Description
ABB 07KT97 (GJR5253000R4270) – AC31 CPU Module for Reliable Legacy Control and Brownfield Upgrades
ABB’s 07KT97, part code GJR5253000R4270, is a controller CPU from the AC 31 family. From my experience, this is the piece maintenance teams look for when an existing AC 31 rack needs a like‑for‑like brain swap without touching field wiring or changing the cabinet layout. You might notice it slots into the standard AC 31 base and talks to expansion I/O over the native backplane, so recovery during a tight outage is typically straightforward.
Company’s Order Placement Process and Guarantees
- Warranty period: 365 days
- Delivery time: 1 week for in‑stock; no more than one month at the latest
- Payment method: 50% advance payment, full payment for delivery
- Express delivery methods: FedEx, UPS, DHL
- Process: Confirm model and quantity → Proforma Invoice → Advance payment → Functional testing and packing → Final payment → Express shipment with tracking
Key Features
- Drop‑in AC 31 CPU – Like‑for‑like replacement to restore a rack with minimal engineering effort.
- Backplane integration – Communicates with AC 31 expansion I/O over the native bus; field terminations stay on existing bases.
- Built‑in serial ports – Typically includes RS‑232/RS‑485 for programming and device links (S‑Bus/Modbus in many cases).
- Deterministic control – Stable scan behavior for small to mid‑size machines and utilities panels.
- Service‑friendly – Front diagnostics and simple power‑up checks make outage work predictable.
Technical Specifications
| Brand / Model | ABB – 07KT97 (GJR5253000R4270), AC 31 CPU module |
| HS Code | 853710 (Programmable controller modules) |
| Power Requirements | Typically 24 VDC supplied via the AC 31 base/backplane |
| Dimensions & Weight | DIN‑rail module, standard AC 31 footprint; ~0.4–0.6 kg class (typical) |
| Operating Temperature | 0…55 °C cabinet ambient (typical for ABB PLC hardware) |
| Signal I/O Types | Backplane interface to AC 31 I/O; local/expansion I/O handled via base modules; optional on‑CPU serial ports for devices/programming |
| Communication Interfaces | RS‑232/RS‑485 serial (commonly S‑Bus / Modbus RTU), programming port; no integrated Ethernet on this class of CPU |
| Installation Method | DIN‑rail on AC 31 base; plugs into the backplane with front‑accessible wiring and indicators |
Application Fields
Where this CPU typically fits in day‑to‑day work:
- Legacy AC 31 control cabinets in water/wastewater, HVAC, and utilities
- Discrete/OEM machinery where a like‑for‑like CPU swap avoids redesign
- Process skids with serial instruments and small I/O counts
- Brownfield maintenance and life‑extension projects on ABB installed bases
Advantages & Value
- Reliability: Like‑for‑like swap typically stabilizes scan behavior and clears intermittent CPU faults.
- Compatibility: Keeps the existing AC 31 base, I/O modules, and serial devices intact—no rewiring in most cases.
- Cost & downtime: Faster restoration than a full migration; minimizes qualification and documentation changes.
- Support: We can power‑up test, verify port activity/LEDs, and share a short report before shipment.
“Dropped in 07KT97 during a weekend stop. Program loaded fine, serial links came back up, and the line started on schedule.” — Controls technician, packaging OEM
Installation & Maintenance
- Cabinet setup: DIN‑rail mount on the AC 31 base; keep ventilation paths clear and follow derating guidance.
- Power & grounding: Provide clean 24 VDC; bond cabinet ground; segregate noisy loads from logic wiring.
- Programming & backups: Keep a current project backup; verify any battery‑backed memory or time‑of‑day settings if applicable.
- Serial links: Confirm RS‑232/485 polarity/termination; match baud/parity; respect shield/drain wiring practices.
- Handling & safety: Power down before removal/insertion; ESD protection when handling the CPU and connectors.
- Routine care: Quarterly dust removal, connector reseat checks, and periodic review of diagnostic/event logs.
Quality & Certifications
- Quality system: Manufactured under ISO 9001 processes (typical for ABB PLC hardware).
- Compliance: Suitable for CE/UL compliant industrial control panels; RoHS status depends on production year.
- Warranty: 365‑day warranty from shipment date.
Share your AC 31 rack layout, connected I/O bases, and any serial device details (protocol and baud), and we’ll confirm 07KT97 (GJR5253000R4270) compatibility and prepare a brief functional test record before dispatch.
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