Description

FC‑SDI‑1624 Safe Digital Input Module

Technical Specifications

• Product Model: FC‑SDI‑1624
• Brand: Honeywell
• Warranty: One Year
• Input Voltage: 24 VDC nominal, 18‑30 VDC operating range
• Operating Temperature: -40 °C to +70 °C
• Storage Temperature: -40 °C to +85 °C
• Response Time: ≤10 ms configurable input scan
• Protection Class: IP20 (rack‑mount cabinet‑only unit)
• Accuracy Class: SIL‑capable discrete safety‑input processing
• Output Frequency: Not applicable (digital input module)
• Rated Current Range: 7 mA typical per input channel; 450 mA max backplane draw
• Communication Interface: System backplane connector; mates with corresponding FTA termination assemblies
• Supported Protocols: Honeywell Safety Manager internal safety bus
• Overload Capacity: Channel‑level short‑circuit detection; 3 kV AC field‑to‑logic isolation
• Dimensions: 86 mm × 120 mm × 28 mm
• 

Product Overview

The FC‑SDI‑1624 is a 16‑channel safe digital input processing module for Honeywell Safety Manager SIS platforms. It acquires discrete status signals from field safety devices including emergency‑stop contacts, limit switches, flame detectors and dry‑contact interlock sensors, performing continuous on‑board diagnostics for wiring faults. Each channel provides galvanic isolation to prevent cross‑channel fault propagation, while built‑in line monitoring identifies open‑circuit and short‑circuit field‑wiring conditions and reports faults to the safety logic solver.

This module resolves core safety‑system challenges: high‑density safe signal acquisition, fault containment across multiple input loops, and compliance with IEC 61508 safety‑instrumented‑function requirements. Configurable input filtering suppresses transient electrical noise common in heavy‑industry cabinet environments, reducing nuisance trips. SIS integrators, refinery and petrochemical maintenance teams, and power‑plant safety‑retrofit engineers benefit most. It installs into standard Safety Manager rack slots, supports simplex and TMR redundant architectures, and works with matched field‑termination assemblies to simplify field‑wiring implementation for ESD and fire‑gas protection systems. (Word count:178)

Key Application Notes

• Requires compatible FTA field‑termination assembly for field‑wiring connection; cannot directly terminate field cables
• Supports both dry‑contact and 24 VDC active‑sensor input types
• Certified TUV, UL, CSA and FM, suitable for SIL‑3 safety‑instrumented loops
• Field‑side over‑voltage and short‑circuit events do not damage module backplane logic circuits
• Designed for control‑room safe‑area rack installation; can interface to Division 2 hazardous‑area field sensors via approved wiring practices