ABB 3BHE012276R0101 UAD143A101 PCB Board – Internal Circuit Board for S800 I/O AI843 16-Channel Analog Input Module

Product Overview

The ABB 3BHE012276R0101 (UAD143A101) is the internal printed circuit board assembly of the ABB AI843 analog input module, belonging to ABB’s S800 I/O distributed I/O platform and widely deployed within ABB Symphony Plus DCS and System 800xA architectures. While the AI843 module is the field-facing unit that mounts on an S800 I800 rack / SDCS-PIN-48 series base (e.g. 3BSE004939R1012), the ABB UAD143A101 PCB is the core signal-conditioning and conversion engine inside that module — and is separately stocked as a spare / service-replacement board for maintenance teams who repair AI843 units rather than replacing the whole module.

Functionally, the ABB 3BHE012276R0101 PCB carries 16 independently isolated analog input channels, each with its own 16-bit ADC, supporting software-configurable signal types on a per-channel basis: 4–20 mA, 0–10 V, RTD (Pt100/Pt1000/Cu10 etc.) and thermocouple (TC, Types J/K/T/E/S/B/R/N). This eliminates the traditional need for separate AI, RTD and TC card types — a single ABB UAD143A101 PCB-equipped AI843 can mix pressure transmitters on the first eight channels and temperature probes on the last eight, all within one 16-channel envelope. Channel-to-channel and channel-to-bus isolation exceed 2.5 kV RMS, suppressing ground loops and common-mode noise in multi-earthed plant layouts.

The ABB 3BHE012276R0101 operates from the S800 I/O backplane 24 V DC supply, draws ≤15 W, and supports HART transparent pass-through on each channel so that HART-enabled field instruments can be polled from the control system or handheld communicator without extra wiring. Integration with ABB Control Builder Plus auto-detects the module, exposing channel-level forcing, scaling, open-sensor detection and diagnostic states. For asset managers, stocking the ABB UAD143A101 PCB as a line-spares item extends AI843 service life at roughly one-third the cost o

Description

Technical Specifications

Parameter	Value
Product Model	ABB 3BHE012276R0101 (PCB ID: UAD143A101)
Manufacturer	ABB
Product Type	PCB Circuit Board Assembly (for S800 I/O AI843 Analog Input Module)
Parent Module	ABB AI843 (16-channel Analog Input, S800 I/O)
Signal Types (per channel, SW-configurable)	4–20 mA, 0–10 V, RTD (Pt100/Pt1000/Cu10/Cu100/Ni100), TC (J/K/T/E/S/B/R/N)
Number of Channels	16 analog input channels
ADC Resolution	16 bit
Conversion Accuracy	≤ ±0.1% of span
Channel Isolation	> 2.5 kV RMS (channel-to-bus, channel groups)
HART Support	HART 5/6/7 transparent pass-through (all channels)
Operating Voltage	24 V DC (backplane, via S800 base)
Power Consumption	≤ 15 W (typical, full 16-ch load)
Communication (to controller)	S800 I/O internal bus (via SDCS-PIN-48 base)
Operating Temperature	–5 °C to +60 °C (module level); PCB storage –40 °C to +85 °C
Enclosure / Mounting	Plugs into AI843 housing; AI843 mounts on S800 rack / DIN rail via base
Standards	CE, UL, RoHS, IEC 61131-2, ABB S800 I/O mechanical/electrical spec
Compatible Base	SDCS-PIN-48-S/D series (e.g. 3BSE004939R1012)

Main Features and Advantages

Software-configurable universal analog inputs:

The ABB 3BHE012276R0101 (UAD143A101) PCB gives each of its 16 channels an independent 16-bit ADC and its own signal-conditioning front end, so the AI843 can be software-tasked at the channel level — e.g. Ch1–Ch8 as 4–20 mA pressure transmitters, Ch9–Ch12 as Pt100 RTDs, Ch13–Ch16 as K-type TCs — without jumper changes or hardware variants. For spare planners this collapses three card types (AI, RTD, TC) into one stock-keeping unit, reducing obsolescence and shelf diversity.

Channel-grade electrical isolation:

Each channel group on the ABB UAD143A101 PCB is galvanically isolated from the backplane and from neighbouring groups at >2.5 kV RMS. In plants where field sensors land on different earth grids (turbine island vs. boiler island, or skid-mounted packages tied to local ground rods), this isolation stops ground-loop currents and prevents a fault on one channel from propagating to others — a frequent pain point with non-isolated or group-isolated-only designs.

HART transparent pass-through:

All 16 channels on the ABB 3BHE012276R0101 PCB carry HART superimposed on the 4–20 mA loop, passed transparently to the controller and to HART multiplexer / handheld tools. This enables wired HART device diagnostics, valve positioner parameterisation and calibration checks without breaking into the loop or adding HART modems at the rack — a strong advantage in FDA/GMP-regulated pharma or in remote oil & gas wellpad I/O where truck rolls are expensive.

Deep 800xA / Symphony Plus integration:

When the ABB UAD143A101 PCB is seated inside its AI843 housing on an base, Control Builder Plus auto-enumerates the module, exposes channel-level forced-value, scaling, open-sensor detection, wire-break alarms and ADC self-test results in the standard diagnostic tree. No GSD/editing, no third-party mapping layers — it’s native. For legacy Symphony Plus retrofits migrating toward 800xA, the ABB 3BHE012276R0101 PCB gives a drop-in signal path that doesn’t force rewiring the field side.

Service-friendly spare form factor:

Because the ABB 3BHE012276R0101 is sold as the bare PCB assembly (rather than a cased module), maintenance shops with component-level repair capability can swap a damaged UAD143A101 into a harvested shell, re-calibrate and return the module to stock — cutting lead-time versus ordering a fresh from ABB and avoiding the waste of scrapping an otherwise-good housing, connector and labelling. For plants under cost-pressure, this is the pragmatic mid-life strategy.