Honeywell FC-MCAR-02 Mounting Carrier

Robust Foundation for Safety Manager I/O Systems

The Honeywell FC-MCAR-02 serves as a 36-inch panel-mount carrier for the Safety Manager and Experion PKS remote I/O platforms . This heavy-duty frame provides both mechanical support and electrical distribution for mounted terminal assemblies . The FC-MCAR-02 securely holds two IOTA-R24 redundant assemblies or up to three IOTA-NR24 units on its integrated rails . Its passive design contains no digital circuitry, microprocessors, or communication interfaces .

Power Distribution and Grounding Infrastructure

The carrier integrates dual power rails carrying 24 V DC nominal voltage with a -15% to +30% tolerance range . These rails handle a maximum supply current of 40 A for powering multiple downstream modules . A dedicated grounding rail provides 32 M5 connection points for field device grounding . Two M5 terminals deliver the primary 24V power input to the assembly . Furthermore, the power rails support carrier-to-carrier coupling using two M5 screws through dedicated 5 mm holes .

Physical and Environmental Specifications

Parameter	Specification
Model Number	FC-MCAR-02
Manufacturer	Honeywell
Product Type	SM RIO 36-inch Mounting Carrier
Compatible Assemblies	IOTA-R24 (2 units) or IOTA-NR24 (3 units)
Dimensions (H x W x D)	105.4 x 222.3 x 931.8 mm / 4.15 x 8.75 x 36.7 in
Weight	6.1 kg / 13.4 lbs
Supply Voltage	24 V DC (-15% to +30%)
Max Rail Current	40 A
Ground Connections	32 x M5
Power Connections	2 x M5 terminals; 2 x 5 mm coupling holes
Mounting Holes	4 holes (screw diameter < 5.5 mm)
Operating Temperature	-40°C to +70°C
Storage Temperature	-40°C to +85°C
Relative Humidity	10% to 95% (non-condensing)
Pollution Degree	2 or better
Certifications	CE, UL
Country of Origin	USA

Installation and System Integration

The FC-MCAR-02 mounts directly onto any flat surface using four screws under 5.5 mm diameter . Its components include a cable carrier assembly (CCA), a metal profile, two plastic cover plates, the ground rail with 32 screws, and two power rails with M5 holes . This carrier forms the foundational hardware for remote safety instrumentation in oil and gas, power generation, and chemical processing facilities . Additionally, the passive busbar matrix supports safe signal transmission for critical emergency shutdown loops and fire and gas detection systems . The industrial-grade construction ensures reliable operation across demanding continuous plant operations without generating localized thermal buildup .