Description

The Honeywell CC-TDOB01 is a 9-inch non-redundant Digital Output 24V Input Output Termination Assembly (IOTA) designed for the Honeywell Experion PKS Series C architecture. It serves as the physical interface layer connecting field-level actuators, relays, indicators, and solenoids to the corresponding Series C Digital Output 24V I/O Module (IOM).

Engineered to support up to 32 discrete channels, the assembly routes control signals and power directly to field devices through dedicated terminal block connections. The architecture supports field wiring protection mechanisms integrated with the IOM, including individual channel current monitoring and over-current shutdown features.

The board accommodates flexible system powering options, accepting both internal system power or customer-supplied external 24V DC power sources. Its non-redundant 9-inch footprint offers a compact installation footprint for standardized control cabinets in industrial automation environments.

Features

• 32-Channel Field Termination: Provides dedicated power and return screw connections for 32 discrete 24V DC output channels across two primary terminal blocks.
• Selective Over-Current Protection Support: Works with the digital output module to sense field shorts, automatically shutting down only the affected point while leaving non-faulted channels operational.
• Soft Failure Diagnostic Signaling: Facilitates an Over-current Soft Failure alarm generation and switches the faulted point mode to Manual until the short circuit is resolved.
• Thermal Protection Monitoring: Supports thermal protection alarming for field short circuit conditions exceeding 0.5A.
• Flexible Power Source Configuration: Configurable via Terminal Block 3 to select between Honeywell internal 24V power supply or external customer-supplied 24V power.
• Compact Non-Redundant Footprint: Standardized 9-inch Series C board profile designed for efficient cabinet space utilization.

Applications

• Process Output Actuation: Interfacing Experion PKS Series C controllers with field solenoids, interposing relays, and control valves.
• Industrial Plant Annunciation: Driving discrete field indicators, alarms, stack lights, and status panels.
• Discrete System Control: Providing 24V DC switching logic for batch, continuous process, and manufacturing automation infrastructure.

Technical Specifications

Connections / Interfaces

Installation Guidelines

1. Inspect the IOTA board for mechanical integrity prior to installation in the Series C cabinet.
2. Mount the 9-inch IOTA board onto the panel rack or enclosure backplate following Series C spacing standards.
3. Confirm whether internal or external 24V power will be utilized and wire Terminal Block 3 accordingly.
4. Ensure proper power polarity on external supply lines to prevent module damage.
5. Wire field devices to Terminal Blocks 1 and 2, securing positive leads to power screws and negative leads to return screws.
6. Seat the corresponding Series C 24V Digital Output IOM firmly into the card position on the IOTA assembly.

Replacement Recommendations

1. Verify that the replacement part number matches CC-TDOB01.
2. Disconnect field power supplying Terminal Block 3 if using an external power source.
3. Remove the associated I/O Module from the IOTA card connector.
4. Label and disconnect field wiring screw terminal plugs or leads from TB1, TB2, and TB3.
5. Unmount the degraded IOTA board, mount the new assembly, reconnect wiring plugs, and reinsert the IOM.
6. Reapply power and verify channel diagnostic status in Experion PKS system software.