Overview
Manuals
IOM Compatibility
Current Signal Limits
Digital Channel Use
Features:
- Non-redundant UIO-2 termination assembly with one matched IOM position and 32-channel system capacity.
- Honeywell explicitly lists DC-TUIO31 with CC-PUIO31 in the UIO-2 compatibility table; the board does not perform standalone signal processing.
- The existing close-up verifies part number 51307772-176; field terminals and configured signal modes must be checked separately from the board identity.
The DC-TUIO31 51307772-176 is the non-redundant termination assembly in a Honeywell UIO-2 installation, providing the physical field interface and mounting connection for one compatible IOM. Honeywell's September 2024 compatibility table explicitly pairs DC-TUIO31 with CC-PUIO31. The existing product photograph independently confirms the non-redundant designation and board part number. Its TB1 and TB2 terminal groups serve the field connections, while the installed electronic module performs the channel processing and configuration required by the control application.
The UIO-2 system can combine analog and discrete duties, but universal does not mean every sensor can be wired directly. The documented analog-input interface accepts 0–20 mA or 4–20 mA current; voltage sources, thermocouples, RTDs and NAMUR devices need suitable external conversion or interfacing. Analog outputs provide configured current commands, and digital-output loading must remain within the matched IOM's limits. Preserve the field wiring, channel assignments and required terminal components during replacement, and verify each affected loop before returning the installation to service.
The DC-TUIO31 51307772-176 Honeywell Non-Redundant Universal I/O Termination Assembly may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell DC-TUIO31 51307772-176 official technical documentation and product links.
This multi-page Honeywell technical document contains the exact model and its technical data. Apply the values to the supplied type number and verify its revision before installation.
Honeywell lists DC-TUIO31 as an IOTA paired with the CC-PUIO31 UIO-2 module. The pictured board is marked non-redundant and has one IOM position. A redundant arrangement needs its designated hardware; adding another module or choosing a similar suffix does not convert this board. Check the complete ordering code, revision and approved system configuration before replacement.
For the matched UIO-2 system, analog inputs accept 0–20 mA or 4–20 mA and analog outputs provide 4–20 mA commands. Direct voltage, thermocouple, RTD and NAMUR inputs are outside the documented current-input interface. Select suitable external conditioning where required and verify transmitter power, common reference and channel configuration before connecting field devices.
A configured UIO-2 digital-output channel can supply up to 0.5 A under the applicable system conditions. Digital-input open-wire detection requires the specified field resistor arrangement and configuration. These functions belong to the assembled IOM/IOTA system, not the bare board. Follow the approved wiring and release-specific instructions; do not assume that terminal appearance determines signal mode.
