Honeywell FC-IOTA-R24 Redundant IO Termination Assembly Configured for redundant field I/O termination and 24 VDC power distribution in Honeywell Safety...
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Configured for redundant field I/O termination and 24 VDC power distribution in Honeywell Safety Manager systems, the Honeywell FC-IOTA-R24 (FC-IOTA-R24 Redundant IO Termination Assembly) provides direct physical and electrical execution for connected I/O circuits.
Hardware Specifications
Parameter
Specification
Model
FC-IOTA-R24
Brand
Honeywell
Origin
USA
Product Type
Redundant IO Termination Assembly
Weight
0.57 kg (1.26 lbs)
Dimensions
64 x 120.7 x 443.2 mm (2.52 x 4.75 x 17.45 in)
Operating Temp
-40 to +70 deg C (-40 to +158 deg F)
Storage Temp
-40 to +85 deg C (-40 to +185 deg F)
Relative Humidity
10 to 95% non-condensing
Pollution Degree
Pollution degree 2 or better
Power Consumption
Supply load: max. 10 A
Supply Voltage
24 VDC -15% to +30%
Approvals
CE, UL, TUV
Reverse Polarity Protection
Parallel diode protection (blows fuse)
Fuse Rating
15 A
Fuse Type
Blade fuse, 5 x 19 mm
Fuse Voltage Rating
32 VDC
Fuse Manufacturer
Littelfuse
Fuse Part Number
0287015.PXS
V+ Terminal Current
Max. 1 A total across four CN3 pins
V+ Voltage Drop
Less than 1.5 V at 0.7 A
V+ Reverse Voltage
Max. 36 V
24 V Supply Connection
2 x M4 connections to carrier power rail
Ground Connection
10 x M3.5 connections to carrier metal structure
Ethernet Interface
RJ-45
IO Connectors
CN1 and CN2: Weidmuller BLZ 5.08/16/90F SN SW
V+ Connector
CN3: Weidmuller BLZ 5.08/4/90F SN SW
Screw Terminal Wire Size
0.50 to 2.50 mm2
Screw Terminal Strip Length
7 mm
Screw Terminal Tightening Torque
0.5 Nm (0.37 ft-lb)
Honeywell Process Control Signal Termination Features
The FC-IOTA-R24 provides redundant I/O field termination functions with dedicated terminal interfaces for signal wiring, power distribution, and carrier connections. Moreover, the assembly manages 24 VDC supply routing through protected terminals and integrates reverse polarity protection using a parallel diode circuit with fuse interruption.
The unit supports structured wiring within Honeywell safety control architectures by separating field connections from carrier-level power interfaces. In addition, the termination assembly maintains electrical isolation requirements between connected field devices and system-level interfaces through controlled terminal arrangements.
The FC-IOTA-R24 supports industrial process control installations where DCS and safety system I/O circuits require organized termination. Furthermore, Honeywell process platforms commonly implement channel-to-channel isolation concepts and signal integrity control for analog and digital field interfaces, although this assembly specifically provides termination and distribution functions rather than measurement processing.
Frequently Asked Questions
Q: Does the FC-IOTA-R24 provide active I/O signal processing functions? A: No. The FC-IOTA-R24 functions as a redundant I/O termination assembly and provides field connection, power distribution, and wiring management functions.
Q: What protection method does the FC-IOTA-R24 use against incorrect supply polarity? A: The assembly uses a parallel diode reverse polarity protection circuit. When reverse voltage occurs, the protection path causes the fuse to disconnect the supply circuit.
Q: What type of field wiring connection does the FC-IOTA-R24 support? A: The assembly uses Weidmuller screw terminal connectors for CN1, CN2, and CN3 interfaces. The terminals accept 0.50 to 2.50 mm2 wire sizes with a 7 mm strip length.
Field Installation Guidelines
Install the FC-IOTA-R24 on the specified carrier assembly and secure all mechanical mounting points before wiring.
Connect the 24 VDC supply through the dedicated M4 power rail connections and verify polarity before energizing the system.
Connect the grounding terminals to the carrier metal structure to maintain the required protective bonding path.
Route Ethernet and I/O wiring separately from high-voltage power cables to reduce electrical interference.
Verify CN1, CN2, and CN3 terminal assignments before field connection to prevent incorrect signal routing.
Tighten screw terminals according to the specified torque requirement and confirm cable retention after installation.
Inspect fuse status and supply polarity protection before commissioning the redundant I/O termination assembly.
