Product Overview

The Honeywell DC-TDOB01 is a high-density Series C Digital Output (DO) module engineered for the Experion Process Knowledge System (PKS) and FSC system environments. Featuring 32 galvanically isolated channels, this unit provides a robust interface for controlling field actuators via dry contact relays. The module is specifically designed to eliminate the need for traditional separate chassis by integrating electronic circuitry and field terminations into a single, compact profile. This design philosophy significantly reduces the total cabinet footprint while enhancing the thermal management of the control system through a unique tilted form factor that promotes natural convection.

Architectural Performance and Hardware Parameters

• Channel Density: 32 Discrete Output Channels

• Relay Configuration: Jumper-selectable Form-A (Normally Open) or Form-B (Normally Closed)

• Isolation Rating: 1500V AC Galvanic Isolation

• Switching Response: ≤10ms (Typical)

• Output Rating: 24V DC at 0.5A per channel (Supports 15-30V DC load range)

• Protection Circuitry: Integrated counter EMF snubbing and short-circuit protection

• Operating Temperature: -40°C to +70°C (-40°F to 158°F)

• Status Monitoring: Per-channel LED indicators and "Information Circle" system alerts

• Net Weight: 0.4 kg

• Module Dimensions: 18.8 x 19.1 x 6.5 cm

• Export Code: 8537101190

• Manufacturing Origin: USA

Industrial Deployment and Control Utility

The DC-TDOB01 is a preferred solution for mission-critical automation in the oil and gas, chemical processing, and power generation sectors. Because the module utilizes socketed relays, maintenance teams can perform individual channel repairs without replacing the entire electronics assembly, drastically reducing lifecycle costs. Its ability to support redundant I/O configurations ensures that critical process outputs—such as main fuel trip valves or emergency sirens—remain operational even in the event of a primary module failure. The detachable two-level terminal blocks allow for pre-wiring of the IOTA (I/O Termination Assembly), facilitating rapid "hot-swap" replacements in continuous process environments where downtime is not an option.

FAQ

Q: Does the DC-TDOB01 support redundant output configurations?

A: Yes, the module is fully compatible with redundant I/O termination assemblies (IOTA), allowing two DC-TDOB01 modules to operate in a parallel, high-availability mode.

Q: Can I mix Normally Open and Normally Closed channels on the same module?

A: Yes, because each channel is jumper-selectable, you can independently configure every individual relay as either Form-A or Form-B based on your specific field device requirements.

Q: Is external power required for the field-side relays?

A: The module receives its field power directly through the IOTA interface, which simplifies wiring; however, the actual load voltage (15-30V DC) must be supplied to the common terminals of the termination assembly.

Q: How does the "tilt" design improve cabinet performance?

A: The angled mounting of the Series C hardware allows for higher module density within a standard 19-inch rack while creating a more efficient airflow path, keeping the internal components cooler during high-load operations.

Q: What is the benefit of socketed relays in this module?

A: Socketed relays allow for the replacement of a single mechanical relay if it reaches the end of its electrical life, meaning you do not have to discard the entire 32-channel electronic module for a single point failure.