8C-PAIM01 51454358-175 Honeywell C300 Temperature Input Module

Configured for multi-point thermocouple and RTD signal acquisition in Honeywell Experion PKS C300 systems, the Honeywell 8C-PAIM01 (8C-PAIM01 Temperature Input Module) provides direct physical/electrical execution.

Hardware Specifications

Cold Junction Compensation & Loop Integrity

The 8C-PAIM01 utilizes onboard Cold Junction Compensation (CJC) circuits to dynamically calibrate low-level millivolt inputs across all supported thermocouple types. Galvanic channel-to-channel isolation and EN 61000-4-5 compliant surge protection insulate the C300 backplane logic from line transients and common-mode electrical noise. Interfacing seamlessly with 4-20 mA HART loop protocol instrument networks, the module executes continuous Open Thermocouple Detection (OTD) during each scan cycle to isolate broken sensor loops without interrupting adjacent process measurement channels.

Frequently Asked Questions

Q: Can different thermocouple types be wired simultaneously to channels on the same 8C-PAIM01 module?

A: Yes, each isolated input channel can be independently assigned and scaled for specific thermocouple types or RTD sensors within the Experion PKS software environment.

Q: How does the 8C-PAIM01 respond when a thermocouple wire breaks in the field?

A: Onboard Open Thermocouple Detection (OTD) detects the open circuit during the scan cycle and immediately marks the Process Variable (PV) as invalid, preventing the C300 controller from reacting to corrupted signals.

Field Installation Guidelines

1. Power down the Series 8 module carrier before inserting or extracting the 8C-PAIM01 card to avoid backplane bus disturbances.
2. Terminate all thermocouple and RTD signal conductors using shielded twisted-pair cables, ensuring shield drain wires are grounded at a single earth bar.
3. Verify that panel layout provides adequate vertical air clearance to support natural convection cooling across the conformal-coated circuit components.
4. Secure module retention latches firmly to establish reliable backplane contact and mechanical chassis ground connection.