Honeywell TC-IOLI01 51403427-125 I/O Link Interface Input Module

Product Description

The TC-IOLI01 (51403427-125) is a specialized digital input interface designed for Honeywell’s legacy I/O Link architectures. This module functions as a critical bridge within the process control environment, allowing high-voltage AC field signals to be interpreted by the low-voltage DC logic of the controller backplane. Engineered for the Experion PKS and High-Performance Process Manager (HPM) systems, it provides precise monitoring of discrete field states while ensuring electrical isolation to protect core system hardware from industrial transients.

Technical Specifications

• Model Identification: TC-IOLI01

• Associated Part Number: 51403427-125

• Primary Function: Digital Input / I/O Link Interface

• Nominal Input Voltage: 120 VAC

• Frequency Compatibility: 50/60 Hz

• Input Current Rating: 13 mA (typical)

• Backplane Logic Power: 24 VDC

• Form Factor: Chassis-mounted PLC Module

• Net Weight: 0.45 kg (approx. 1.00 lbs)

• Lifecycle Status: Discontinued by Manufacturer (Legacy Spares Support)

Operational Reliability and Utility

The TC-IOLI01 (51403427-125) is typically deployed in aging process control networks where 120 VAC discrete devices—such as limit switches, motor auxiliary contacts, and pushbutton stations—must be integrated into the control strategy. Despite its "Discontinued" status, it remains a vital component for engineers maintaining critical infrastructure, offering a far more cost-effective alternative to full system migrations. Its robust 1.00 lb construction is indicative of the heavy-duty shielding and isolation transformers required for stable 120V signal processing in noisy electrical environments.

Frequently Asked Questions

• Can this module be used with 240 VAC inputs?

  No, the TC-IOLI01 is specifically rated for 120 VAC nominal input. Applying higher voltages will lead to internal component failure and potential backplane damage.

• Is the 51403427-125 part number interchangeable with the TC-IOLI01?

  Yes, 51403427-125 is the official Honeywell manufacturing part number for the TC-IOLI01 module assembly, and they are functionally identical for all I/O Link applications.