Description
Honeywell 51202329-606 | I/O Link Gray Header Cable Pair | Series C I/O Network
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Part Number | 51202329-606 |
| Product Type | I/O Link Gray Header Cable Pair |
| System | Honeywell Series C |
| I/O Link | I/O Link 1 (IOL1) |
| Configuration | 3-drop daisy-chain |
| Cable A | 51202329-604, gray header cable, yellow label |
| Cable B | 51202329-605, gray header cable, green label |
| Quantity | One cable A + one cable B |
| Function | I/O Link network/cabinet interconnection |
| Cable Arrangement | Daisy-chain |
| Typical Use | Series C I/O cabinet wiring |
Honeywell’s Series C hardware planning documentation explicitly defines 51202329-604 as the yellow-label 3-drop daisy-chain cable, 51202329-605 as the corresponding green-label cable, and 51202329-606 as the pair consisting of one of each.
Product Introduction
The Honeywell 51202329-606 is a Series C I/O Link gray header cable pair used to establish the I/O Link connection between compatible Honeywell Series C control hardware. It is a wiring assembly rather than an electronic I/O module, processor, or controller. Honeywell’s documentation places the part within the Series C I/O Link cable family used for cabinet-level system wiring.
The 51202329-606 package is specifically a matched pair: cable 51202329-604 with the yellow label and cable 51202329-605 with the green label. Both are three-drop daisy-chain header cables, so the pair should be treated as a system-specific interconnection assembly rather than substituted with a generic communication cable.

51202329-606
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
A cable failure in the I/O Link path can present as multiple I/O communication or cabinet-level faults, making the problem look like a controller or I/O module failure. Correct cable identification is therefore important before replacing electronic hardware.
Typical Applications
- Honeywell Series C I/O cabinet wiring
- Experion control system I/O Link connections
- Three-drop daisy-chain I/O Link arrangements
- Replacement of damaged or aging Series C header cables
Technical Pitfalls to Avoid
- Do not treat 51202329-606 as an electronic module.
It is a cable pair. Listings that describe this part as a controller, PLC module, or analog/digital I/O card are inconsistent with Honeywell’s Series C documentation. - Verify both cable colors and part numbers.
The assembly consists of 51202329-604 yellow-label and 51202329-605 green-label cables. Ordering only one cable does not reproduce the documented 51202329-606 pair. - Check IOL1 versus IOL2 architecture.
Honeywell’s Series C documentation distinguishes I/O Link 1 and I/O Link 2 cable families. The 51202329-606 belongs to the IOL1 family, so it should not be assumed interchangeable with similarly numbered IOL2 assemblies. - Do not rely on generic connector descriptions.
The physical header arrangement and drop configuration are part of the system design. Confirm the cabinet drawing and cable routing before substituting another Series C cable assembly.
Related Products
- 51202329-604 — Yellow-label gray header cable, 3-drop daisy-chain, cable A.
- 51202329-605 — Green-label gray header cable, 3-drop daisy-chain, cable B.
- 51202329-602 — IOL1 gray header cable pair for a different 3-drop configuration.
- 51202329-502 — IOL1 gray header cable pair with 6-drop configuration.
- 51202329-302 — Gray drop cable pair for a specific Series C channel arrangement.
- 51202329-402 — Gray 3-drop cable pair with 12-inch pitch.
- 51202329-202 — Gray 4-drop cable pair with 9-inch pitch.
- 51202329-612 — Related Series C I/O Link cable assembly in the same broader cable family.
Procurement & Replacement Check
Before purchasing a Honeywell 51202329-606, verify:
- Exact part number: 51202329-606
- Honeywell Series C compatibility
- I/O Link 1 / IOL1 application
- Three-drop daisy-chain configuration
- Yellow-label cable 51202329-604
- Green-label cable 51202329-605
- Existing cabinet wiring diagram
- Header and drop locations
- Cable routing and physical length
- I/O Link architecture
- Whether the existing installation uses or IOL2
Recommended procurement description:
Honeywell 51202329-606 Series C I/O Link Gray Header Cable Pair, 3-Drop Daisy-Chain Configuration, Includes 51202329-604 Yellow-Label Cable A and 51202329-605 Green-Label Cable B.
Important identification note: The strongest available Honeywell documentation identifies 51202329-606 as a cable pair, not a controller or I/O module. This distinction is important because several third-party listings incorrectly categorize the same number as a module. For procurement, the Honeywell Series C hardware configuration should take precedence.
