8C-PAIHA1 | Series 8 HART Analog Input (16-Channel, Single-Ended, Coated)

8C-PAIHA1 is Honeywell’s coated Series 8 high-level analog input electronics module with HART. It accepts 16 single-ended 4–20 mA circuits and can use HART data for device status, configuration, and, where engineered, secondary or tertiary variables as process values. It is not the non-HART sibling 8C-PAINA1, and it is not the differential HART module 8C-PAIH54. Both 8C-PAIHA1 and 8C-PAINA1 mount on the same IOTA pair: 8C-TAIXA1 (6-inch non-redundant) or 8C-TAIXB1 (12-inch redundant). HKXY Instruments sources this hardware as a China industrial automation trader with 15 years of export experience, not as the OEM.

HART versus non-HART on the same IOTA

Sharing an IOTA does not make the two IOPs interchangeable. If the installed transmitters are HART devices and the control strategy uses HART variables or device status, 8C-PAINA1 is the wrong electronics module even though it fits the same termination board.

Documented input performance (S803-150-520 §4.4.2)

• Input type: current from 2-wire or self-powered transmitters
• A/D resolution: 16 bits; scan rate: 50 ms
• Hardware accuracy (at CMV = 0 V): ±0.075% of full scale at 23.5°C ±2°C; ±0.15% of full scale from 0 to 60°C
• CMRR, dc to 60 Hz (500 Ω source imbalance): 70 dB; CMV, dc to 60 Hz: −6 to +5 V peak
• NMRR at 60 Hz: 19 dB; normal-mode filter: single-pole RC, −3 dB at 6.5 Hz; crosstalk, dc to 60 Hz: −60 dB
• Maximum normal-mode input / maximum input voltage referenced to common (no damage): ±30 V
• Galvanic isolation: 1000 VAC RMS or ±1000 VDC — the specification notes this system-to-field isolation option is available only with external user-supplied power
• Isolation technique: iCoupler in the IOM
• Transmitter field power: individually protected current-limiting circuits, no fuse required; internal or external field-power selection and on-board excitation are listed
• Module removal and insertion under power: supported

If the application needs voltage or differential inputs, Honeywell points to the differential HART module 8C-PAIH54 with IOTAs 8C-TAIDA1 / 8C-TAIDB1 — a different termination family from 8C-TAIXA1.

What to confirm before you buy

• The electronics code is 8C-PAIHA1, not 8C-PAINA1 and not 8C-PAIH54.
• The IOTA is 8C-TAIXA1 or 8C-TAIXB1, matching non-redundant or redundant mounting.
• HART is actually required on the loops (status, configuration, or multivariable data).
• Coating, revision, and material number from the nameplate [TO CONFIRM].

Availability, condition, inspection, packing, and lead time are quoted per inquiry. They are not listed here.

Related Series 8 analog input pages

• 8C-PAINA1 — same IOTA family, analog input without HART
• 8C-TAIXA1 — 6-inch non-redundant AI IOTA for 8C-PAIHA1 and 8C-PAINA1
• Experion I/O spare overview

FAQ

Does 8C-PAIHA1 support HART?
Yes. That is the defining difference from 8C-PAINA1. Honeywell describes it as suitable for configure/status of HART devices and for multivariable instruments.

Can I plug it into an 8C-TAIDA1 IOTA?
No. 8C-TAIDA1 / 8C-TAIDB1 serve the differential module 8C-PAIH54. 8C-PAIHA1 uses 8C-TAIXA1 / 8C-TAIXB1.

Will it accept voltage inputs?
The official note for this module says no differential or voltage inputs are supported. Current, 4–20 mA through 250 Ω, is the documented range.

Is the 110 mA current rating a reason to reject 8C-PAINA1 as a spare?
The current ratings differ (110 mA vs 105 mA), but the practical reason to keep them separate is HART, not the 5 mA difference.

Do you publish a price here?
No. Ask for a quotation after the IOP and IOTA codes are confirmed.