Honeywell FC-IOTA-R24 51306505-175 Redundant I/O Termination Assembly

   The IOTA-R24 can be used in applications up to SIL 3, in compliance with IEC 61508/61511.
   The IOTA-R24 provides for:
        connectors for two (redundant) RUSIO-3224 or RUSLS-3224 modules
        32 (universal) IO channel connections (CN1 and CN2)
        4 (identical) V+ connections (CN3), for active AI devices
        two RJ45 connectors for 100MB Ethernet communication (RIOLA and RIOLB)
        24V power connection (24V screw and COM screw to the carrier power rails)

CN1 detail
Channel 1 thru 16 on CN1
IO-channel 1 thru 16 are terminated on CN1.
   Detail A shows the top and side view (field-connectors placed).
   Detail B shows the second side-view with the field-connectors placed.
   Detail C shows the second side-view with the field-connectors removed.

CN2 detail
Channel 17 thru 32 on CN2
IO-channel 17 thru 32 are terminated on CN2.
   Detail A shows the top and side view (field-connectors placed)
   Detail B shows the second side-view with the field-connectors placed.
   Detail C shows the second side-view with the field-connectors removed.

ESD jumper
ESD enable / disable link
   The ESD function (on channel 32) can be enabled (or disabled) with a link on the IOTA.
   In case the link is placed in the drawn position (See Figure 436 on page 695), channel 32 can be used as universal channel (analog or digital; input or output).
   In case the link is in the ENABLE position, channel 32 must be used as ESD input.
   A (normally closed) ESD switch (with 1 kOhm series resistor) must be connected between CH32+ and CH32- of the IOTA.

   The Honeywell FC-IOTA-R24 provides robust and flexible I/O termination for safety-critical systems. It supports up to two redundant I/O modules (RUSIO-3224 or RUSLS-3224) and 32 universal channels via CN1 and CN2, allowing diverse field signal connections. Four identical V+ pins on CN3 provide power to active analog devices, simplifying field wiring. Redundant 100 Mbps Ethernet ports ensure reliable communication, while the assembly accommodates a 24 Vdc power supply with reverse-polarity protection. Designed for SIL 3 compliance and harsh industrial environments (–40 to +70 °C, 10–95% RH), the FC-IOTA-R24 enhances system integrity and operational reliability in high-demand applications.

   The FC-IOTA-R24 is widely used in Safety Manager and Safety Manager A.R.T. systems for process automation and safety monitoring. It is ideal for oil & gas, chemical, power generation, and refining industries where reliable, redundant I/O is required. Typical applications include analog and digital signal aggregation from field transmitters, sensors, and actuators, enabling central monitoring and control while maintaining functional safety. The assembly's compatibility with active AI devices, robust environmental ratings, and SIL 3 certification ensures continuous operation in hazardous or demanding industrial environments.

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