Honeywell FC-IOTA-NR24 I/O Termination Assembly

Centralized Signal Interface for Safety Manager Systems

The Honeywell FC-IOTA-NR24 serves as a high-density I/O termination assembly for Safety Manager and Experion PKS platforms. This assembly provides 32 universal I/O channel connections for analog, digital, and ESD signals . It supports one RUSIO-3224 or RUSLS-3224 module for flexible I/O configurations . The assembly connects directly to the carrier power rails via two M4 terminals for 24V power distribution . Moreover, eight M3.5 grounding terminals ensure secure connection to the carrier metalwork .

Comprehensive Technical Specifications

Parameter	Specification
Model Number	FC-IOTA-NR24
Manufacturer	Honeywell
Product Type	I/O Termination Assembly (Non-Redundant)
I/O Channel Capacity	32 universal channels (CN1, CN2)
Compatible Module	1 x RUSIO-3224 or RUSLS-3224
Supply Voltage	24 V DC (-15% to +30% tolerance)
Maximum Supply Load	10 A total current draw
Power Connections	2 x M4 terminals (to carrier rail)
Ground Connections	8 x M3.5 terminals (to carrier metal)
Active Device Power (CN3)	4 identical V+ connections
Communication Interface	Dual RJ45, 100 MB Ethernet (RIOLA/RIOLB)
Dimensions (H x W x D)	64 x 120.7 x 293.4 mm
Weight	0.46 kg (net)
Operating Temperature	-40°C to +70°C
Storage Temperature	-40°C to +85°C
Humidity	10% to 95% (non-condensing)
Pollution Degree	2 or better
Fuse Rating	15 A blade type (5 x 19 mm)
Reverse Polarity Protection	Parallel diode
Certifications	CE, UL, TÜV; SIL3 compliant

I/O Connectivity and Communication

The assembly features two Weidmuller connectors (CN1, CN2) for field wiring termination . Each connector supports wire sizes from 0.50 to 2.50 mm² with a 7 mm strip length . The CN3 connector provides four identical V+ terminals for supplying power to active analog input devices, with a maximum current of 1 A per pin . Dual RJ45 ports offer 100 MB Ethernet communication for seamless integration with Safety Manager controllers . This robust connectivity ensures reliable signal transmission for demanding safety applications.

Installation and Environmental Resilience

The FC-IOTA-NR24 mounts directly onto standard DIN rails for fast deployment . Its conformal coating protects against moisture, dust, and corrosive atmospheres . The assembly operates reliably across extreme temperatures from -40°C to +70°C, making it suitable for harsh industrial environments . A 15 A blade fuse and reverse polarity protection safeguard the system against electrical faults . This module is widely deployed in refineries, power generation, chemical plants, and water treatment facilities for safety instrumented functions .