Description
The Honeywell FC-SDI-1624 is a 16-channel safe digital input module engineered for safety-instrumented systems (SIS) and high-integrity process automation environments. It interfaces field-level safety sensors, emergency shutdown contacts, and interlock loops directly into fault-tolerant control architectures, complying with stringent functional safety requirements up to SIL 3.
Procurement and Availability
- Availability: In stock for immediate dispatch through specialized automation surplus and industrial channels
- Standard Lead Time: 3 to 5 business days for domestic delivery; 7 to 10 business days for international freight
- Warranty: 12-month standard replacement warranty from invoice date
- Condition: Factory Sealed / New Surplus or Refurbished Tested (verify preferred condition with supplier)
- Pricing Notice: Listed price is indicative and subject to market conditions. Contact our sales desk for a firm quotation and project volume pricing.
Technical Specifications
| Parameter | Value |
| Manufacturer | Honeywell |
| Product Model / Number | FC-SDI-1624 |
| Product Type | Safe Digital Input Module |
| Number of Input Channels | 16 channels, short-circuit proof |
| Nominal Input Voltage | 24 V DC (solid-state format) |
| Input Signal Range (HIGH) | > 15 V DC |
| Input Signal Range (LOW) | < 9 V DC (I < 2 mA) |
| Input Current | Approximately 7 mA per channel at 24 V DC |
| Internal Power Consumption | 8 mA (5 V DC bus); 110 mA (24 V DC bus) |
| Response / Input Delay | Typically 10 ms |
| Safety Integrity Level | Certified up to IEC 61508 SIL 3 |
| Form Factor / Dimensions | Standard 3U eurocard size (4 HP wide rack-mount module) |
| Operating Temperature | -20 to +60°C |
| Storage Temperature | -40 to +85°C |
| Relative Humidity | 5 to 95% non-condensing |
| Certifications | CE, TÜV, UL, CSA, FM (verify specific revision data via OEM documentation) |
Engineering and Integration Context
When deploying or replacing the FC-SDI-1624 module in safety manager or fault-tolerant controller chassis, strict safety life-cycle and installation guidelines must be observed.
- Loop Testing and Fault Diagnostics: The module features internal diagnostics capable of detecting line faults, open circuits, and short-circuits on field wiring. During loop checks, verify that channel mapping in the safety engineering tool corresponds precisely with the physical termination blocks.
- Hot-Swap Procedures: Depending on the specific system rack configuration, safety controllers support module replacement under power, but technicians must follow plant-specific Permit-to-Work (PTW) protocols to avoid accidental safety trips during insertion or extraction.
- Shielding and Grounding: Ensure that signal cables running from field safety switches to the FC-SDI-1624 are properly shielded and grounded at one end to prevent electromagnetic interference (EMI) from inducing false high states on high-integrity inputs.
Frequently Asked Questions
Q: Can the FC-SDI-1624 be used in non-safety standard control racks?
A: While mechanically compatible with certain standard chassis backplanes, this module is specifically designated for safety-critical (SIS) loops. Installing it outside a validated safety architecture requires adherence to system-level safety design constraints.
Q: Does replacing a failed FC-SDI-1624 require re-downloading the safety configuration program?
A: Typically, configuration data and node addresses are handled via the system backplane or controller memory. However, always verify synchronization via the engineering workstation software suite after hot-swapping or replacing hardware modules.
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