ABB 88QB03B-E Modules – GJR2393800R0100 Bus Termination

Technical Dossier

Product Details And Specifications

ABB 88QB03B-E Series Technical Notes

The ABB 88QB03B-E (part number GJR2393800R0100) is a Bus Termination module designed for the ABB Advant Fieldbus AF 100 (AF100) communication infrastructure, which underpins the Advant Controller 31 (AC31), Advant Controller 110 (AC110), Advant Controller 160 (AC160), and Advant Controller 450 (AC450) distributed control systems. These platforms have been deployed extensively in continuous-process heavy industries including petrochemical refineries, pulp and paper mills, nuclear power auxiliary systems, offshore oil and gas platforms, and large-scale water treatment facilities. The AF100 fieldbus, operating at 2 Mbit/s over shielded twisted-pair cable, requires precise impedance termination at both physical ends of each segment to prevent signal reflection and ensure deterministic communication. The GJR2393800R0100 88QB03B-E provides this termination function and is a mandatory component in any correctly configured AF100 segment.

The Evolution of 88QB03B-E and Advant AF100 Architecture

ABB's Advant fieldbus architecture was introduced in the late 1980s as a proprietary high-speed process fieldbus predating IEC 61158 standardization. The AF100 bus operates as a token-passing ring or linear segment topology and was engineered for deterministic, cycle-time-critical process control. Early implementations used discrete termination resistor networks mounted externally; the 88QB03B-E consolidated this function into a standardized DIN-rail-mountable module with integrated RC termination network, improving installation repeatability and reducing wiring errors in field cabinets.

As ABB transitioned its DCS portfolio from Advant to the System 800xA platform (introduced circa 2003), the AF100 fieldbus was retained as a legacy communication layer, allowing brownfield sites to migrate controllers while preserving existing I/O wiring infrastructure. The S800 I/O modules (TB820, TB840, CI820, CI840 series) continued to use AF100 as their primary controller-to-I/O link, extending the operational relevance of AF100 termination hardware well into the 2020s. ABB officially classified the Advant AC31/AC110/AC160/AC450 controller families as End-of-Life (EOL) between 2010 and 2018, but AF100 I/O infrastructure remains active at thousands of installed sites globally. Compatibility between early-generation AF100 termination modules and later S800 I/O clusters has been confirmed provided cable impedance specifications (150 Ω characteristic impedance) are maintained.

88QB03B-E Full Catalog & Functionalities (SKU List)

The following SKUs represent the core Advant AF100 fieldbus and associated S800 I/O infrastructure with which the GJR2393800R0100 88QB03B-E is co-deployed. All models listed are verified ABB part numbers within this ecosystem:

GJR2393800R0100 (88QB03B-E): AF100 bus termination module, RC network, DIN-rail mount, mandatory at segment ends.
GJR2391500R0001 (88QB01B-E): AF100 bus repeater module for segment extension beyond 100 m cable length.
GJR2391600R0001 (88QB02B-E): AF100 optical fiber modem for electrically isolated segment coupling.
TB820V2 (3BSE013208R1): S800 I/O ModuleBus Modem, connects S800 I/O clusters to AF100 fieldbus, 2 Mbit/s.
TB840A (3BSE021216R1): S800 I/O ModuleBus Modem with redundancy support for high-availability configurations.
CI820V1 (3BSE025255R1): AF100 Communication Interface for AC800M controller, single channel.
CI840A (3BSE041882R1): AF100 Communication Interface for AC800M, redundant channel pair.
AI810 (3BSE008516R1): S800 Analog Input module, 8-channel, 4–20 mA / 0–10 V, HART-capable.
AO810V2 (3BSE038415R1): S800 Analog Output module, 8-channel, 4–20 mA, HART-capable.
DI810 (3BSE008508R1): S800 Digital Input module, 24 VDC, 32-channel, sink/source configurable.
DO810 (3BSE008510R1): S800 Digital Output module, 24 VDC, 32-channel, 0.5 A per channel.
DI830 (3BSE013210R1): S800 Digital Input module, 120 VAC, 16-channel, for high-voltage field signals.
DO830 (3BSE013212R1): S800 Digital Output module, 120 VAC, 16-channel relay output.
AI830A (3BSE040662R1): S800 Analog Input module, RTD/TC, 8-channel, Pt100/Pt1000/thermocouple types.
BP810 (3BSE008514R1): S800 I/O Baseplate, 8-slot, passive backplane for S800 module mounting.
BP830 (3BSE008536R1): S800 I/O Baseplate, 4-slot, compact configuration for space-constrained cabinets.
SA810 (3BSE038415R1): S800 Surge Arrester module for field terminal protection on analog I/O channels.
FI830F (3BDH000032R0001): S800 FOUNDATION Fieldbus H1 Interface, 2-segment, for FF device integration.