Honeywell 8C-TAIX61 | Coated Digital Input Module

Product Description

8C-TAIX61 is a Series 8 digital input module from Honeywell designed for dependable discrete-signal acquisition in process control systems. Built for field durability and serviceability, the module supports fast scanning, galvanic isolation and hot-swap maintenance to minimize downtime. The specification set below follows standard Series 8 digital-input conventions and is suitable for integration into I/O racks using compatible IOTA carriers.

Key Features

• Model: 8C-TAIX61
• Function: Digital input acquisition for discrete 24 VDC signals
• Channels: 32-channel density (single-ended or differential I/O via IOTA)
• Scan Modes: Normal and fast PV scan with low-latency option for time-critical monitoring
• Isolation: System-to-field galvanic isolation for improved noise immunity and safety
• Diagnostics: On-board integrity checks and status indicators for channel health
• Serviceability: Hot-swap capable (module removal/insertion under power)
• Environmental: Conformal coating option for corrosive or humid environments

Technical Specifications

• Input Voltage Rating: 24 VDC nominal
• Operating Range: 18–30 VDC
• Module Current Draw: ~95 mA (typical for 32-channel digital input modules)
• Input Sense Thresholds: ON sense ≥13 VDC or ≥3 mA; OFF sense ≤5 VDC or ≤1.2 mA
• Input Impedance: ~4.2 kΩ
• Scan Rate (PV): Normal ~20 ms; Fast/Low-latency option available (typical 5 ms)
• SOE Resolution (if SOE enabled): 1 ms time-tagging capability (module-dependent)
• Isolation Rating: 1000 VAC RMS (system-to-field) or ±1000 VDC equivalent
• Input Protection: Field resistance limits for guaranteed ON/OFF conditions; withstands ±30 V without damage
• Filter/Delay: Input filtering and isolation delay consistent with Series 8 digital I/O (typical filter delay ~5 ms ±20%)
• Cabling/Field Power: Supports internal or external field power selection; on-board excitation where applicable
• Operating Temperature: 0 °C to +60 °C (typical industrial range)
• Mechanical: Coated PCB option for harsh environments; compatible with standard 9”/12” IOTA carriers depending on I/O rack configuration

Applications

• Discrete input monitoring in power plants, petrochemical and utility control systems
• Safety and interlock signal collection where isolation and fast event detection are required
• Retrofit or new Series 8 I/O installations requiring high channel density and hot-swap capability

FAQ

• Q: How many inputs does the 8C-TAIX61 support? A: Designed for 32 discrete input channels (configured via the appropriate IOTA carrier).
• Q: Can it be serviced while the rack is powered? A: Yes — the module supports hot-swap removal and insertion.
• Q: Is galvanic isolation provided? A: Yes — system-to-field galvanic isolation is implemented to protect controller electronics and improve noise immunity.
• Q: Does it support Sequence of Events (SOE)? A: SOE time-tagging to 1 ms is supported on Series 8 digital input modules when SOE mode is enabled; confirm SOE configuration for your system.