Description
Honeywell TK-IOLI01 | I/O Link Interface Module | PMIO Communication
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model | TK-IOLI01 |
| Alternate Part Number | 51403427-175 |
| Product Type | I/O Link Interface Module |
| Module Designation | IOLIM |
| Primary Interface | PMIO |
| System Architecture | Honeywell Series-A |
| Application | PMIO field I/O interface |
| Supply | 24 VDC |
| Maximum Documented Quantity | 2 modules in the applicable Series-A chassis configuration |
| Approx. Net Weight | 0.41–0.45 kg |
| Lifecycle | Legacy / discontinued |
Honeywell’s Series-A documentation explicitly identifies TK-IOLI01 as the IOLIM (I/O Link Module), interface for PMIO. The same documentation lists two TK-IOLI01 positions in the relevant Series-A chassis architecture.
Secondary hardware references associate the module with 24 VDC and identify 51403427-175 as an alternate part number. Some listings also give internal current-consumption figures, but these are not sufficiently clear in the Honeywell system documentation to use as primary procurement specifications.
Product Introduction
The Honeywell TK-IOLI01 is an I/O Link Interface Module (IOLIM) used to connect a Honeywell control system with the PMIO process I/O architecture. It provides the interface between the controller-side system and legacy PMIO I/O, making it an important communication component in installations where PMIO field hardware remains in service.
This is not an analog input, digital output, or general-purpose signal-conditioning module. Its job is at the I/O communication/interface level, so a replacement must be evaluated against the chassis architecture, PMIO configuration, I/O Link arrangement, and controller generation rather than simply matching the module’s physical dimensions.
TK-IOLI01
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
When a TK-IOLI01 develops a communication problem, multiple PMIO points can appear unavailable at the controller even though the individual field I/O modules are healthy. Troubleshooting should therefore separate an I/O Link/interface fault from a field-channel fault before replacing individual I/O modules.
Typical Applications
- Honeywell Series-A control systems using PMIO
- PMIO field I/O interface architectures
- Legacy Honeywell DCS installations
- Controller cabinets retaining existing PMIO investment
Technical Pitfalls to Avoid
- Do not classify TK- as a conventional I/O channel module.
Honeywell identifies it specifically as an IOLIM / I/O Link Module, with the function of interfacing to PMIO. It is therefore fundamentally different from the TC-IAH, TC-IDD, TC-IDA and other channel-level I/O modules. - Verify the PMIO architecture before substitution.
The module is tied to the PMIO I/O Link architecture. Replacing it with an unrelated Ethernet, PROFIBUS, or generic communication module is not an equivalent substitution. - Check the chassis configuration and module count.
Honeywell documentation lists two TK- modules in the applicable Series-A chassis configuration. If a redundant or dual-interface arrangement is installed, both module positions and their associated wiring should be checked during troubleshooting. - Do not rely on contradictory online electrical specifications.
Several reseller pages publish figures such as 220 VAC, 30 kHz, Modbus, or broad signal-processing functions for TK-. Those descriptions conflict with Honeywell’s identification of the device as an IOLIM for PMIO and should not be used for engineering decisions.
Related Products
- Honeywell TC- — Related non-coated I/O Link interface designation in the Series-A family; verify exact installed hardware before substitution.
- Honeywell TK-FTEB01 — Ethernet interface module used in the Series-A architecture; different communication function from TK-.
- Honeywell TC-CCN014 — Single-media CNI module for the Series-A architecture.
- Honeywell TC/TK-CCR014 — Dual-media CNI module; different network-interface function.
- Honeywell TC-IAH161 — 16-point analog input module, 4–20 mA/10 V, non-isolated.
- Honeywell TK-IAH161 — Coated 16-point analog input module.
- Honeywell TC-IDD161 — 16-point 24 VDC digital input module.
- Honeywell TK-IDD321 — Coated 32-point 24 VDC digital input module.
- Honeywell TC-FXX172 — 17-slot Series-A chassis.
- Honeywell TK-FXX132 — Coated 13-slot Series-A chassis.
Procurement Check
Before approving a Honeywell TK- replacement, verify:
- Exact designation:
- Alternate/order number: 51403427-175
- Honeywell Series-A architecture
- PMIO system compatibility
- I/O Link configuration
- Number of installed IOLIM modules
- Chassis model
- Controller generation
- Module hardware revision
- 24 VDC supply arrangement
- I/O Link cabling and connectors
- PMIO rack/node configuration
- Existing redundancy arrangement, if applicable
- Nameplate and installed system documentation
Recommended procurement description:
Honeywell TK- IOLIM I/O Link Interface Module, 51403427-175, Series-A PMIO Interface, 24 VDC, Honeywell DCS Legacy I/O Communication Module.
The key point is that TK- is an I/O Link interface for PMIO, not a field signal I/O card. For replacement work, the PMIO architecture, Series-A chassis configuration, I/O Link wiring, module revision, and any dual-module arrangement should be matched before installation.
