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Technical Overview
The Honeywell CC-TDI220, identified by part number 51308394-275, is a high-voltage digital input module for the Experion PKS distributed control system. This unit acquires discrete signals from field devices and transmits them to the C300 controller for process monitoring and control logic execution. It supports two distinct variants: a 16-channel high-voltage AC model and a 32-channel DC model for different application requirements .
The 16-channel high-voltage AC variant accepts 180-264 VAC signals, making it suitable for direct connection to standard industrial switchgear. The 32-channel DC variant accepts 24-48 VDC nominal signals with robust isolation against electrical noise and ground loops . Both versions feature optical isolation that protects the controller backplane from field-side transients and voltage spikes.
The module mounts onto a Series C Input/Output Termination Assembly (IOTA) baseplate, which provides mechanical support and electrical connections. Hot-swap capability allows module replacement without shutting down the control system, minimizing process disruption .
Technical Specifications
| Parameter | 16-Channel AC Variant | 32-Channel DC Variant |
|---|---|---|
| Manufacturer | Honeywell | Honeywell |
| Model Number | CC-TDI220 51308394-275 | CC-TDI220 51308394-275 |
| Input Channels | 16 | 32 |
| Nominal Voltage | 240 VAC | 24-48 VDC |
| Input Range | 180-264 VAC RMS | 24-48 VDC nominal |
| Sense Current (ON) | ≥1.11 mA RMS | — |
| Sense Current (OFF) | ≤0.32 mA RMS | — |
| Frequency | 47-63 Hz | — |
| Isolation | 1500 VAC RMS | 1500 VDC |
| Response Time | ≤25 ms maximum | ≤5 ms typical |
| Operating Temperature | -40°C to +70°C | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C | -40°C to +85°C |
| Weight | 0.65 kg | 0.45 kg |
| Certifications | CE, UL, CSA, ATEX | CE, UL, CSA, ATEX |
Key Features
Comprehensive Channel Isolation – The module provides 1500V isolation between input channels and the control logic, effectively eliminating ground loops and protecting the system from voltage transients .
Hot-Swap Capability – Users can replace the module during operation without powering down the system, thereby reducing downtime during maintenance procedures .
Built-in Diagnostic Functions – The module performs continuous self-diagnostics on each channel and reports open circuits, short circuits, and overvoltage conditions to the Experion PKS operator station .
High-Density Channel Architecture – The 32-channel configuration maximizes cabinet space efficiency and lowers overall installation costs .
Conformal Coating Protection – The ruggedized construction with conformal coating ensures reliable operation in harsh industrial environments with moisture and corrosive gases .
Applications
The Honeywell CC-TDI220 excels in oil and gas refineries, chemical processing plants, power generation facilities, and pharmaceutical manufacturing environments. It is ideal for monitoring valve positions, pump status, emergency shutdown systems, limit switches, and proximity sensors in Experion PKS-based control systems .