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Key Technical Specifications
| Parameter | Specification Value |
| Manufacturer | Honeywell |
| Part Number | DC-TUIO31 |
| Module Type | Universal Input/Output (UIO) Module |
| Channel Count | 32 Channels (Configurable AI, AO, DI, DO) |
| Nominal Operating Voltage | 24 VDC |
| Input Voltage Range | 18 to 30 VDC |
| Field Signal Types | 0/4-20 mA, 0-10 V, Digital Input (Dry/Wet Contact), Digital Output |
| Isolation Rating | 500 VDC Channel-to-Bus / Channel-to-Channel |
| Power Dissipation | 8.5 W Maximum |
| Mounting Configuration | I/O Input Output Termination Assembly (IOTA) Mount |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) |
| Humidity Rating | 5% to 95% RH (Non-condensing) |
Product Introduction & Supply Chain Strategy
The Honeywell DC-TUIO31 is a 32-channel Universal Input/Output module engineered for the Experion PKS process automation architecture. It interfaces field transmitters, control valves, and discrete switches directly to the C300 controller, supporting software-configurable analog and digital signals on a per-channel basis without requiring hardware jumper adjustments.
Securing this unit as New Surplus protects your facility against unpredicted lead time spikes and costly OEM supply bottlenecks. From a Total Cost of Ownership (TCO) perspective, maintaining a verified new spare eliminates the high risk of secondary failures associated with degraded, refurbished alternatives while guaranteeing full backplane compatibility and immediate deployment during emergency outages.
Installation & Configuration Guide
1.Stage 1: Pre-Installation Prep & Safety:Prerequisite.
Perform Lock-Out/Tag-Out (LOTO) on the designated 24 VDC field power supply. Put on a grounded ESD wrist strap before opening the protective packaging. Document and take clear photographs of all existing wiring, DIP switch configurations, and terminal assignments on the old module.
2.Stage 2: Safe Extraction:Mechanical Removal.
Unscrew the module retention fasteners on the top and bottom of the housing. Carefully disengage the module from the I/O Input Output Termination Assembly (IOTA) by pulling straight outward. Avoid twisting or rocking the unit to prevent bending backplane connection pins.
3.Stage 3: Physical Configuration & Mounting:Module Seating.
Verify that any hardware jumpers or address selectors on the DC-TUIO31 match the original unit exactly. Align the rear connector pins with the IOTA backplane slot and push firmly until the latches snap into position. Tighten the retaining screws to 0.5 Nm.
4.Stage 4: Power-On & Operational Testing:Verification.
Verify field supply voltage measures 24 VDC with zero ground faults before restoring power. Energize the rack and observe the LED status indicators. Confirm the power LED shows steady green and the ERR/FAULT LED clears once the C300 controller completes the hardware handshake.
DC-TUIO31
DC-TUIO31
Firmware/Software Versions & Upgrade Notes
- Recommended Firmware Base: Requires Experion PKS Software Release R400 or higher for full channel-configuration capability.
- Backward Compatibility: Compatible with R310 systems, provided the proper software patches (Hotfix packages) are loaded on the C300 controller prior to insertion.
- Compatibility Warning: Inserting a DC-TUIO31 running newer revision firmware (e.g., v2.10) into an older rack running pre-R400 drivers can cause communication timeouts or channel configuration faults.
- Firmware Sync Policy: Do not perform firmware downgrades in the field. Allow the Experion PKS Control Builder software to automatically push the project-matched firmware revision during initial module binding.
Frequently Asked Questions (FAQ)
Q: Is this DC-TUIO31 unit brand new, or has it been pulled from a decommissioned rack?
A: This product is 100% Brand New Surplus. It has never been installed in a plant environment, never pulled from a working rack, and never repaired. It remains in its original anti-static packaging and has undergone rigorous bench testing and serial number verification.
Q: Why is your price higher than refurbished alternatives online?
A: Our pricing reflects verified original OEM quality. Refurbished parts frequently carry invisible component degradation, such as dried-out electrolytic capacitors or fatigued relays, which dramatically increase the risk of unexpected field failure. Paying a slight premium for New Surplus buys guaranteed operational reliability and avoids unplanned outage costs that can exceed $50,000 per hour.
Q: Can I hot-swap the DC-TUIO31 module while the rest of the rack is live?
A: While Experion PKS supports Hot Swap (Removal and Insertion Under Power – RIUP), you must exercise extreme caution. Ensure the field wiring terminals on the IOTA are isolated or disconnected from active high-power loops to prevent shorting adjacent channels or tripping controller backplane safety fuses during extraction.
Q: Will the module retain its channel configuration if field power is disconnected?
A: No local configuration memory resides permanently on the DC- board itself. The channel configuration parameters (whether a pin acts as 4-20mA, DI, or DO) are held in the C300 controller database and pushed to the module during initial boot-up and handshake.
Q: What warranty coverage comes with this New Surplus Honeywell unit?
A: We back this unit with a comprehensive 1-year replacement warranty from the date of purchase. If the module exhibits any functional defects or fails post-installation testing, we replace it directly from our stocked inventory.
