Honeywell FC-TSDI-1624 16-Channel Safe Digital Input Module SIL 3

Product Description

Overview

The Honeywell FC-TSDI-1624 is a high-reliability digital input module engineered for safety-critical applications within the Honeywell Safety Manager system. Designed to interface seamlessly between field sensors and the Fail-Safe Controller, this module ensures accurate signal transmission while maintaining the highest safety standards. It supports SIL 3 operation and is optimized for Emergency Shutdown (ESD), Fire and Gas (F&G), and hazardous process monitoring.

Key Features

High-Integrity Input Channels

• 16 fully isolated digital input channels

• Accepts 24 VDC nominal signals with a functional range of 18–30 VDC

• Low input current (nominal 2–7 mA per channel) for efficient energy usage

Fast and Reliable Response

• Signal processing time ≤ 25 ms

• Ideal for applications requiring immediate feedback from critical field devices

Advanced Self-Diagnostics

• Continuous internal testing verifies input logic and wiring integrity

• Detects open circuits, shorts, and abnormal signal conditions

• Front-panel LEDs provide visual indication for each channel and module status

Fail-Safe and Redundancy

• Compatible with 1oo2 voting configurations for enhanced availability

• Supports hot-swapping in redundant setups to minimize system downtime

Robust Industrial Design

• IP65-rated enclosure for protection against dust and water ingress

• Operating temperature: -40°C to +70°C (-40°F to 158°F)

• Galvanic isolation prevents field-side surges from affecting system bus

• Compact, space-saving design for high-density cabinet installation

Technical Specifications Table

Applications

The FC-TSDI-1624 is suited for critical safety loops including:

• Emergency Shutdown Systems (ESD): Monitors safety interlocks and triggers process shutdowns.

• Fire Alarm Systems: Interfaces with detectors to initiate alarms or suppression actions.

• Gas Detection Systems: Continuously monitors gas levels and activates safety protocols when thresholds are exceeded.

FAQ

Q: Can this module operate in SIL 3 rated loops?
A: Yes, individually SIL 3 certified and supports 1oo2 redundancy for higher availability.

Q: How are field wiring issues detected?
A: The module monitors open circuits, shorts, and cross-channel faults via internal diagnostics when paired with the correct Field Termination Assembly.

Q: Is hot-swapping supported?
A: Hot-swapping is possible in redundant configurations, allowing replacement without interrupting safety operation.

Q: What types of devices can be connected?
A: Push buttons, pressure switches, gas detectors, and other 24 VDC safety sensors.