The Honeywell MC-TDIY22 (51204160-175) is a specialized printed circuit board (PCB) designed for digital input field termination within Honeywell industrial control systems. This component serves as a critical interface for managing 24Vdc digital input signals, providing a reliable connection point for field wiring to the control system architecture. Although marked as discontinued by the manufacturer, this unit remains a vital spare for legacy system maintenance and infrastructure support.
This field termination board is primarily utilized in Honeywell distributed control systems (DCS) and associated input/output subsystems. It is commonly deployed in process control environments where high-density digital signal termination is required for monitoring sensors, switches, and other binary field devices.
| Manufacturer | Honeywell |
| Model Number | MC-TDIY22 |
| Part Number | 51204160-175 |
| Signal Type | Digital Input (24Vdc) |
| Component Type | Field Termination PC Board |
Is the MC-TDIY22 still manufactured?
No, this model has been discontinued by Honeywell. We provide these units as surplus or refurbished spare parts for ongoing maintenance.
What is the primary function of this board?
This board acts as a terminal interface, allowing field-side 24Vdc digital signals to be connected safely and efficiently to the main control system I/O modules.
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