Description
1. Product Overview
HONEYWELL DC-TDOB01 is a high-performance digital output module designed for Honeywell’s DeltaV™ distributed control system (DCS), specializing in reliable switching of discrete signals to actuate field devices (valves, pumps, relays, motors) in critical industrial processes. As a core component of Honeywell’s DeltaV CHARMs I/O portfolio, HONEYWELL DC-TDOB01 delivers 16 channels of isolated digital outputs with fast response times and robust protection features, making it ideal for oil & gas refineries, petrochemical plants, power generation facilities, and pharmaceutical manufacturing sites. In a refinery’s emergency shutdown (ESD) system, HONEYWELL DC-TDOB01 triggers valve closure and pump shutdowns; in a chemical plant, HONEYWELL DC-TDOB01 actuates safety interlock relays for reactor control; in a water treatment facility, HONEYWELL DC-TDOB01 controls chemical dosing pump switches. Additionally, HONEYWELL DC-TDOB01 features hot-swappable design, advanced diagnostics, and seamless DeltaV integration, ensuring uninterrupted operation and minimal downtime in mission-critical environments.
2. Product Parameters
2.1 Core Output Specifications
- Output Channels: 16 isolated digital output channels (2 channels per group, galvanic isolation between groups)
- Output Type: Form A (NO) solid-state relays (SSR), 24V DC rated
- Output Rating: 2A per channel (resistive load), 1A per channel (inductive load)
- Switching Time: ≤1ms (on/off transition)
- Isolation Rating: 2500V AC between channels (group-to-group), 3000V AC between module and backplane
- Protection: Overcurrent protection (3A per channel), short-circuit protection, reverse polarity protection
2.2 Electrical & System Parameters
- Power Supply: 24V DC (supplied by DeltaV I/O rack), power consumption ≤12W
- Backplane Interface: DeltaV CHARMs bus, digital communication with DeltaV controller
- Diagnostic Features: Output fault detection (short-circuit/overcurrent), channel status monitoring, module self-test (BIT), LED per-channel status indicators
- Configuration: Software-configurable fail-safe state (de-energize-to-safe/energize-to-safe) via DeltaV Explorer
- Redundancy Support: Compatible with DeltaV redundant I/O rack configurations
2.3 Environmental & Mechanical Parameters
- Operating Temperature: -40°C to +70°C (broad industrial range for extreme conditions)
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5% to 95% (non-condensing), resistant to humidity fluctuations
- Vibration Resistance: 5-500Hz, 2g (IEC 60068-2-6)
- Shock Resistance: 30g (11ms, IEC 60068-2-27)
- Mounting: DeltaV I/O rack-mounted, hot-swappable (plug-in module)
- Dimensions: 120mm (W) × 100mm (H) × 60mm (D), compact DeltaV form factor
2.4 Certifications & Compliance
- Safety Certifications: SIL 3 (IEC 61508/61511), TÜV Rheinland, ATEX Zone 2 (Ex nA IIC T4)
- Industry Certifications: CE, UL/cUL Class 1 Div 2, FCC Part 15, RoHS, NEMA 4X (when installed in sealed rack)
- Compatibility: Honeywell DeltaV DCS (v13.3+), DeltaV CHARMs I/O system, third-party 24V DC field devices
- MTBF: ≥1,500,000 hours (per Telcordia SR-332 standards)
3. Advantages & Features
- Fast & Reliable Switching: ≤1ms transition time of HONEYWELL DC-TDOB01 ensures immediate actuation of critical safety devices (e.g., ESD valves), reducing response time for emergency scenarios and improving process safety.
- Comprehensive Protection: Overcurrent, short-circuit, and reverse polarity protection safeguard HONEYWELL DC-TDOB01 and connected field devices from electrical faults, minimizing equipment damage and unplanned downtime.
- Configurable Fail-Safe States: Software-adjustable fail-safe settings (de-energize/energize-to-safe) enable alignment with site safety protocols, ensuring safe system behavior during module or power failures.
- Hot-Swappable Design: HONEYWELL DC-TDOB01 can be replaced in live DeltaV systems without interrupting control or actuation, maximizing system availability and reducing maintenance downtime.
- Seamless DeltaV Integration: Native compatibility with Honeywell DeltaV DCS and CHARMs I/O system ensures plug-and-play setup, reducing commissioning time and integration risks.
