07MK92 | ABB Advant OCS 07 MK 92 Serial Communication Processor

Product Overview

The ABB 07MK92 (Product ID: GJR5253100R0276) is a freely programmable communication processor for the Advant Controller 31 (AC31) system. Unlike fixed-protocol modules, the 07MK92 features a programmable processor that allows users to implement custom serial communication protocols tailored to specific devices or legacy systems. With 2 serial interfaces (RS-232 / RS-485 configurable), this module is the ultimate solution for integrating non-standard or proprietary serial devices into the AC31 ecosystem.

Key Specifications

• Manufacturer: ABB
• Product ID: GJR5253100R0276
• Product Family: Advant Controller 31 (AC31)
• Type: Freely Programmable Communication Processor
• Serial Interfaces: 2 ports (RS-232 or RS-485, configurable)
• Interface Standards: EIA RS-232C / EIA RS-485
• Processor: Programmable microprocessor (custom protocol implementation)
• Memory: Program and data memory for protocol handling
• Power Supply: 24 V DC (via AC31 basic unit)
• Operating Temperature: 0°C to +55°C
• Storage Temperature: -25°C to +75°C
• Dimensions: Standard AC31 communication module form factor
• Weight: ~0.4 – 0.6 kg
• Mounting: DIN rail EN 50022-35 or screw mounting
• Protection Rating: IP20

Features & Benefits

• Custom Protocol Support: Program the 07MK92 to communicate with virtually any serial device using proprietary or non-standard protocols — no protocol converter needed.
• Dual Serial Ports: Two independent serial interfaces allow simultaneous communication with two different devices or networks.
• RS-232 / RS-485 Flexibility: Each port can be configured for point-to-point (RS-232) or multi-drop (RS-485) communication, adapting to any wiring topology.
• Seamless AC31 Integration: Data exchanged via the 07MK92 is mapped directly into the AC31 basic unit's memory, accessible like any other I/O or variable.
• Legacy System Bridge: Ideal for connecting older equipment, barcode scanners, weigh scales, or specialized instruments that lack modern communication interfaces.
• Industrial Reliability: Electrical isolation and robust construction ensure reliable operation in harsh industrial environments.

Typical Applications

• Integration of proprietary serial devices (weigh scales, barcode readers, RFID systems)
• Legacy equipment modernization without replacing existing controllers
• Custom protocol bridges between AC31 and third-party PLCs
• Multi-vendor automation network gateways
• Specialized instrumentation data acquisition

Installation Guide

1. Mounting: Install the 07MK92 adjacent to the AC31 basic unit on a 35 mm DIN rail. The module connects to the basic unit via the networking interface (ribbon cable).
2. Power Supply: The module receives 24 V DC power from the AC31 basic unit. Loop the supply from the basic unit to the 07MK92 power terminals.
3. Serial Interface Configuration: Configure each port for RS-232 or RS-485 mode using internal jumpers or software settings. RS-485 networks require 120 Ω termination resistors at both ends.
4. Device Connection: Connect the serial device(s) to COM1 and/or COM2. Use shielded cables for RS-485. Maximum cable length depends on baud rate (up to 1200 m at lower baud rates).
5. Protocol Programming: Use ABB's programming tools to develop the custom protocol handler. The 07MK92 processor runs independently, exchanging data with the AC31 basic unit via memory-mapped variables.
6. Data Mapping: Define the memory addresses in the AC31 basic unit where received data will be stored and where transmit data will be sourced.
7. Testing: Verify communication using the device's native diagnostic tools and the AC31 programming software's online monitoring functions.

FAQ

Q: What is the difference between 07MK92 and 07KP93?
A: The 07KP93 is a fixed-protocol MODBUS RTU communication processor. The 07MK92 is freely programmable — you write custom protocol handlers for non-MODBUS devices. Choose 07KP93 for MODBUS; choose 07MK92 for proprietary or custom protocols.

Q: What programming language is used for the 07MK92?
A: The 07MK92 is programmed using ABB's specialized communication processor tools, typically involving low-level protocol definition and data mapping. Consult ABB documentation for the specific development environment.

Q: Can the 07MK92 handle high-speed serial communication?
A: The module supports standard industrial baud rates. Maximum baud rate depends on the processor load and protocol complexity. Typical applications use 9600 to 115200 bps.

Q: Is the 07MK92 still available?
A: The 07MK92 is a mature product. Availability depends on ABB's production status and authorized distributor stock. For new projects requiring custom serial protocols, consider evaluating ABB's AC500 communication modules as a modern alternative.

Selection Tips

• Choose 07MK92 only when your application requires a custom or proprietary serial protocol that cannot be handled by standard modules.
• For MODBUS RTU, use 07KP93 — it is simpler to configure and more cost-effective.
• For Ethernet-based protocols (MODBUS TCP, PROFINET, EtherNet/IP), consider upgrading to ABB's AC500 or AC800M platforms.
• When programming custom protocols, thoroughly document the data mapping and protocol timing to simplify future maintenance.
• Ensure the serial device supports electrical isolation or add external isolators to protect against ground loops.
• When replacing a failed 07MK92, preserve the protocol program and configuration data — these are not automatically recoverable from the AC31 basic unit.