ABB 07 KR 91 Central Unit with Max. 28 kB User Program

Brief Description

The ABB 07 KR 91 central unit is a versatile automation device designed to function as:

• Bus Master: In the decentralized automation system ABB Procontic CS31.
• Slave (Remote Processor): In the decentralized automation system ABB Procontic CS31.
• Stand-alone Central Unit: For independent operation.

Main Features

Binary Inputs/Outputs

• 20 binary inputs.
• 12 binary relay outputs.

High-Speed Counting

• 1 counting input for frequencies up to 10 kHz.

System Bus Expansion

• 1 CS31 system bus interface for adding up to 31 remote modules.
• Supports 744 binary inputs, 496 binary outputs, 96 analog input channels, and 48 analog output channels.

Serial Interface COM1

• Default as programming interface.
• Configurable as an ASCII interface for peripheral devices (e.g., MMC devices).

Real-Time Clock

• Integrated with a resolution of 1 second.

Diagnostic Functions

• Self-diagnosis of the central unit.
• Diagnosis of the ABB Procontic CS31 system bus and connected modules.

User-Friendly Design

• LEDs display binary input/output signals, operating conditions, and error messages.
• Detachable screw-type terminal blocks for easy installation.
• Detachable front-side plastic sheet for labeling signal names.
• Fastening via screws or DIN rail mounting.

Backup Capabilities (with 07 LE 90 Lithium Battery)

• Stores and backs up the user program in RAM.
• Retains additional RAM data (e.g., flag statuses).
• Maintains time and date (real-time clock).

RUN/STOP Switch

• For starting and stopping program execution.

General Data

Input/Output

• Number of Binary Inputs: 20.
• Number of Binary Relay Outputs: 12.

System Expansion via CS31 System Bus

• Up to 744 binary inputs.
• Up to 496 binary outputs.
• Up to 96 analog input channels.
• Up to 48 analog output channels.
• Maximum of 31 remote modules.

Memory

• Flash EPROM: 32 kB (30 kB for user program).
• RAM: 256 kB (30 kB for user program with online programming).

Processing Speed

• Binary operations: Typical 0.4–0.6 ms/kB program.
• Mixed operations (65% bits, 35% words): Typical 0.7 ms/kB program.

Timer and Counter

• Software Timers: Maximum of 80 active simultaneously, with delays ranging from 5 ms to 24.8 days.
• Up/Down Counter Software Blocks: Unlimited.

Power Supply

• 07 KR 91 R202:
  • Mains Voltage: 115 V AC or 230 V AC.
  • Power Dissipation: Max. 20 W.
• 07 KR 91 R252:
  • Rated Voltage: 24 V DC.
  • Current Consumption: Max. 0.4 A (plus output current through terminal 34).
  • Protection: Reversed terminal connection protection.

Ordering Data

• Central Unit 07 KR 91 R202: Order No. GJR5 2500 00 R202.
• Central Unit 07 KR 91 R252: Order No. GJR5 2500 00 R252.

Scope of Delivery

• Central Unit 07 KR 91 R202 or R252.
• 2 nine-pole terminal blocks.
• 5 five-pole terminal blocks.
• 2 three-pole terminal blocks.
• Safety and mounting instructions.

---

About Us

  Meloauto – Your Trusted Supplier for Original, Brand-New PLC and DCS Parts Meloauto offer a vast selection of products from globally recognized brands, including Allen Bradley, Bently Nevada, Honeywell, ABB, GE Fanuc, Siemens, Invensys Triconex, ICS Triplex, Foxboro, Yokogawa, Schneider, and Hima, among others. With tens of thousands of new parts ready to ship, Meloauto has successfully served customers across over 50 countries worldwide. We focus on supplying discontinued and hard-to-find items, ensuring each product is in brand-new, original condition.

Contact Us

• Phone: +86-15915488782
• Email: uma@meloauto.com
• WhatsApp: +8615915488782
• Business Hours: 24/7 service
• Address: Unit 601, Powerlong International Center, No. 1599 Luling Road, Siming District, Xiamen City, Fujian, China

Let us help you find the automation parts you need with reliable quality and dedicated support!