ABB 07KT98C GJR5253100R028 | AC31 PLC Central Processing Unit, Refurbished Available

Description

Key Technical Specifications

Product Introduction

The ABB 07KT98C GJR5253100R028 is a basic control unit belonging to the ABB Advant Controller 31 (AC31) series. It serves as the central processing unit for AC31-based PLC systems, executing control logic, processing digital and analog I/O signals, and coordinating with distributed I/O modules via the CS31 system bus. The “C” suffix and the order number GJR5253100R028 identify a specific revision within the 07KT98 family, which may differ from related variants such as 07KT98 GJR5253100R0260 (Ethernet-equipped) or 07KT98 GJR5253100R0278/R4278 (analog I/O variants).

The AC31 platform is a mature ABB product line widely deployed in process industries, discrete manufacturing, and machine control applications. The 07KT98 family represents the higher-performance tier of basic units, typically offering integrated digital I/O, analog I/O capability, high-speed counter inputs, and serial communication ports supporting Modbus. The CS31 bus enables expansion with remote I/O racks and communication couplers, providing flexibility for distributed control architectures.

Because this is a legacy ABB component, exact revision matching is critical. The 07KT98 family includes multiple order numbers with different I/O configurations, communication interfaces, and firmware versions. A physically similar unit with a different suffix or order number may not be a drop-in replacement.

ABB 07KT98C GJR5253100R028

QA/QC Transparency SOP

1. Intake & Origin Verification: Confirm the physical label reads ABB 07KT98C GJR5253100R028. Photograph the front label, revision code, serial number, and connector face.
2. Visual Inspection: Inspect DIN-rail mounting clips, terminal blocks, communication ports, LED indicators, and PCB surface. Reject units with cracked connectors, corrosion, burnt components, or damaged terminal blocks.
3. Power-Up Test: Apply 24 VDC in a controlled test fixture. Verify normal power-up sequence, RUN/STOP LED indicators, and absence of fault codes.
4. I/O Verification: Test digital input channels with 24 VDC signals. Verify digital output actuation. Test analog I/O channels if present and applicable to the revision.
5. Communication Check: Test CS31 bus communication with a compatible I/O module or coupler. Verify serial port functionality (Modbus master/slave) where test equipment is available.
6. Final Packaging: Label with model, order number, revision, test status, and date. Pack in ESD-safe packaging with rigid support to prevent connector damage.

Field Engineer Gotchas

• Revision matching is critical. The 07KT98 family includes multiple order numbers (R0260, R0270, R0278, R4278, R028, etc.) with different I/O configurations and communication interfaces. The “C” suffix and GJR5253100R028 order number identify a specific variant — verify against your installed unit before procurement.
• Not interchangeable with 07KT97. The 07KT97 is a related but distinct basic unit with different performance characteristics and I/O mapping. Do not substitute 07KT97 for 07KT98 without verified compatibility.
• Third-party listing accuracy varies. Some surplus listings conflate 07KT98 variants or misattribute specifications from different order numbers. Always verify against the physical label on the unit you are purchasing.
• CS31 bus addressing must match. When replacing a failed unit, the new module must be configured with the same CS31 station address and communication parameters as the original to integrate seamlessly with existing remote I/O.
• Firmware and program backup. Before swapping a failed unit, ensure you have a backup of the PLC program. The 07KT98C may require firmware loading or program download after replacement, depending on the revision and memory configuration.
• Legacy platform sustainment. The series is a mature/legacy ABB product line. For new deployments, consider migration to ABB’s current PLC platforms (e.g., AC500). For existing installations, verified surplus and refurbished channels remain the primary supply source.

ABB 07KT98C GJR5253100R028

Application Scenarios

• A manufacturing plant running an -based machine control system experiences CPU module failure. Replacing the 07KT98C restores PLC logic execution without migrating the entire control system.
• Process control backup spare. A chemical processing facility maintains a spare 07KT98C for its -based batch control system. The verified surplus unit is pre-configured and ready for emergency swap during unplanned downtime.
• Machine builder OEM support. An OEM that originally deployed controllers on legacy equipment needs replacement CPUs for field service. The 07KT98C provides a like-for-like replacement for warranty and maintenance support.
• An station managing remote I/O racks via bus loses its CPU. Replacing the 07KT98C restores communication with all connected I/O modules and process control execution.

FAQ

What is the ABB 07KT98C GJR5253100R028?
It is a basic control unit (PLC CPU module) for the ABB Advant Controller 31 () series, executing control logic and managing I/O and communication tasks.

Is it compatible with other 07KT98 variants?
Partial compatibility exists within the 07KT98 family, but exact order number and revision matching is recommended. Variants differ in I/O configuration, communication interfaces, and firmware. Verify specifically against your installed unit.

What I/O does it support?
The 07KT98 family typically includes 24 digital inputs, 16 digital outputs, and optional analog I/O (up to 8 AI / 4 AO depending on variant). The exact configuration of the 07KT98C should be verified against the physical unit or ABB documentation.

Is this module still in production?
The series is a mature/legacy ABB product line. Availability is primarily through surplus and refurbished channels. For new deployments, consider ABB’s current AC500 platform.

What should I check before buying?
Request photos of the ABB label showing model (07KT98C), order number (), revision code, and terminal block configuration. Confirm whether the unit has been functionally tested, including bus communication and I/O verification.