Description
Honeywell TC805C1018 16-Channel Analog Input Terminal Base
Product Dimensions:
The Honeywell 16-Channel Analog Input Terminal Base—commonly referred to in modern Honeywell architectures as an IOTA (Input Output Termination Assembly)—is a foundational component of the Experion® PKS (Process Knowledge System) Series C or Experion LX I/O families.
It serves as the physical and electrical interface between the field wiring (transmitters, sensors) and the plug-in 16-channel Analog Input electronic modules (such as the CC-PAIH01 or CC-PAIH02).
Product Detailed Description
The 16-channel Analog Input Terminal Base is a rugged, passive backplane designed to mount directly onto a standard DIN rail. Its primary function is to route 16 individual field signals into the active electronic I/O card. It contains the heavy-duty screw terminals for field wiring, fuse protection, and the multi-pin connector sockets where the electronic modules reside.
These terminal bases are available in Non-Redundant (holding one I/O module) and Redundant (holding two I/O modules in a hot-standby configuration) form factors.
Typical Technical Parameters
Specifications below are representative of the widely used CC-TAIH01 (Non-Redundant) and CC-TAIH11 (Redundant) Series C terminal bases.
| Parameter | Specification |
| Number of Channels | 16 Channels |
| Supported Module Types | Differential or Single-Ended Analog Input Cards (4–20 mA / HART) |
| Termination Type | Compression-type screw terminals or socket terminals |
| Wire Size Capacity | 0.3 mm² to 2.5 mm² (22 to 12 AWG) |
| Channel Protection | Individual per-channel current limiting or fuses |
| Voltage Rating | 24 V DC nominal |
| Dielectric Isolation | 1500 V AC between field channels and logic (module-dependent) |
| Mounting Orientation | Vertical or Horizontal on standard carrier channels |
Product Advantages
- Cabinet Space Efficiency: The compact, vertical shape of the Series C terminal base optimizes cabinet space, allowing for high-density terminal layout configurations.
- True Hot-Swapping: Because all field wires terminate directly onto this passive base, the active electronic I/O cards can be plugged in or replaced live (“hot-swapped”) without disconnecting a single wire or disrupting the loop.
- Robust Noise Immunity: Designed with dedicated ground planes and shielding provisions to shield sensitive analog and digital HART frequencies from external electromagnetic interference (EMI).
- Flexible Redundancy: The redundant terminal base variants allow seamless pairing of primary and backup cards, ensuring maximum system availability for critical safety or control loops.
Important Considerations & Precautions
- Torque Specifications: Always use the manufacturer-specified torque when tightening terminal screws to prevent wire damage or loose connections that lead to intermittent signal drops.
- Grounding Shield Loops: Ensure that field instrument cable shields are grounded at the terminal base end only, utilizing the dedicated grounding bars, to avoid creating corrupting ground loops.
- Fuse/Channel Rating: Do not exceed the maximum current rating per channel (typically 25–30 mA for standard 4–20 mA loops). Excess current can blow internal protection resistors or fuses on the board.
- Environmental Constraints: For highly corrosive or humid environments, ensure you order the Conformal Coated variant (often denoted by a “G3” rating) to prevent circuit board trace oxidation.
Product Applications
The Honeywell 16-Channel AI Terminal Base is utilized anywhere a Honeywell Experion DCS is deployed:
- Refining & Petrochemical: Connecting temperature, pressure, and level transmitters across entire processing units.
- Power Generation: Interfacing critical flowmeters and monitoring instrumentation for steam turbines and boilers.
- Pharmaceutical Manufacturing: Linking high-precision analytical sensors and mass flow transmitters into the validated control system.
- Upstream Oil & Gas: Serving as the termination point for remote wellhead or separation skid monitoring instruments.
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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