FC-SDI-1624 16-Channel Safety DI Module Honeywell

Product Introduction

The FC-SDI-1624 is a safe digital input module within the Honeywell Safety Manager platform. This module acquires discrete 24VDC field signals across 16 independent channels. Specifically, it serves safety instrumented functions such as emergency shutdown permissives and critical interlock monitoring.

Furthermore, the module carries SIL 3 certification under IEC 61508, which makes it suitable for high-integrity safety loops. Additionally, the FC prefix indicates conformal coating, protecting the hardware in demanding industrial environments. Besides, the module supports hot-swap replacement in redundant configurations without interrupting the safety process.

Technical Specifications

The Honeywell FC-SDI-1624 provides 16 digital input channels with nominal 24 VDC operation. It accepts a maximum input voltage of 36 VDC. The input current draws approximately 7 mA at 24VDC.

Key electrical parameters include:

• Input Channels: 16

• Nominal Input Voltage: 24 VDC

• Maximum Input Voltage: 36 VDC

• Input Current: 7 mA at 24 VDC

• HIGH State Threshold: > 15 VDC

• LOW State Threshold: < 9 VDC (input current < 2 mA)

• Input Delay: Typically 10 ms

• Supply Current: 5 VDC at 8 mA; 24 VDC at 110 mA

• Module Size: 4 TE, 3 HE (4 HP, 3U)

Furthermore, the module achieves SIL 3 safety integrity for critical applications. Each channel supports diagnostic monitoring for fault conditions. Moreover, the design includes key coding to prevent incorrect module insertion.

Diagnostic and Safety Features

The FC-SDI-1624 includes comprehensive self-test functions that verify logic circuitry integrity. Additionally, the module detects open circuits and short circuits when used with appropriate end-of-line resistors. Therefore, maintenance personnel can locate faults quickly at the channel level.

Besides, the module employs a fail-to-safe input stage. Specifically, it de-energizes signals during component failure to maintain safe system behavior. Moreover, crosstalk detection between inputs helps preserve signal accuracy in dense installations.

Installation Guide

First, verify that the Safety Manager chassis is powered down before inserting the module. Next, align the FC-SDI-1624 with the designated slot and confirm key coding engagement. After that, seat the module firmly into the backplane connector.

For field wiring, connect 24VDC discrete signals to the assigned terminals. Additionally, separate digital signal wiring from high-current power cables to minimize electrical noise coupling. Meanwhile, connect cable shields according to site grounding standards.

Finally, power up the system and verify channel states through the safety controller. The typical 10 ms input delay provides stable signal recognition. Moreover, review diagnostic reports to confirm proper channel health after commissioning.

Packaging List

• 1 × Honeywell FC-SDI-1624 Safety Digital Input Module

• 1 × Anti-static protective bag

• 1 × Carton packaging

FAQ

Q1: What safety certification does the FC-SDI-1624 carry?
A: The module is certified to SIL 3 under IEC 61508. This makes it suitable for emergency shutdown and fire and gas safety loops.

Q2: How many input channels does this module provide?
A: The FC-SDI-1624 offers 16 independent digital input channels. Each channel accepts 24VDC discrete signals from field devices.

Q3: Can the module detect field wiring faults?
A: Yes. The module supports open circuit and short circuit detection when configured with end-of-line resistors. It also performs continuous self-tests on internal circuitry.

Q4: What are the input voltage thresholds?
A: The module recognizes a HIGH state above 15 VDC and a LOW state below 9 VDC with input current under 2 mA.

Q5: How is the module shipped?
A: We ship via Fedex, UPS, and DHL. Each unit arrives in anti-static packaging inside a protective carton.