Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Module | 07KT97 (WT97) |
| Order Number | GJR5253000R4270 |
| Product Family | AC31 / Advant Controller 31 |
| Processor | 32-bit RISC |
| User Program Memory | 480 KB |
| User Data Memory | 256 KB (Flash EPROM) |
| Digital Inputs | 24 × 24 VDC, three isolated groups of 8 |
| Digital Outputs | 16 × transistor, two isolated groups of 8 |
| Configurable DI/DO | 8 channels, configurable as digital I/O |
| Analog Inputs | 8 channels, configurable (0–10 V, 0–5 V, ±10 V, ±5 V, 0–20 mA, 4–20 mA, Pt100, differential; some variants also support digital input reassignment) |
| Analog Outputs | 4 channels, configurable (0–10 V, 0–20 mA, 4–20 mA) |
| Counters | 2 × high-speed counters up to 50 kHz |
| System Bus | CS31 (built-in master, up to 31 remote stations) |
| Communication | COM1 / COM2 serial (RS-232/RS-485, Modbus capable); Ethernet on R4270 variant; optional couplers 07KP90, 07KP93, 07MK92 |
| Programming | 907 AC 1131 |
| Memory Medium | SmartMedia card |
| Battery | 07LE90 lithium battery for data retention |
| Power Supply | 24 VDC (±20%) |
| Mounting | DIN-rail / compact AC31 rack |
| Operating Temperature | Typically -20°C to +60°C (verify against nameplate) |
Product Introduction
The ABB 07KT97 GJR5253000R4270 is a compact PLC basic unit in the AC31 / Advant Controller 31 family. Unlike a pure communication card or a rack-mounted Advant OCS processor, the 07KT97 is a self-contained controller with integrated digital and analog I/O, a CS31 system bus master, serial ports, and — in the R4270 revision — an Ethernet interface.
Its engineering value comes from consolidation: one module handles local I/O, CS31 remote station management, serial device integration, and Ethernet connectivity. That makes it useful in brownfield installations where adding separate I/O racks or external gateways would be impractical. Typical uses include small process skids, auxiliary plant systems, legacy machine control, and AC31-based subsystems that must exchange data with SCADA or higher-level controllers.
Because the 07KT97 line is obsolete, replacement risk is real. The R4270 suffix is not cosmetic; it signals Ethernet capability that earlier revisions may lack. Program memory, CS31 addressing, serial/Modbus mapping, and SmartMedia card contents must all be preserved or restored during replacement.
QA/QC Transparency SOP
- Identity Verification — Confirm 07KT97 and GJR5253000R4270 on the label. Record revision, serial number, and firmware version. Reject units with damaged DIN-rail latches, burnt connectors, or illegible markings.
- Memory and Battery Check — Inspect the SmartMedia card slot and 07LE90 battery. A depleted battery can cause data loss even if the CPU powers up.
- Power-Up Test — Apply 24 VDC and verify RUN/STOP LEDs, fault indicators, and SmartMedia card recognition.
- I/O Functional Check — Verify a sample of DI, DO, AI, and AO channels. Confirm analog scaling, polarity, and output drive capability.
- Communication Verification — Test CS31 bus presence, serial port response, and Ethernet link. Confirm that the Ethernet variant matches the original system architecture.
- Final Documentation — Ship with label photos, revision confirmation, memory card status, battery condition, and test summary. Units tested without full I/O validation should be marked “partial test.”
Field Engineer Gotchas
- 07KT97 is a PLC CPU, not just a communication module. It integrates DI/DO/AI/AO, CS31 bus, serial ports, and optional Ethernet.
- GJR5253000R4270 ≠ GJR5253000R0200. The R4270 revision is commonly associated with Ethernet capability; R0200 is the standard variant.
- Advant Controller 31 ≠ Advant OCS rack modules. Do not confuse 07KT97 with Advant OCS backplane cards such as DSTC, DSTD, or 07KP90.
- SmartMedia card and battery are critical. A replacement CPU without the original program card or with a dead battery will not restore operation.
- Remote I/O station addresses and bus parameters must match the original configuration.
- Analog channels are configurable. AI/AO ranges and DI/DO reassignment must be verified against the original program.
- Ethernet behavior is revision-dependent. Not every 07KT97 supports Ethernet; confirm the R4270 marking and test the port.
ABB 07KT97 GJR5253000R4270
Application Scenarios
- Legacy AC31 CPU replacement — A failed 07KT97 is replaced with a verified GJR5253000R4270 unit to restore local I/O and bus control.
- Ethernet-enabled retrofit — An existing AC31 system requires Ethernet connectivity for SCADA or HMI integration without adding external gateways.
- Small process skid controller — Uses integrated DI/DO/AI/AO and to control pumps, valves, temperature loops, and remote I/O stations.
- Brownfield holdover support — Keeps an aging installation operational while migration to AC500 or AC800M is planned.
FAQ
What is ABB 07KT97 GJR5253000R4270?
It is an ABB / Advant Controller 31 compact PLC basic unit with integrated I/O, bus, serial ports, and Ethernet connectivity in the R4270 revision.
Is it the same as GJR5253000R0200?
No. R0200 is the standard 07KT97 variant. is commonly identified as the Ethernet-enabled version.
Does it have built-in I/O?
Yes. It typically provides 24 DI, 16 DO, 8 configurable AI, 4 AO, and 8 configurable DI/DO channels.
What programming software is used?
907 AC 1131.
Is it still available new from ABB?
The 07KT97 family is legacy/obsolete. Most supply comes from surplus, refurbished, or remaining stock.
What should I verify before buying?
Full order number (), revision, SmartMedia card contents, battery condition, Ethernet port functionality, configuration, and I/O test results.
