FC-SDI-1624 Safety Digital Input (SDI) Module
The FC-SDI-1624 is a highly reliable Safety Digital Input (SDI) Module engineered by Honeywell for deployment in safety-instrumented systems (SIS). It is a key component within the Honeywell Safety Manager and Experion® PKS C300/C500 control platforms, specifically designed to acquire discrete on/off signals from field devices in safety-critical applications.
This module provides 16 channels of isolated 24 VDC digital inputs, built to meet strict international safety standards. It features robust galvanic isolation, comprehensive onboard diagnostics for fault detection (including open circuit and short circuit), and per-channel status indication. Engineered for uncompromising performance, it ensures the accurate, safe, and rapid monitoring of field signals, which is essential for emergency shutdown (ESD) and process interlock systems.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | FC-SDI-1624 |
| Module Type | Safety Digital Input Module |
| System Compatibility | Honeywell Safety Manager, Experion PKS (C300/C500) |
| Number of Channels | 16, fully isolated |
| Input Signal | 24 VDC discrete (dry/wet contact, NPN/PNP) |
| Input Voltage Range | 18 – 32 VDC (Nominal: 24 VDC) |
| Logic Thresholds | Logic High: > 15 VDC; Logic Low: < 9 VDC |
| Input Current | 7 mA per channel @ 24 VDC |
| Input Delay / Response Time | Typically 10 ms |
| Isolation Voltage | 2500 VAC (field-to-logic, 1-minute test) |
| Short-Circuit Protection | 450 mA current limit per channel (self-resetting) |
| Safety Certification | IEC 61508 SIL 3, IEC 61511 |
| Power Requirements | 5 VDC (logic) + 24 VDC (field) |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 10 – 95% non-condensing |
| Mounting | Rack-mounted (Safety Manager / Experion PKS racks) |
| Certifications | CE, UL, CSA, TÜV, FM |
| Key Features | Per-channel LED status, open/short circuit diagnostics, hot-swappable |
Primary Applications
- Oil & Gas: Offshore platforms, refineries, and pipelines for Emergency Shutdown (ESD) systems, fire & gas (F&G) detection, and wellhead isolation.
- Petrochemical & Chemical: Reactor protection systems, burner management, and critical process interlocks.
- Power Generation: Turbine protection, boiler safety systems, and nuclear plant auxiliary safety loops.
- Metals & Mining: Furnace control and conveyor safety interlock systems.
- Pharmaceuticals: High-purity process monitoring and regulatory-compliant safety functions.
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