C-TAIX61 and 8U-TAIX61 modules ensure rapid, deterministic data acquisition for real-time process monitoring . This fast loop scanning capability allows control strategies to respond quickly to process changes, improving overall system responsiveness and stability. The modules incorporate extensive self-diagnostics and channel-level fault detection, including loop break, short circuit, and over-range alarms, enabling proactive maintenance and minimizing unplanned downtime .
Robust Non-Incendive Field Power and Redundancy: A standout feature of the Honeywell 51306977-175 is its integrated non-incendive field power for 4-20 mA loops, eliminating the need for external user-supplied field power . Each channel includes individually protected current limiting circuits, ensuring safe interfacing with transmitters in Class 1 Division 2 hazardous environments . The and modules support optional redundancy, enabling hot-standby configurations that provide bumpless switchover in the event of a fault, maximizing system availability and operational continuity in mission-critical processes .
Coated and Uncoated Variants for Environmental Flexibility: The variant features a conformal coating that provides enhanced protection against moisture, dust, and corrosive atmospheres, making it ideal for harsh industrial environments such as chemical plants and offshore platforms . The variant offers an uncoated, cost-effective solution for standard indoor control cabinet installations . This dual-option design ensures that the Honeywell 51306977-175 family can be optimally specified for virtually any application environment.