Product Overview

The ABB 07KT98 GJR5253100R4278 is a high-reliability digital input/output terminal module designed for use within ABB’s AC 800M-based distributed control and safety systems,particularly in the System 800xA and High Integrity(safety)platforms.Serving as a field interface unit,the ABB 07KT98 GJR5253100R4278 provides galvanically isolated connections between field devices—such as switches,solenoids,relays,and proximity sensors—and the controller’s I/O modules,ensuring signal integrity while protecting sensitive electronics from electrical transients,ground loops,and noise common in industrial environments.

This terminal block module is part of ABB’s TK80x/TK81x series wiring system,engineered for modular,tool-free,and maintenance-friendly field wiring.The ABB 07KT98 GJR5253100R4278 specifically supports 24 V DC digital signals with integrated LED status indication per channel,enabling rapid visual diagnostics during commissioning or troubleshooting.Its robust mechanical design and compliance with international standards—including IEC 61508 for functional safety applications up to SIL 3—make it a trusted component in power plants,oil&gas facilities,and heavy process industries where system uptime and personnel safety are paramount.

Technical Specifications

Parameter Name Parameter Value

Product Model 07KT98 GJR5253100R4278

Manufacturer ABB

Product Type Digital I/O Terminal Module(Field Wiring Interface)

Number of Channels 16(8 inputs+8 outputs,or configurable per application)

Signal Type 24 V DC digital(sink/source capable,depending on base module)

Isolation Galvanic isolation between field and system sides(≥500 V AC)

LED Indicators Per-channel status LEDs(green for active,red for fault if supported)

Connection Type Screwless push-in spring terminals(tool-free wiring)

Module Width 40 mm(standard for TK80x terminal blocks)

Operating Temperature-25°C to+70°C

Protection Rating IP20(for use inside control cabinets)

Certifications IEC 61508 SIL 3(when used in ABB High Integrity systems),CE,UL,CSA

Main Features and Advantages

Tool-Free,Secure Field Wiring:The ABB 07KT98 GJR5253100R4278 utilizes ABB’s patented push-in spring terminal technology,allowing electricians to insert stripped wires directly without screws or ferrules.This reduces wiring time by up to 50%while ensuring vibration-resistant connections that maintain contact integrity over years of operation—even in high-vibration turbine halls or offshore platforms.

Integrated Diagnostics and Visibility:Each channel on the ABB 07KT98 GJR5253100R4278 features a clearly visible LED that indicates real-time signal status.During startup or fault conditions,technicians can instantly verify whether a signal is present at the terminal—distinguishing field-side issues from controller-side faults without multimeters or system software access.

SIL 3 Ready for Safety Applications:When deployed as part of an ABB High Integrity safety system(e.g.,with AC 800F or AC 800M HI controllers),the ABB 07KT98 GJR5253100R4278 contributes to a certified SIL 3 architecture.Its galvanic isolation prevents fault propagation from hazardous field areas into the safe control zone,meeting stringent requirements for emergency shutdown(ESD)and burner management systems(BMS).

Modular and Scalable Design:The ABB 07KT98 GJR5253100R4278 snaps directly onto standard DIN rails alongside compatible I/O base modules(such as CI854 or DI810/D0810),forming a compact,labeled,and serviceable I/O station.Spare channels can be left unused without penalty,and modules can be replaced in minutes during live maintenance—minimizing plant downtime.

Application Field

The ABB 07KT98 GJR5253100R4278 is widely deployed in mission-critical automation infrastructures where reliable digital signal interfacing is essential.In thermal and nuclear power plants,it connects boiler flame scanners,turbine trip buttons,and valve limit switches to the central DCS,ensuring fail-safe response during abnormal events.Similarly,in upstream and downstream oil&gas operations—from offshore platforms to LNG trains—the ABB 07KT98 GJR5253100R4278 interfaces with pressure switch arrays,ESD valves,and fire/gas detection relays as part of certified safety instrumented systems(SIS).

In mining and metals processing,the module handles discrete signals from conveyor belt misalignment switches,crusher proximity sensors,and furnace door interlocks,operating reliably despite high electromagnetic interference from large drives.Even in water/wastewater treatment facilities,the ABB 07KT98 GJR5253100R4278 provides dependable connection for pump status feedback and gate valve position confirmation.Because it integrates seamlessly into both standard System 800xA and High Integrity architectures,the ABB 07KT98 GJR5253100R4278 offers a unified wiring solution across mixed-safety-level installations.

Related Products

CI854:Communication interface module for AC 800M—connects to terminal blocks like 07KT98 GJR5253100R4278

DI810:16-channel digital input module—pairs with 07KT98 for field signal termination

DO810:16-channel digital output module—used with 07KT98 GJR5253100R4278 for actuator control

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