Honeywell 8C-TCNT01 51307032-175 Termination Assembly

Technical Overview

The Honeywell 8C-TCNT01 (part number 51307032-175) is a controller I/O termination assembly (IOTA) designed for the Experion Series 8 and C300 distributed control system . This module provides a reliable interface point for connecting field wiring to the C300 controller’s I/O modules . It supports both analog and digital signals, thereby simplifying cabinet wiring and reducing installation complexity .

The 8C-TCNT01 features a compact 6-inch IOTA design with a G3 conformal coating for enhanced protection against moisture, dust, and corrosive gases . This makes it well-suited for harsh industrial environments in chemical, oil and gas, and power generation facilities . The module supports redundancy by allowing connection to a secondary C300 Controller IOTA, thereby enhancing system fault tolerance .

Technical Specifications

Parameter	Specification
Manufacturer	Honeywell
Model Number	8C-TCNT01
Part Number	51307032-175
Product Type	C300 Controller I/O Termination Assembly (IOTA)
System Compatibility	Experion Series 8, C300 Controller, PlantCruise
I/O Signal Types	Analog and digital (supports 4-20mA, 0-10V, 24V DC)
I/O Capacity	Configurable (up to 32 points depending on assembly)
Supply Rating	0.311 A @ 24 V DC
Operating Voltage	24 V DC ±20% (18–32V DC)
Isolation Voltage	2500 V DC (channel-to-system, channel-to-power)
Protection Type	Short circuit and overvoltage protection
Dimensions	22 × 12 × 5.3 cm / 172 × 144 × 63 mm
Weight	0.22 kg to 0.8 kg
Mounting	Series 8 I/O rack, DIN rail or panel mount
Operating Temperature	0°C to +60°C (non-coated) / -40°C to +70°C (coated)
Storage Temperature	-40°C to +85°C
Coating	G3 conformal coating (8C) for corrosion resistance
Certifications	CE, UL, CSA, Class I Division 2, Zone 2, RoHS
Country of Origin	USA

Key Features

Integrated I/O Termination Architecture – The 8C-TCNT01 combines electronics and field terminations in a single assembly, eliminating the need for a separate chassis and simplifying installation .

G3 Conformal Coating Protection – The coated 8C variant provides robust protection against moisture, salt spray, and corrosive gases, ensuring reliable operation in demanding environments .

Redundancy-Ready Design – The module supports dual IOTA configurations for enhanced system uptime. A secondary C300 Controller IOTA connection allows automatic failover without external wiring .

Comprehensive Protection Circuits – Built-in short circuit and overvoltage protection safeguards both the module and field devices from fault conditions .

Hot-Swap Capability – Users can replace the module without powering down the system in redundant configurations, minimizing process interruption during maintenance .

Wide Signal Compatibility – The module supports both analog (4-20mA, 0-10V) and digital (24V DC) signals, providing flexibility for diverse field instrumentation .

Applications

The Honeywell 8C-TCNT01 51307032-175 excels in oil and gas refineries, chemical processing plants, power generation facilities, and pharmaceutical manufacturing. It provides reliable I/O signal termination for the C300 controller in Experion PKS-based distributed control systems.