Honeywell FC-SDOL-0424 Digital Output Module

Certified Fail-Safe Output Control

The FC-SDOL-0424 provides 4 high-current fail-safe digital output channels for the Honeywell Safety Manager platform. This module complies with SIL 3 and IEC 61508 standards for critical safety applications. It delivers 24 VDC nominal outputs with a continuous current rating of 2 A per channel . Consequently, the module directly drives solenoids, contactors, and indicator lamps in emergency shutdown systems.

Redundant Output Architecture for Reliability

Each output on the FC-SDOL-0424 utilizes a dual-power switch configuration for safe disconnection. This redundant architecture ensures the output transitions to the de-energized state upon any internal fault detection . The module performs comprehensive diagnostics including output voltage monitoring, current limiting, and over-temperature protection . Moreover, it actively tests each output channel for short circuits and open loads during normal operation . The module also supports line monitoring using a field-side termination assembly (FTA) for enhanced fault coverage.

Load Management and Protection Features

The FC-SDOL-0424 incorporates active current limiting to protect against overcurrent conditions on each output. A built-in clamping diode suppresses inductive voltage spikes generated by solenoids and relays . The module supplies status feedback through LED indicators and backplane communication. It also provides field power input monitoring to detect undervoltage conditions . The module’s robust design allows high inrush current handling for capacitive loads.

Technical Specifications