8C-TAOX51 Honeywell C300 4-20mA AO Module with Relays

Product Overview

The Honeywell 8C-TAOX51 (Part Number: 51306983-175) functions as a high-performance analog output interface within the Experion PKS Series 8 I/O family. This module converts digital commands from the C300 controller into precise 4–20 mA current signals to drive critical field assets including control valves, actuators, and dampers. We provide this unit as 100% Brand New original hardware, designed to maintain loop integrity in mission-critical DCS environments. It uniquely integrates auxiliary relay outputs, combining proportional control and discrete interlocking in a single high-density footprint.

Technical Specifications

Engineering Advantages

• Dual-Functionality Control: The 8C-TAOX51 eliminates the need for separate relay modules by incorporating two Form C (SPDT) relays directly onto the board. This allows engineers to manage proportional valve positioning and discrete safety interlocks or alarm lamps through a single I/O slot.

• Optimized for Series 8 IOTA: This module snaps directly into standard Honeywell IOTA terminal assemblies. This vertical-mount design significantly reduces cabinet depth requirements and simplifies field wiring by separating the active electronics from the termination points.

• Superior Signal Linearity: The digital-to-analog conversion circuitry provides highly linear 4–20 mA outputs. This precision ensures that actuators respond exactly to controller setpoints, reducing process oscillation and improving overall plant efficiency.

• Industrial-Grade Resilience: Honeywell built the 8C-TAOX51 to withstand the rigors of industrial process floors. The module resists high-vibration environments and utilizes coated circuitry to protect against dust and moisture ingress, preventing premature component failure.

• RS-485 Diagnostic Link: The integrated RS-485 interface supports real-time data exchange and internal diagnostics. It monitors output loop health and relay status, reporting faults to the Experion PKS system to prevent undetected control failures.

FAQs

• How does the 8C-TAOX51 handle power loss?

  The module requires a stable 12–24 V DC supply. In the event of power loss, the analog output typically drops to a fail-safe state (0 mA), and the SPDT relays return to their de-energized positions. Always verify your specific fail-safe software configuration in Experion PKS.

• Can I install this module in a standard C300 rack?

  The 8C-TAOX51 specifically targets the Series 8 hardware platform. You must install it on a compatible Series 8 IOTA (Input Output Termination Assembly) rather than the older horizontal High-Performance Process Manager (HPM) racks.

• What type of loads can the auxiliary SPDT relays switch?

  The Form C relays target auxiliary control tasks. While they provide robust switching, always consult the specific Honeywell load rating for the 51306983-175 to ensure the connected solenoids or alarms do not exceed the relay’s contact current limits.

• Does this part number include the IOTA termination base?

  The 51306983-175 part number refers to the active 8C-TAOX51 electronic module only. The IOTA baseplate is a separate component tailored to your specific cabinet wiring requirements.