The Honeywell FC-SDOL-0424 (V1.2) is a specialized Safe Digital Output Loop Monitored (LM) module engineered for the Honeywell Fail-Safe Control (FSC) system. This module is a critical component for Safety Instrumented Systems (SIS), providing four independent, high-reliability 24V DC channels designed to drive safety-critical final elements such as solenoid valves, ESD relays, and actuators. With a focus on fail-safe operation, the FC-SDOL-0424 ensures that outputs transition to a predetermined safe state (normally de-energized) in the event of a fault or system logic command, meeting the rigorous requirements of SIL 3 applications.
A standout feature of the FC-SDOL-0424 is its sophisticated diagnostic capability. It provides continuous monitoring of the field loop, including detection for short circuits, lead breakage, and suppression diode health. The module is short-circuit proof with a maximum channel current of 1A, while the total module load is thermally limited to 3.6A to prevent internal dissipation issues. Its robust hardware design handles high load inductance (up to 0.5 H) and incorporates a watchdog (WDG) input to monitor internal processor health, ensuring that the module only executes commands when the system integrity is fully verified.
| Specification | Details |
| Manufacturer | Honeywell |
| Model Number | FC-SDOL-0424 |
| Hardware Version | V1.2 |
| Number of Channels | 4 Output Channels |
| Output Type | 24 VDC Solid-State Source (Sinking/Source) |
| Max. Current per Channel | 1 A |
| Max. Total Module Load | 3.6 A (thermal limit) |
| Internal Power (5 Vdc) | 15 mA |
| Internal Power (24 Vdc) | 50 mA |
| External Power (24 Vdc) | 15 mA (no load) |
| Max. Load Inductance | 0.5 H |
| Max. Load Capacitance | 1 μF |
| Voltage Drop | < 1.3 V at 1 A |
| Safety Compliance | SIL 3 Capable (IEC 61508) |
| Dimensions | 4 HP, 3U (4 TE, 3 HE) |
| Isolation Voltage | 500 V AC |
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