Honeywell SDI-1624 Safety Manager Safe Digital Input Module

Only 3 item(s) left in stock

Manufacturer: Honeywell
Product No.: SDI-1624
Country of origin:United States
Product Type: Safety PLC Input Modules
Payment: T/T, Western Union
Weight: 3000g
Shipping port: Xiamen
Warranty: 12 months

Description

Integrating seamlessly into Safety Manager and Fail Safe Control (FSC) architectures, the Honeywell SDI-1624 serves as a high-integrity safe digital input interface designed for safety-critical industrial processes. This solid-state module processes up to 16 isolated safe input channels, converting field signals into dual-channel diagnostic data for the safety controller. Engineered with a robust 3U Eurocard form factor, the SDI-1624 provides continuous self-testing, short-circuit protection, and precise signal filtering to prevent spurious trips in demanding industrial settings.

Features

16 Safe Input Channels: High-density, isolated digital inputs operating at nominal 24 Vdc.
Comprehensive Self-Diagnostics: Integrated circuitry continuously monitors channel status, input delays, and internal rail voltages.
Short-Circuit Proof: Solid-state, current-limiting design protects internal logic from field wiring faults.
Low Signal Propagation Delay: Input transition delay is typically restricted to 10 ms for rapid emergency response.
Robust Environmental Compliance: Certified for use in SIL-rated safety instrumented systems under CE, TUV, UL, CSA, and FM standards.

Applications

Emergency Shutdown (ESD) Systems in petrochemical and refining facilities.
Burner Management Systems (BMS) for utility and industrial boilers.
Fire and Gas (F&G) monitoring networks.
High-Integrity Pressure Protection Systems (HIPPS).

Technical Specifications

Parameter	Specification
Manufacturer	Honeywell
Model Number	SDI-1624
Module Type	Safe Digital Input Module (Solid State)
Number of Channels	16
Physical Dimensions	4 HP (TE) Width, 3U (HE) Height
Logic Power Consumption	5 Vdc, 8 mA
Internal 24 Vdc Power	24 Vdc, 110 mA
External 24 Vdc Power	24 Vdc, 110 mA (input currents)
Maximum Input Voltage	36 Vdc
Nominal Input Current	7 mA at 24 Vdc
Input Threshold - HIGH	> 15 Vdc
Input Threshold - LOW	< 9 Vdc (Current < 2 mA)
Input Signal Delay	Typically 10 ms
Maximum Loop Current	450 mA
Max. Load Capacitance	32 uF
Voltage Drop	< 1.5 V at 450 mA
Ripple Limit (5 Vdc Rail)	< 0.5 Vp-p (0 to 360 Hz)
Certifications / Approvals	CE, TUV, UL, CSA, FM
Shipping Weight	3.0 kg (6.6 lbs)

Empirical Engineering Insights

Alternative Models & Compatibility

The SDI-1624 is a standardized safe input card for Honeywell FSC and Safety Manager backplanes. When migrating from older system revisions, confirm that the installed Field Termination Assembly (FTA) and cable routing are fully pin-compatible. This module directly replaces legacy safety digital inputs within the same system family, but safety parameter re-validation is recommended post-replacement.

Application Pitfalls & Engineering Notes

Keep the total field cabling capacitance below 32 uF. Exceeding this limit will distort the pulse-testing diagnostics generated by the safety processor, resulting in false channel faults or card mismatches. Ensure the 24 Vdc power supply feeding the field loops does not exhibit noise levels exceeding 0.5 Vp-p to prevent diagnostics from flagging signal instability.

Commissioning & Wiring Tips

Always route the 24 Vdc external supply and logic signals in separate shielded conduits to minimize electromagnetic interference (EMI). Ensure that the reference ground for the external 24 Vdc supply is bonded to the Safety Manager system common ground at a single, low-impedance point to prevent ground loops that could cause diagnostic errors.

Installation Guidelines

CRITICAL WARNING: De-energize all field power loops and logic rack supplies before inserting or extracting the SDI-1624. Failure to fully discharge external loops can result in permanent diagnostic logic damage or unexpected safety system trips.

Inspect the backplane connector pins on the card rack to ensure they are clean, dry, and free of physical debris.

Align the module with the upper and lower card guide rails of the 3U subrack.

Slide the module backward steadily until the DIN connector fully mates with the rack backplane. Avoid forcing the module if resistance is encountered.

Secure both front panel retaining screws to guarantee mechanical stability and continuous chassis grounding.

Key Features:

What is the maximum allowed input voltage for the SDI-1624 module?

The module is designed to withstand a maximum input voltage of 36 Vdc, with a nominal operating input current of 7 mA at 24 Vdc.

What are the logic thresholds for HIGH and LOW states?

An input is recognized as logic HIGH when voltage is greater than 15 Vdc. It registers as logic LOW when the voltage drops below 9 Vdc and input current falls under 2 mA.

Does this module support continuous internal diagnostic checks?

Yes, the SDI-1624 provides comprehensive self-diagnostics, continuously monitoring logic levels, internal power rails, and loop current behavior to identify field wiring faults.

What is the maximum limit for cable load capacitance?

The maximum load capacitance is limited to 32 uF. Exceeding this can interfere with the safety diagnostics and signal transition accuracy of the module.

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin

Technical knowledge

$Math Operations Using OpenPLC for Industrial Automation Applications$

Honeywell SDI-1624 Safety Manager Safe Digital Input Module