Honeywell FC-SDI-1624

Description

Detailed parameter table

Honeywell FC-SDI-1624

Product introduction

The FC-SDI-1624 is a high-performance safety digital input module from Honeywell, designed to serve as a critical data acquisition component in industrial safety systems. As a key part of Honeywell’s safety I/O portfolio, this module is engineered to collect and process status signals from 16 isolated channels of safety-critical devices, converting raw input data into reliable information for safety controllers and monitoring platforms.

FC-SDI-1624 excels in capturing signals from a wide range of safety devices, including emergency stop buttons, interlock switches, light curtains, and pressure/temperature limit switches. Its configurable input types (PNP, NPN, dry contact) ensure compatibility with diverse sensor technologies, while SIL 2 certification guarantees reliability in safety loops where failure to detect a hazard could lead to personnel injury or asset damage. Whether integrated with Honeywell’s Safety Manager for emergency shutdown logic or with Experion PKS for centralized monitoring, FC-SDI-1624 provides real-time, accurate input data—forming the foundation of robust safety decision-making in industries such as oil and gas, chemicals, and manufacturing.

Core advantages and technical highlights

Configurable input versatility: FC-SDI-1624 offers 16 channels that can each be independently configured as 24 V DC PNP, 24 V DC NPN, or dry contact inputs. This flexibility eliminates the need for separate modules for different sensor types, simplifying system design in facilities with mixed safety devices—for example, a chemical plant using PNP light curtains, NPN door interlocks, and dry contact pressure switches. Engineers can program input types via software, reducing inventory complexity and easing retrofits of legacy systems.

Ultra-fast response time: With a base response time of ≤1 ms, FC-SDI-1624 ensures immediate detection of safety events—critical for high-speed machinery where even a small delay could result in harm. For environments with electrical noise, the response time is configurable up to 100 ms to filter interference, balancing speed and signal stability. This adaptability makes it suitable for both precision applications (e.g., robotic cell interlocks) and harsh industrial settings (e.g., vibrating pump stations).

Enhanced safety integrity: Certified to SIL 2 per IEC 61508, FC-SDI-1624 incorporates redundant signal processing, 99% fault coverage via built-in diagnostics, and continuous channel health monitoring. It detects faults such as open circuits, short circuits, and overvoltage conditions, triggering immediate alerts to prevent false or missed signals. This level of reliability is essential in applications like machine guard interlocks, where a failed input could mask a breached safety barrier.

Robust isolation: Each of the 16 channels features 3 kV AC isolation from other channels and the backplane, preventing ground loops and electrical interference that could corrupt signals. This isolation ensures a fault in one channel (e.g., a shorted emergency stop) does not affect others, maintaining system integrity in distributed safety loops. For example, in a refinery with multiple wellhead safety switches, a fault in one well’s sensor won’t disable monitoring of others.

Typical application scenarios

In oil and gas refineries, FC-SDI-1624 monitors safety devices in crude oil distillation units. Its 16 channels connect to dry contact pressure switches (high/low pressure alarms), NPN temperature limit switches, and PNP emergency stop buttons. The module’s fast response time (<1 ms) ensures immediate detection of overpressure events, triggering Safety Manager to activate shutdown valves via FC-TSDO-0824 outputs. When paired with FC-TSGAS-1624 (gas detection module), it creates a comprehensive safety network where gas leaks and pressure hazards are both monitored in real time.

Automotive manufacturing plants utilize FC-SDI-1624 in robotic welding cells, where it monitors light curtains (PNP), guard door interlocks (NPN), and pull-cord emergency stops (dry contact). The module’s configurable inputs simplify integration with mixed sensor types, while its 3 kV isolation prevents electrical noise from welding equipment from corrupting signals. If a worker breaches the light curtain, FC-SDI-1624 detects the signal within 1 ms, prompting Safety Manager to stop the robot and sound alarms—minimizing injury risk.

