Name: ABB 07KT97 Advant OCS Central Unit with 480 KB Program Memory - MASSIVE
SKU: ABB 07KT97

ABB 07KT97 Advant OCS Central Unit with 480 KB Program Memory

Brand ABB

Model ABB 07KT97

The ABB 07KT97 is a high-integration basic unit that functions as the central processing unit for ABB Advant Controller 31 systems. It can operate as a standalone controller, a CS31 bus master, or a remote slave processor, giving engineers a flexible platform for machine control and distributed automation. Rather than relying on numerous expansion cards for basic signal handling, the ABB 07KT97 integrates 24 digital inputs, 16 transistor outputs, eight configurable digital I/O channels, eight analog inputs, four analog outputs, and two high-speed counters in a single module.

Processing resources include 480 KB of user program memory and 256 KB of user data memory implemented in Flash EPROM, along with an integrated real-time clock and SmartMedia Card support. The ABB 07KT97 executes programs created with 907 AC 1131 and provides deterministic performance, with a typical processing time of 0.3 ms per kilobyte of mixed bit and word logic. Onboard communication includes the CS31 system bus, two serial interfaces, and a parallel interface for communication processors, enabling direct connection to programming devices, operator panels, and remote I/O stations.

Different order suffixes determine the available network interfaces, so the physical CPU must be matched to the existing station configuration. Variants include basic units without a network coupler, as well as versions with ARCNET, PROFIBUS-DP, CANopen, or Ethernet. Because the ABB 07KT97 is now classified as obsolete, replacements require careful verification of the order number, firmware, SmartMedia Card contents, and connected communication hardware.

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Description

Technical Specifications

Parameter	Value
Product Model	ABB 07KT97
Product Family	Advant Controller 31 basic unit
Device Type	Central processing unit
User Program Memory	480 KB Flash EPROM
User Data Memory	256 KB Flash EPROM
Digital Inputs	24 channels in three isolated groups of eight
Digital Outputs	16 transistor outputs in two isolated groups of eight
Configurable Digital I/O	8 electrically isolated channels
Analog Inputs	8 configurable channels
Analog Outputs	4 configurable channels
High-Speed Counters	2 channels, up to 50 kHz
System Bus	CS31 for remote I/O and distributed stations
Serial Interfaces	COM1 and COM2 for programming and Modbus
Real-Time Clock	Integrated, backed by 07 LE 90 lithium battery
Memory Extension	SmartMedia Card 07 MC 90
Supply Voltage	24 V DC
Programming Software	907 AC 1131
Mounting	35 mm DIN rail or screw mounting
Operating Temperature	0 °C to +55 °C

Main Features and Advantages

Integrated control and I/O: The ABB 07KT97 reduces cabinet complexity by combining the processor with local analog and digital I/O. Small and medium applications can run without extensive module racks, while larger systems can retain the same CPU and expand through CS31 remote I/O.

Flexible analog signal handling: Eight analog inputs can be individually configured for voltage, current, Pt100, or differential measurements, and can also serve as digital inputs. Four analog outputs support voltage and current ranges, allowing the same controller to handle temperature, pressure, flow, level, and actuator control.

Deterministic processing: The CPU is designed for predictable program execution, with status and error LEDs that simplify startup and fault diagnosis. The integrated high-speed counter responds independently of normal program execution, making the ABB 07KT97 suitable for pulse counting, incremental encoder evaluation, and fast event capture.

Scalable distributed architecture: CS31 allows the basic unit to communicate with remote I/O modules and other AC31 devices. The controller can therefore scale from a compact standalone station to a distributed control system without changing the core processor platform.

Configurable network connectivity: Hardware variants support ARCNET, PROFIBUS-DP, CANopen, and Ethernet. This allows the ABB 07KT97 to integrate with legacy Advant networks or later control and SCADA systems, although the exact interfaces depend on the order suffix.

Program and data protection: User programs reside in nonvolatile Flash EPROM, while the SmartMedia Card provides additional storage for programs, user data, and firmware. The battery preserves the real-time clock and volatile data, but the battery should be replaced proactively during planned maintenance.

Application Field

The ABB 07KT97 is used where an existing Advant Controller 31 system must be maintained, repaired, or replicated. It supports continuous-process control, machine automation, and distributed I/O architectures that were originally engineered around AC31 hardware and 907 AC 1131 programs.

Typical applications include pump and valve sequencing, motor control, temperature regulation, pressure and flow control, dosing systems, conveyor coordination, and packaging-machine logic. The onboard analog channels make it suitable for closed-loop control, while the CS31 bus allows remote I/O to be concentrated near field devices and brought back to a central controller.

The controller is also relevant to power-generation balance-of-plant systems, water and wastewater treatment, building and HVAC controls, and industrial machines where the original control philosophy must be preserved. Because the ABB 07KT97 is obsolete, it is especially valuable for like-for-like spare replacement, emergency repairs, and phased modernization projects that cannot justify rewriting the control application.

Successful deployment depends on matching the replacement variant to the original network interfaces and communication parameters. Programs, SmartMedia Cards, and station addresses must be preserved or properly migrated, and the replacement should be verified against ABB system documentation before returning the plant to automatic operation.