Honeywell FC-TSDI-1624C Digital Input Module

High-Density Digital Input Acquisition

The FC-TSDI-1624C delivers 16 independent digital input channels for the Honeywell Safety Manager system. This module accepts 24 VDC nominal signals from field devices like switches, pushbuttons, and proximity sensors. A wide operating range of 10.5–30 VDC ensures reliable performance even during supply voltage fluctuations. The module provides the controller with isolated dry contact or voltage-sourced inputs. Therefore, it serves as the backbone for discrete logic operations and safety interlock systems.

Advanced Circuit Protection and Diagnostics

Each input channel incorporates an active current-limiting circuit for robust protection against overload and short circuits. This design prevents a single faulty input from disrupting the entire module’s operation. Additionally, the FC-TSDI-1624C features integrated hardware input filtering to reject electrical noise and contact bounce. This filtering mechanism ensures stable state detection in noisy plant environments. Onboard LED indicators display the status of each channel and the overall module health. Consequently, maintenance technicians can quickly identify field wiring issues without needing external test equipment.

Intelligent Self-Diagnostics and System Integration

The module performs continuous self-monitoring of the input multiplexing hardware to guarantee output data accuracy. It also executes a second reading of the multiplexer for each channel to validate the state . This dual-read approach significantly enhances fault detection capabilities. The module reports diagnostic data through the backplane interface, allowing the host controller to recognize channel health. Furthermore, the FC-TSDI-1624C supports both modular and physical addressing for flexible system configuration.

Technical Specifications