Overview
Configured for field wiring termination in the Honeywell Safety Manager safety instrumented system, the Honeywell FC-IOTA-NR24 51306507-175 (FC-IOTA-NR24 Non-redundant IO Termination Assembly) provides direct electrical termination for RUSIO-3224 and RUSLS-3224 Universal Safety IO modules. It supports 32 channels through CN1 and CN2 and provides dedicated V+ field-device power connections through CN3.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FC-IOTA-NR24 51306507-175 |
| Base Model | FC-IOTA-NR24 |
| Product Type | Non-redundant IO Termination Assembly |
| Brand | Honeywell |
| Application | Safety Manager safety instrumented system |
| Compatible Modules | RUSIO-3224, RUSLS-3224 Universal Safety IO modules |
| Channel Capacity | 32 channels |
| Channel Connection | Channels 1-16 via CN1; Channels 17-32 via CN2 |
| Field Power Connection | V+ via CN3 |
| Supply Voltage | 24 VDC -15% to +30% |
| Supply Rail Current | Max. 40 A |
| Operating Temp | -40 to +70 deg C (-40 to +158 deg F) |
| Storage Temp | -40 to +85 deg C (-40 to +185 deg F) |
| Power Consumption | Not specified in provided data |
| Weight | 0.45 kg |
| Dimensions | Estimated shipping size: 29.4 x 12 x 6 cm |
| Origin | USA |
| Tariff Code | 8537101190 |
Safety Manager I/O Termination and Field Wiring
The FC-IOTA-NR24 terminates field wiring for a non-redundant Universal Safety IO configuration. CN1 carries channels 1 through 16, while CN2 carries channels 17 through 32. This arrangement separates the 32 field channels into two connector groups.
CN3 provides V+ connections for field-device power distribution through the termination assembly. The assembly also provides Ethernet connectors for communication with the associated Universal Safety IO modules. Therefore, installation should maintain clear separation between field wiring, power connections, and network cabling.
Frequently Asked Questions
Q: How many field channels does the FC-IOTA-NR24 support?
A: The assembly supports up to 32 channels. CN1 connects channels 1 through 16, while CN2 connects channels 17 through 32.
Q: Which Universal Safety IO modules are specified for use with the FC-IOTA-NR24?
A: The provided data specifies the RUSIO-3224 and RUSLS-3224 Universal Safety IO modules.
Q: What supply voltage and maximum supply rail current does the assembly specify?
A: The specified supply voltage is 24 VDC with a -15% to +30% tolerance. The supply rail current is rated at a maximum of 40 A.
Field Installation Guidelines
- Install the FC-IOTA-NR24 according to the applicable Honeywell Safety Manager hardware documentation.
- Confirm the assembly is configured for the intended non-redundant I/O architecture before connecting field wiring.
- Connect channels 1 through 16 to CN1 and channels 17 through 32 to CN2 according to the approved wiring documentation.
- Use CN3 for the specified V+ field-device power connections.
- Keep Ethernet communication wiring physically organized and separated from high-current field power wiring where practical.
- Route signal wiring to minimize exposure to switching conductors and other sources of electrical interference.
- Terminate cable shields according to the grounding and EMC requirements of the complete Safety Manager installation.
- Verify supply polarity, terminal identification, and field-device wiring before energizing the assembly.
- Confirm that the connected power distribution remains within the specified maximum 40 A supply rail current.
- Check the installation environment against the specified operating range of -40 to +70 deg C.
- Do not apply redundant I/O wiring practices to this assembly unless the complete system design explicitly specifies such an architecture.
- Perform continuity and insulation checks according to the site commissioning procedure before placing connected safety I/O channels into service.
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