4. Application Fields & Cases
4.1 Application Fields
- Oil & Gas: Refinery ESD valve control, offshore platform pump shutdown, pipeline isolation valve actuation
- Petrochemical: Chemical reactor safety interlock relays, batch process sequencing switches, storage tank overfill protection
- Power Generation: Turbine auxiliary system control, boiler safety interlocks, renewable energy inverter disconnect switches
- Pharmaceutical: Cleanroom safety door locks, hazardous material handling equipment control, batch manufacturing process actuators
4.2 Typical Cases
- Refinery ESD System Control: A major Middle Eastern refinery deployed HONEYWELL DC-TDOB01 modules in its DeltaV DCS to control 64 ESD valves across 4 process units. The module’s fast switching time (≤1ms) ensured immediate valve closure during a pipeline pressure anomaly, preventing a potential explosion and $5M in equipment damage.
- Chemical Reactor Interlock Actuation: A European chemical plant integrated HONEYWELL DC-TDOB01 into its DeltaV system to actuate 32 safety interlock relays for reactor temperature/pressure control. The module’s overcurrent protection prevented damage to relays during a power surge, avoiding unplanned downtime and ensuring compliance with EU safety regulations.
- Water Treatment Plant Pump Control: A municipal water treatment facility in North America used HONEYWELL DC-TDOB01 to control 48 chemical dosing pumps and filtration system valves. The module’s diagnostic features identified a short-circuited pump motor before it caused a system fault, enabling proactive replacement and reducing chemical waste by 10%.
5. Competitive Comparison
| Parameter | HONEYWELL DC-TDOB01 | Competitor A (16-channel DO Module) | Competitor B (DeltaV-Compatible DO) |
|---|---|---|---|
| Switching Time | ≤1ms | ≤5ms | ≤2ms |
| Output Protection | Overcurrent/Short-Circuit/Reverse Polarity | Overcurrent only | Short-Circuit only |
| Fail-Safe Configuration | Yes (De-Energize/Energize) | No | Yes (De-Energize Only) |
| Hot-Swappable | Yes | No | Yes |
| SIL Certification | SIL 3 | SIL 2 | SIL 2 |
| MTBF | ≥1,500,000 hours | ≥800,000 hours | ≥1,200,000 hours |
6. Selection Suggestions & Precautions
6.1 Selection Suggestions
- Safety Level & Response Needs: Choose HONEYWELL DC-TDOB01 for SIL 3 SIS applications requiring fast switching (≤1ms) and comprehensive protection (e.g., refinery ESD systems); SIL 2 modules are suitable for low-risk industrial environments (e.g., HVAC control).
- Load Capacity Requirements: Opt for HONEYWELL DC-TDOB01 if controlling medium-current devices (up to 2A resistive load); higher-current modules are needed for heavy-duty motors/pumps (>2A).
- System Compatibility: Select HONEYWELL DC-TDOB01 for Honeywell DeltaV DCS (v13.3+) to ensure native CHARMs integration and full diagnostic support; third-party modules may lack DeltaV-specific features (e.g., configurable fail-safe states).
6.2 Precautions
- Installation Guidelines:
- Install HONEYWELL DC-TDOB01 in DeltaV-certified I/O racks only; ensure proper grounding (≤4Ω) to minimize electromagnetic interference (EMI) with SSR outputs.
- Use 18AWG or larger wiring for high-current outputs (≥1A) to prevent overheating, and avoid running output cables parallel to high-voltage power lines.
- Configuration Notes:
- Configure fail-safe states (de-energize/energize-to-safe) via DeltaV Explorer before commissioning to align with site safety procedures (e.g., de-energize-to-safe for ESD valves).
- Set overcurrent protection thresholds (3A per channel) to match downstream device requirements—do not exceed rated current to prevent SSR damage.
- Troubleshooting:
- For output faults: Check load current (ensure it does not exceed rated capacity), verify wiring for short circuits, and use DeltaV diagnostic logs to identify faulty channels.
- For communication errors: Verify backplane connections and update module firmware (via DeltaV Explorer) to ensure compatibility with the host controller.
- Maintenance:
- Inspect module connectors annually for corrosion or loose pins; clean with compressed air to remove dust and debris (avoid contact with CHARMs pins).
- Test fail-safe functionality quarterly to ensure compliance with safety standards (e.g., verify ESD valves close when module power is lost).
- Stock spare HONEYWELL DC-TDOB01 modules for critical applications—lead times for Honeywell DeltaV components may exceed 8 weeks.

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