Honeywell 51202971-212 I/O Termination Cable Assembly

Product Overview

Honeywell 51202971-212 is a factory-assembled I/O termination cable designed to interconnect Honeywell I/O interface modules with Field Termination Assemblies (FTAs). It is engineered specifically for Honeywell TDC3000 and Experion PKS control platforms, ensuring stable signal transfer and long-term operational reliability.

The “-212” designation identifies a finished cable length of 12 feet (approximately 3.6 meters). Delivered fully terminated and tested, this cable eliminates field wiring variability and supports consistent system performance in mission-critical control environments.

Design and Functional Characteristics

This cable assembly features a multi-core shielded construction combined with Honeywell-specific keyed connectors. The design minimizes electromagnetic interference while preventing incorrect mating during installation. Factory termination guarantees uniform electrical characteristics across installations and reduces commissioning time.

​Technical Specifications

Electrical Characteristics

• Rated voltage: up to 300 V, aligned with Honeywell I/O subsystem requirements
• Signal compatibility: low-level analog and digital I/O signals
• Conductor resistance: ≤ 20 Ω/km, dependent on conductor size
• Insulation resistance: ≥ 100 MΩ·km
• Shielding method: aluminum/polyester foil with dedicated drain wire
• Noise protection: continuous shielding for improved EMI and RFI immunity

Mechanical Construction

• Conductor material: stranded copper
• Conductor size: typically 22–24 AWG, depending on channel configuration
• Outer jacket material: industrial-grade PVC or LSZH, batch dependent
• Connector interface: Honeywell proprietary keyed connectors
• Jacket color: standard Honeywell gray
• Minimum bend radius: 10 times the overall cable diameter

Environmental Ratings

• Operating temperature range: –20 °C to +60 °C
• Storage temperature range: –40 °C to +80 °C
• Allowable humidity: 5% to 95%, non-condensing
• Flame resistance: UL-listed multi-conductor control cable, batch specific
• Industrial protection: full-length shielding with drain wire grounding

System Compatibility

Honeywell 51202971-212 is fully compatible with:

• Honeywell Experion PKS I/O systems
• Honeywell TDC3000 distributed control systems
• Original Honeywell Field Termination Assemblies and I/O modules

The cable is intended as a direct replacement or expansion component without the need for adapters or modification.

Typical Applications

• Refining and petrochemical process control
• Power generation and energy management systems
• Continuous chemical processing facilities
• High-density DCS control cabinets

Frequently Asked Questions

Q: Can this cable be re-terminated in the field? A: No. This is a factory-terminated assembly. Field re-termination may compromise shielding integrity and system compliance.

Q: Is this cable suitable for non-Honeywell systems? A: Electrical characteristics may be compatible, but the connectors are Honeywell-specific and intended only for supported systems.

Q: Are alternative cable lengths available? A: Yes. Other lengths are identified by different suffix codes within the same product family.