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Description
Application Scenarios
In a regional water-treatment plant, the original control cabinet had been running a first-generation AC31 station for over 18 years. When the legacy CPU began to show intermittent watchdog resets during summer peak loads, the engineering team was faced with a costly choice: migrate the whole plant to a new platform, or find a reliable drop-in controller. They chose the genuine ABB 07KT97. Because the module is pin-compatible and software-compatible with the existing Advant OCS configuration, the swap was completed in under three hours with no reprogramming. Since then, the plant has logged more than 30,000 continuous operating hours without a single unplanned controller stop.Stories like this are repeated across refineries, turbine halls, paper machines and bottling lines: wherever an 07KT97 sits in the cabinet, the operation gains a controller that simply refuses to quit. Its onboard real-time clock, dual watchdog architecture and non-volatile program memory mean that even a power dip or a lightning strike rarely translates into a process shutdown.
Parameters
| Main Parameter | Value / Description |
|---|---|
| Product Model | 07KT97 (order codes GJR5253000R0200 / GJR5253000R4270) |
| Manufacturer | ABB (Asea Brown Boveri) |
| Product Category | PLC Basic Unit / Central Processing Unit |
| System Platform | Advant Controller 31 / Advant OCS |
| Processor | 32-bit high-performance microprocessor |
| User Program Memory | 128 KB RAM + 512 KB Flash (expandable via SMC memory card) |
| Data Memory | 64 KB onboard, non-volatile |
| Digital Inputs | 24 channels, 24 V DC, galvanically isolated, LED indication |
| Digital Outputs | 16 transistor outputs, 0.5 A per channel, LED indication |
| Configurable I/O | 8 channels, freely assignable as digital in/out |
| Analog Inputs | 8 channels, 12-bit, 0–10 V, ±10 V, 0–20 mA, 4–20 mA, Pt100 |
| Analog Outputs | 4 channels, ±10 V or 0–20 mA / 4–20 mA, 12-bit |
| High-Speed Counters | 2 channels, up to 50 kHz |
| Communication | CS31 system bus (master/slave), RS232 + RS485 (Modbus, programming) |
| Expansion Capability | Up to 63 CS31 slave modules |
| Real-Time Clock | Built-in, battery-backed |
| Watchdog | Hardware + software dual watchdog |
| Power Supply | 24 V DC (20.4–28.8 V), typical consumption ~8–12 W |
| Operating Temperature | 0 °C to +55 °C (some versions –20 °C to +60 °C) |
| Storage Temperature | –25 °C to +75 °C |
| Protection Class | IP20 (cabinet installation) |
| Mounting Method | 35 mm DIN rail or panel screw fixing |
| Dimensions / Weight | 240 × 140 × 85 mm / approx. 0.8 kg |
| Certifications | CE, UL, CSA, IEC 61131-2 compliant |
Technical Principles and Innovative Values
- Innovation Point 1 – True All-in-One Architecture: The 07KT97 packs a CPU, 24 DI, 16 DO, 8 AI, 4 AO, two serial ports and a CS31 bus master onto a single board. For small-to-mid sized stations, this means the entire control system can be built with one module—no separate power supply, no separate I/O racks, no backplane headaches.
- Innovation Point 2 – Deterministic CS31 Bus Management: The onboard CS31 interface lets the 07KT97 act as bus master and talk to up to 63 remote I/O stations over a simple two-wire link. This slashes wiring cost in distributed installations while preserving deterministic scan times.
- Innovation Point 3 – Dual Watchdog Survival: A hardware watchdog timer plus software monitoring continuously supervise both the CPU and the user program. If either goes out-of-bound, the 07KT97 resets safely or drops to a defined safe state—exactly what a refinery or power plant demands.
- Innovation Point 4 – Non-Volatile Program Security: With Flash EPROM plus battery-backed RAM and optional SMC memory card, the 07KT97 retains the control program, calibration data and real-time clock settings even through prolonged power loss.
- Innovation Point 5 – IEC 61131-3 Engineering Friendliness: Programming follows international standard languages (Ladder, FBD, Structured Text, etc.) via ABB Control Builder / Procontic tools, so a new engineer can pick up an existing 07KT97 project without vendor lock-in anxiety.
- Innovation Point 6 – Rugged Industrial DNA: Conformal-coated PCBs, galvanically isolated I/O groups, and a –20 °C to +60 °C operating window allow the 07KT97 to survive the dust, vibration and electrical noise of real plant floors.
