ABB Advant OCS 07 KR 91 Central Processing Unit (CPU)

Product Overview

The ABB 07KR91 (Product ID: GJR5250000R0151) is a high-capacity Central Processing Unit (CPU) built for the Advant OCS / Controller 31 (CS31) platform. Powered by a Motorola 68030 32-bit processor, this unit delivers strong processing power, robust I/O handling, and secure data exchange for demanding industrial automation environments. With built-in diagnostics, modular integration capabilities, and a real-time clock, the 07KR91 optimizes system uptime and operational flexibility.

Key Specifications

• Manufacturer: ABB
• Product ID: GJR5250000R0151
• Product Family: Advant OCS / Controller 31 (CS31)
• Type: Central Processing Unit (Central Unit)
• Processor: Motorola 68030, 32-bit
• Program Memory: ~1 MB
• Data Memory: ~128 kB
• Digital Inputs: 20 channels
• Digital Outputs: 12 channels, relay type
• I/O Capacity: Supports up to ~256 I/O points
• Counting Input: Handles frequencies up to 10 kHz
• Real-Time Clock: Built-in RTC
• Communication Ports: Ethernet, RS-232C, CS31 system bus
• Power Supply: 24 V DC
• Operating Temperature: 0°C to +55°C
• Dimensions: 40 × 137 × 22.5 mm
• Weight: 0.6 kg
• Mounting: DIN rail or screw mount

Features & Benefits

• Powerful 32-Bit Processing: The Motorola 68030 processor delivers fast execution of complex control algorithms and large application programs.
• Integrated Ethernet: Built-in Ethernet port enables direct connection to plant networks, SCADA systems, and remote diagnostics — no additional communication module required.
• High-Speed Counter: Dedicated counting input supports frequencies up to 10 kHz for precise motion and event counting applications.
• Real-Time Clock: On-board RTC enables time-stamped event logging, scheduled operations, and shift-based production tracking.
• Comprehensive I/O: 20 DI and 12 relay DO provide substantial built-in I/O capacity for medium-scale machines and processes.
• CS31 Bus Integration: Native support for ABB's CS31 decentralized bus allows expansion to hundreds of additional I/O points.

Typical Applications

• Machine control with Ethernet connectivity requirements
• Packaging and labeling systems with high-speed counting
• Process skids and OEM equipment
• Building automation with network integration
• Remote monitoring and telemetry systems

Installation Guide

1. Mounting: Install on a 35 mm DIN rail or secure with screws. The compact form factor (40 mm width) saves valuable cabinet space.
2. Power Supply: Connect 24 V DC to the power terminals. Verify polarity and ensure supply stability.
3. Ethernet Configuration: Connect the Ethernet port to your plant network. Configure IP address, subnet mask, and gateway via the programming software or built-in configuration interface.
4. I/O Wiring: Connect field devices to the 20 DI and 12 relay DO terminals. Relay outputs support both AC and DC loads.
5. CS31 Bus Expansion: If additional I/O is needed, connect CS31 bus cables to remote I/O modules and set their addresses.
6. Programming: Use ABB's programming tools via RS-232C or Ethernet to download and debug the application.
7. Counter Setup: Configure the high-speed counter input parameters (counting mode, preset values, interrupt triggers) in the application program.

FAQ

Q: Does the 07KR91 have built-in analog I/O?
A: No, the 07KR91 provides digital I/O only (20 DI / 12 DO). For analog signals, add 07AC91 or 07AI91 expansion modules via CS31 bus.

Q: What Ethernet protocols are supported?
A: The 07KR91 supports standard TCP/IP for programming and data exchange. Specific protocol support (MODBUS TCP, etc.) depends on firmware version — consult the datasheet for your specific revision.

Q: Can I use the 07KR91 as a CS31 slave?
A: The 07KR91 is primarily designed as a bus master or standalone unit. For slave operation, other AC31 basic units may be more appropriate.

Q: What is the relay output rating?
A: Relay outputs typically support 2 A at 250 V AC or 2 A at 24 V DC. Verify exact ratings in the official datasheet for your variant.

Selection Tips

• Choose 07KR91 when you need built-in Ethernet and high-speed counting in a compact form factor.
• For larger memory and built-in analog I/O, upgrade to the 07KT97.
• For PROFIBUS-DP or ARCNET connectivity, consider adding 07KP93 or selecting a different basic unit variant.
• Verify firmware version compatibility with your programming software before installation.
• When replacing a unit, record the IP address and network configuration to minimize commissioning time.