ABB 07 KT 97 Central Unit Basic Unit for Industrial Automation

What Is the ABB 07 KT 97 Central Unit Basic Unit?

When your control system demands reliable and flexible I/O handling, the ABB 07 KT 97 Central Unit Basic Unit delivers. This compact controller integrates 24 digital inputs, 16 digital transistor outputs, and 8 configurable digital inputs/outputs. It also includes 8 analog inputs and 4 analog outputs, making it a versatile core for automation tasks. With integrated Flash EPROM memory of 512 kB (480 kB program + configuration data) and RAM of 2 MB (480 kB program with on-line programming + 256 kB variables), the 07 KT 97 handles complex logic efficiently. Its processing time is typically 0.3 ms per kB program (65% bits, 35% words), ensuring fast execution.

Technical Specifications Breakdown

The 07 KT 97 operates on a rated supply voltage of 24 V DC with a maximum current consumption of 0.35 A. It includes protection against reversed polarity. The digital inputs are grouped into 3 groups of 8 channels each, with signal coupling via optocoupler. Input signal voltage for Signal 0 is -30 V to +5 V, and for Signal 1 is +13 V to +30 V. Input current per channel at +24 V is typically 7.0 mA. The 16 digital transistor outputs are divided into 2 groups of 8 channels, each with a rated output current of 500 mA at 24 V (maximum 625 mA at 24 V + 25%). The outputs are short-circuit proof and overload proof, with protection against reversed polarity. The 8 analog inputs support configurations like 0...10 V, 0...5 V, ±10 V, ±5 V, 0...20 mA, 4...20 mA, and Pt100 (-50...+400°C and -50...+70°C). Input impedance for voltage input is >100 kΩ, and for current input is ca. 330 Ω.

Industry Applications

The ABB 07 KT 97 excels in manufacturing lines requiring precise I/O control. For example, in a packaging machine, its 24 digital inputs can monitor sensor statuses, while 16 digital outputs actuate pneumatic valves. The 8 analog inputs read temperature from Pt100 sensors, and 4 analog outputs regulate speed drives. Its high-speed hardware counter, with a counting frequency up to 50 kHz, suits applications like conveyor belt speed monitoring. The integrated real-time clock with 1-second resolution supports time-stamped data logging for quality control.

Installation & Setup Guidance

Mount the 07 KT 97 on a DIN rail or directly using screw terminals. Use removable screw-type terminal blocks for wiring. For the CS31 system bus, use a maximum wire size of 1 x 2.5 mm² or 2 x 1.5 mm². For all other terminals, use max. 1 x 1.5 mm². Ensure the rated supply voltage of 24 V DC is stable and within limits. The lithium battery module 07 LE 90 backs up RAM contents with a typical lifetime of 5 years at 25°C. For programming, use the 907AC1131 system. The unit supports cyclic and time-controlled multitasking with up to 20 tasks.

Compatibility & Integration

The 07 KT 97 integrates via the CS31 system bus, allowing I/O expansion with up to 992 digital inputs, 992 digital outputs, 224 analog input channels, and 224 analog output channels using up to 31 remote modules. It includes 2 serial interfaces for programming or connection to man-machine communication, and 1 parallel interface for a communication processor to network with other bus systems. Protocols such as Profibus DP, ARCNET, and MODBUS are supported. The unit also features a Smart Media Card (Flash) slot for data storage and program reloading.

Maintenance & Reliability

Routine inspection of the lithium battery every few years ensures data retention. The unit provides 60 LEDs for operating status and error indication, simplifying diagnostics. The digital outputs include internal varistor demagnetization for inductive loads, extending relay life. With protection against reversed polarity and short-circuit proof outputs, the 07 KT 97 minimizes downtime. For safety-rated equipment, always follow the manufacturer's safety manual for periodic testing.

Selection Guide & Purchasing Advice

Before ordering, verify your system's voltage requirements (24 V DC) and I/O count. The 07 KT 97 suits applications needing up to 24 digital inputs, 16 digital outputs, and 8 analog inputs. For expanded I/O, plan for CS31 bus modules. BluePLC Industrial offers genuine ABB 07 KT 97 units with reliable support. Contact them to confirm current lifecycle status and availability.