Honeywell 51308386-176 DC-TDOB11 Redundant Digital Output IOTA
01Technical Summary
Honeywell 51308386-176 is associated with the DC-TDOB11 Series C I/O termination assembly. DC-TDOB11 is the redundant IOTA for the DO-24B bussed low-voltage digital-output function and is paired with the compatible CC-PDOB01 I/O module in an Experion Series C architecture.
02Applications
Typical Uses
- Bussed 24 V DC discrete-output termination in Experion Series C systems.
- Redundant digital-output installations using the compatible CC-PDOB01 I/O module.
- Field wiring for solenoids, interposing relays, indicators, and other loads within the engineered output limits.
- Like-for-like maintenance of an installed DC-TDOB11 IOTA.
Selection Boundary
- Use the exact model and manufacturer identity shown on the installed product.
- Treat application examples as context, not as proof of compatibility.
- Confirm electrical, mechanical, communication, safety, and environmental requirements before ordering.
03Specifications
| Manufacturer | Honeywell |
|---|---|
| Part Number | 51308386-176 |
| IOTA Model | DC-TDOB11 |
| Product Family | Experion Series C I/O |
| I/O Function | DO-24B bussed low-voltage digital output |
| Field Voltage Class | 24 V DC |
| Redundancy | Redundant IOTA arrangement |
| Compatible I/O Module | CC-PDOB01 |
| Universal Marshalling Support | Supported with the documented Honeywell marshalling solution |
| Installation Role | Field termination and I/O module carrier assembly |
| Channel Count | Use the matched IOM/IOTA documentation for the installed revision |
| Procurement Control | Match 51308386-176, DC-TDOB11, IOM model, and hardware revision |
04Features
Design and Functions
- Provides the redundant IOTA arrangement for the DO-24B function.
- Supports bussed low-voltage 24 V DC digital outputs.
- Pairs with the documented CC-PDOB01 Series C I/O module.
- Integrates field termination and module support in the Series C I/O architecture.
- Can be included in Honeywell universal marshalling designs where the supported-hardware table permits it.
- Exact channel loading, fusing, wiring, redundancy, and hazardous-area requirements remain project controlled.
Product Identity
- Manufacturer: Honeywell
- Model: 51308386-176 / DC-TDOB11
- Product Type: Redundant 24 V DC Digital Output IOTA
- Review Status: Verified
05Compatibility
- Use with the CC-PDOB01 digital-output I/O module and the documented Series C carrier architecture.
- Match redundant versus non-redundant IOTA type; DC-TDOB01 and DC-TDOB11 are not the same arrangement.
- Confirm field power distribution, load type, channel current, common grouping, protective devices, marshalling hardware, and terminal assignments.
- Match hardware revision, coating or regional variant, cabinet layout, and Experion release.
- Do not treat another 24 V digital-output IOTA as a direct replacement without Honeywell compatibility confirmation.
06Maintenance & Replacement
- Export the I/O database and record slot, tag, channel, redundancy, and wiring information.
- Photograph every terminal and label before removing field wiring.
- De-energize field and system power according to the approved procedure.
- After exchange, verify module recognition, redundancy health, channel state, output forcing restrictions, field voltage, load operation, diagnostics, alarms, and fail-safe behavior.
- Perform a controlled loop test for every affected output before returning the process to service.
FAQFrequently Asked Questions
What is
51308386-176 / DC-TDOB11 is a Honeywell redundant Series C IOTA for bussed 24 V DC digital outputs.
Where is this product used?
It is used with the compatible CC-PDOB01 I/O module in an Experion Series C control system.
What should be confirmed before ordering?
Confirm the complete model or part number, manufacturer, installed hardware revision, electrical design, interfaces, wiring, approvals, and project configuration.
What information should be recorded before replacement?
Record the part number, IOTA and IOM models, revisions, slot, tags, channel wiring, field power, loads, redundancy state, marshalling, diagnostics, and database backup.
Is another model a direct replacement?
Use only a Honeywell-confirmed IOTA for the exact IOM, redundancy, wiring, voltage, cabinet, and system-release design.
What should be checked after installation?
Verify hardware recognition, redundancy, diagnostics, field power, every output state, load response, alarms, interlocks, and fail-safe action.
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