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CC-PAIH51 51410069-275 is a Honeywell Series C high-level analog input module with HART.
For replacement, match CC-PAIH51 51410069-275, the hardware revision, connectors, installed position and receiving-system configuration.
CC-PAIH51 is the Series C high-level analog input IOM for sixteen single-ended current channels with HART support. Honeywell specifies two-wire or self-powered transmitters and a 4-20 mA-only input range through 200 ohms. It provides 16-bit conversion, scans inputs every 50 ms, and supports HART configure and status communication plus collection from multivariable HART instruments. Differential and voltage input modes are explicitly excluded for this model.
The installed IOTA and redundancy arrangement are part of the hardware identity. CC-TAIX51 is the nonredundant IOTA and CC-TAIX61 is the redundant IOTA. Individually protected current-limiting circuits provide transmitter field-power conditioning for the documented Class I, Division 2 non-incendive arrangement without separate channel fusing. Preserve channel allocation, loop power, shielding, grounding, HART device assignments and the approved control database during replacement.
Use CC-TAIX51 for a nonredundant installation or CC-TAIX61 for a redundant installation. The nominal 6-inch and 12-inch values apply to those IOTA assemblies, not to the CC-PAIH51 module or shipping carton. Verify keying, field terminals, redundant partner and the exact installed IOTA before replacement.
The documented execution accepts sixteen single-ended 4-20 mA current inputs through 200 ohms and supports HART configure and status functions. Do not apply differential-input or voltage-input capabilities from other Series C models. Confirm transmitter type, loop power, shielding, grounding and configured engineering range channel by channel.
Honeywell specifies individually protected current-limiting circuits for Class I, Division 2 non-incendive transmitter interfacing, with no separate channel fusing required in the documented arrangement. Confirm the hazardous-location design, cabinet power architecture and receiving-country approvals before treating this statement as an installation authorization.
Configure the installed hardware as sixteen single-ended 4-20 mA current inputs. Confirm whether each transmitter is two-wire or self-powered, preserve the 200-ohm input-path basis and verify protected field-power wiring. Pair the module with CC-TAIX51 for nonredundant service or CC-TAIX61 for redundant service; the IOTA model, terminal map and redundancy arrangement must all match the approved design.
Record the channel database, transmitter tags, HART device assignments, loop-power source, shielding, grounding and alarm behavior before removal. After installation, verify module status, input quality, the 50 ms scan behavior and HART communication. Prove each loop with a traceable current source and confirm device status before returning affected control strategies to automatic operation.