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Product Description

High-Integrity Safe Digital Output Control

The Honeywell FC-SDO-0824 (also documented as FCSDO0824) is a high-reliability Safe Digital Output module designed for Honeywell’s Fail-Safe Control (FSC) and Safety Manager systems. This module is engineered to provide eight independent 24 VDC fail-safe outputs, making it a critical component for driving final elements such as solenoid valves, emergency shutdown (ESD) relays, and safety indicators. Its fundamental design principle is fail-to-safe, ensuring that in the event of a system failure, internal fault, or loss of communication, all outputs transition to a de-energized "safe" state.

Advanced Diagnostics and SIL 3 Compliance

Specifically developed for Safety Instrumented Systems (SIS), the FC-SDO-0824 is certified for use in SIL 3-capable loops according to IEC 61508. The module features comprehensive integrated diagnostics, including continuous line monitoring for open circuits and short circuits in the field wiring. It also incorporates a watchdog timer that monitors the module's internal health, effectively preventing "frozen" outputs. With a current capacity of up to 0.55A per channel (with some configurations supporting peaks up to 1A depending on thermal conditions), and a wide operating temperature range from –40 °C to +70 °C, it delivers consistent performance in the most demanding process environments, including offshore rigs and petrochemical refineries.

Technical Specifications Table

Feature Specification Details
Manufacturer Honeywell
Model Number FC-SDO-0824 / FCSDO0824
Series Fail-Safe Control (FSC) / Safety Manager
Module Type Safe Digital Output (DO)
Output Voltage 24 VDC
Number of Channels 8 independent channels
Output Current 0.55 A per channel (Nominal)
Safety Integrity Level SIL 3 Capable (IEC 61508)
Diagnostics Short circuit, open circuit, watchdog monitoring
Response Time Typically < 20 ms
Operating Temperature –40 °C to +70 °C
Isolation Channel-to-system and channel-to-channel
Power Supply 24 VDC via system backplane
Installation Rack-mounted (FSC/Safety Manager Chassis)
Shipping Weight 3.0 kg (6.6 lbs)

 

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