Chemical processing facilities deploy FC-SDI-1624 to monitor tank farm safety devices, including float switch contacts (dry contact), emergency isolation valve position sensors (NPN), and area emergency stops (PNP). Its wide operating temperature range (-40°C to +70°C) withstands outdoor storage conditions, while HART communication with Experion PKS provides real-time status updates. The module’s diagnostics alert maintenance teams to faulty sensors, ensuring the safety loop remains functional during critical batch operations.

Honeywell FC-SDI-1624

Related model recommendations

FC-SDI-3224: A 32-channel variant of FC-SDI-1624, ideal for large-scale systems like refineries or automotive plants requiring extensive safety monitoring.

FC-TSDO-0824: Honeywell’s safety digital output module that pairs with FC-SDI-1624 to form complete safety loops, executing shutdowns or alarms based on input signals.

FC-TSGAS-1624: Gas detection interface module that complements FC-SDI-1624 in hazardous areas, combining gas concentration data with safety device status for comprehensive risk management.

FC-QPP-0001: Safety controller that processes data from FC-SDI-1624, enabling complex logic sequences and extending safety capabilities to SIL 3 in redundant configurations.

SensaGuard 440G: Honeywell’s safety light curtain with PNP outputs, optimized for seamless integration with FC-SDI-1624 in machine safety applications.

FC-PS24-3A: Redundant 24 V DC power supply designed to support FC-SDI-1624, ensuring uninterrupted operation during power fluctuations.

Safety Manager: Honeywell’s safety instrumented system that integrates FC-SDI-1624 data to execute emergency shutdowns and coordinate multi-zone safety responses.

Installation, commissioning and maintenance instructions

Installation preparation: Before installing FC-SDI-1624, ensure the DIN rail is mounted in a dust-free, vibration-free enclosure (explosion-proof if in hazardous areas) with ambient temperature between -40°C and +70°C. Use a torque wrench set to 1.0 Nm to secure the module. Verify the 24 V DC power supply is isolated, fused (2A), and grounded to minimize noise. Use 0.75 mm² shielded twisted-pair cables for input connections, grounding the shield at the module end. Route signal cables separately from power lines, and label each channel with the connected device (e.g., “ES-201 Stop Button”) for troubleshooting. If integrating with FC-TSGAS-1624, ensure cables are routed to avoid cross-interference.

Maintenance suggestions: For FC-SDI-1624, perform monthly visual inspections to check for loose terminals or corrosion. Test input channels quarterly using a signal generator or test switch, verifying response time and correct status reporting in Safety Manager. Use Honeywell’s Safety Builder software monthly to run diagnostic scans, checking for channel faults or communication errors. Calibrate response time annually using an oscilloscope, ensuring it meets application requirements (≤1 ms for high-speed loops). Coordinate maintenance with paired modules like FC-TSDO-0824 to minimize system downtime. Replace with Honeywell-certified spares only to maintain SIL 2 integrity, and back up configuration settings to a secure device.

Service and guarantee commitment

FC-SDI-1624 is backed by Honeywell’s 5-year warranty, covering manufacturing defects and ensuring compliance with SIL 2 and hazardous area certifications under normal operating conditions. Honeywell’s global safety support team provides 24/7 technical assistance, with certified engineers available to assist with configuration, loop testing, and integration—critical issues are addressed within 4 hours.

We offer on-site commissioning services, including input type verification, response time testing, and integration with Safety Manager or Experion PKS, as well as coordination with complementary modules like FC-TSGAS-1624 and FC-TSDO-0824. Extended warranty options (up to 7 years) include annual preventive maintenance, firmware updates, and priority access to replacement parts. In the event of a fault, Honeywell maintains regional stock of FC-SDI-1624 modules, enabling next-day delivery to minimize safety system downtime. All repairs use genuine components, ensuring the module retains its original isolation ratings, response time, and safety certifications. This commitment reflects Honeywell’s dedication to industrial safety and customer operational confidence.