Honeywell CC-PAOH01 51405039-175 HART Analog Output Module

The Honeywell CC-PAOH01 (Part Number: 51405039-175) is an 8-channel HART-enabled analog output module belonging to Honeywell’s C Series I/O portfolio, specifically designed to integrate with industrial control systems like the Experion PKS Distributed Control System (DCS) and C300 Controller. Its core function is to convert digital control signals from the controller into stable, precise 4–20 mA industrial standard current signals across 8 independent, individually configurable channels—these signals drive critical field actuators such as control valves, variable frequency drives (VFDs), and electropneumatic (EP) positioners to regulate process parameters like flow, pressure, and speed. Additionally, it natively supports the HART 7 protocol, enabling dual-mode communication over a single wire pair: transmitting the primary 4–20 mA analog control signal while simultaneously exchanging digital data for remote configuration of field devices (e.g., adjusting valve stroke time) and real-time diagnostics (e.g., monitoring valve stem wear or cable faults). To ensure reliability in harsh industrial environments, it incorporates 2500 VDC galvanic isolation (channel-to-channel and channel-to-backplane) to prevent fault propagation and signal distortion, while delivering 16-bit resolution and ±0.1% full-scale accuracy for tight process control and low drift for long-term stability. It also features comprehensive diagnostics (channel-level: open/short circuits, overloaded outputs; module-level: power supply integrity, firmware health) that transmit alerts to the Experion PKS system for proactive maintenance, and seamlessly integrates with Honeywell’s control ecosystem via the C Series backplane—supporting high-speed data transmission and hot-swap capability for minimal downtime during module replacement.

Notable Features

□Extensive self diagnostics                      □Safe-state (FAILOPT) behaviors configurable on a per channel                                                                                              basis

□Optional redundancy                              □Output read-back and alarm on discrepancy

□HART-capable, multivariable                □Non-incendive output

instruments

□Multiple modems for fast collection 

of control variables

FAILOPT 

Series C AO module supports the FAILOPT parameter on a per channel basis. The user can configure 

each channel to either HOLD LAST VALUE, or SHED to a SAFE VALUE. The Output will always go to 

zero, the safe state, if the IOM device electronics fails.