Description

The Honeywell CC-TDOD61 (Part Number: 51307089-175)is a 12-inch Redundant Digital Output Input Output Termination Assembly (IOTA) designed for high-density discrete switching operations in process control systems. Engineered specifically to interface with the Experion Series C control platform, this assembly serves as the physical mounting base, power carrier, and field wiring termination interface for 24 VDC digital output operations.

Operating as a key component in Experion Process Knowledge System (PKS) hardware architectures, the module provides redundant support for the CC-PDOD51 Digital Output Input Output Module (IOM). The assembly connects directly to the 24 VDC system power bus via its integrated carrier, distributing power and signal routing across 32 discrete output channels without requiring dedicated external marshalling panels.

The unit features a dual-level detachable terminal block system for direct landing of field wiring, supporting both internal and external field excitation configurations. Designed with a tilted vertical footprint, the CC-TDOD61 optimizes control cabinet air circulation and spatial efficiency while ensuring high operational reliability through galvanic system-to-field isolation.

Features

• Redundant System Architecture: Accommodates dual I/O modules on a single 12-inch assembly for seamless hot-backup switchover with zero switchover gap time.
• 32-Channel Switching Capability: Delivers 32 discrete digital output channels engineered for open-drain (sinking) load control.
• Integrated Power Carrier Interface: Mounts directly to the 24 VDC system power bus carrier to supply operational power to the attached IOM and field circuits without external jumpers.
• Galvanic Isolation: Provides up to 1000 VAC RMS system-to-field isolation when using user-supplied external field power.
• Flexible Excitation Architecture: Supports configuration choices for internal system power or external field excitation.
• Detachable Terminal Blocks: Features two-level removable screw-terminal blocks accepting field conductors up to 12 AWG (2.5 mm squared).
• Thermal Management Design: Incorporates the Series C tilted vertical form factor to maximize cabinet packing density and promote vertical convection cooling.

Applications

• Process Valve Control: Interfacing discrete solenoid valves and automated block valves in continuous processing environments.
• Interposing Relay Drive: Actuating low-current interposing relays and contactor coils within motor control centers (MCC).
• Industrial Indication: Driving status lamps, visual alarms, and panel annunciators.
• Discrete Logic Interfacing: Providing galvanically isolated digital outputs to third-party sub-systems, package units, and safety systems.

Technical Specifications

Connections / Interfaces

Installation Guidelines

1. Pre-Installation Inspection: Unpack the IOTA and inspect the assembly for physical damage. Verify that the unit model number is CC-TDOD61 and confirm compatibility with the target CC-PDOD51 IOMs.
2. Mounting: Secure the 12-inch IOTA onto the Series C system cabinet mounting channel. Ensure all base retention screws are tightened to maintain ground continuity and connect to the 24 VDC power carrier bus.
3. Field Wiring Connection: Strip field wire ends appropriately and land discrete sinking load connections on the two-level detachable terminal block assemblies. Acceptable wire range is up to 12 AWG (2.5 mm squared).
4. Power Selection: Select internal power distribution or connect an isolated external 24 VDC field power supply according to system isolation requirements.
5. IOM Installation: Align and press the primary and redundant CC-PDOD51 Digital Output Modules into their respective IOTA guide slots until fully seated and latched.

Configuration and Replacement Guidelines

• Safe-State Configuration: Ensure the individual channel FAILOPT parameters (Hold Last Value or Shed to Safe State) are established in the C300 controller engineering repository prior to system commissioning.
• Hot-Swapping IOMs: On a redundant CC-TDOD61 assembly, an individual CC-PDOD51 module can be removed or inserted under power without interrupting field output operations on the active partner module.
• Maintenance Verification: Before servicing field devices or replacing connected loads, verify field supply voltage levels at the IOTA terminals using a calibrated multimeter.