Product Introduction

Model Explanation

• 07: Denotes ABB AC31/Procontic 90 series platform

• KA: Stands for Communication Adapter (serial interface function)

• 9: Indicates hardware revision and functional version

• Alternative Part Number: Often cross-referenced with GJR5251000R0303 (standard 07KP90 part number)

Technical Parameters

• Power Supply: 24 VDC ±10%, typical 400 mA

• Power Consumption: ≤10 W

• Communication Standard: RS‑485 (RCOM protocol)

• Isolation: 500 VAC between communication and backplane

• Operating Temperature: -20 °C to +60 °C

• Storage Temperature: -25 °C to +70 °C

• Protection Class: IP20 (for rack mounting)

• Dimensions (W×H×D): 51 × 254 × 152 mm

• Weight: Approximately 0.4 kg

• Certifications: CE, UL, RoHS compliant

Interface and Communication Configuration

• Physical Interfaces: Two DB9 connectors (RCOM1, RCOM2) for RS‑485 communication

• Protocol: RCOM (ABB proprietary serial protocol), supporting master/slave operation

• Network Capacity: Supports up to 32 slave devices in a single network

• Termination: Built‑in termination resistor switch for bus matching

• Signals: 24 VDC power terminals, RUN/COMM/ERR LED indicators

• Wiring: Shielded twisted pair cable recommended for RS‑485 bus connections

Core Functions

1. RCOM Master/Slave Communication: Enables data exchange between AC31 PLCs, Procontic T200 systems, and MasterPiece 200 controllers.

2. Distributed I/O Networking: Connects remote I/O modules and field devices to the main AC31 control system.

3. Protocol Conversion: Bridges legacy ABB systems with modern automation architectures for seamless data integration.

4. High Noise Immunity: Designed for industrial EMI environments with electrical isolation and surge protection.

5. System Expansion: Extends the communication capability of AC31 CPU units without additional hardware.

Application Scenarios

• AC31 System Expansion: Adding serial communication ports to AC31 PLCs for connecting third‑party devices.

• Production Line Networking: Interconnecting Procontic T200 and AC31 controllers in manufacturing lines.

• Legacy System Upgrade: Facilitating migration from MasterPiece 200 to AC500 systems while maintaining old communication links.

• Distributed Control Systems: Deploying in process automation for monitoring and controlling field sensors and actuators.

• Industrial Data Acquisition: Collecting data from remote I/O stations and transmitting to the central AC31 controller.

Usage and Maintenance Instructions

• Installation: Mount on a 35 mm DIN rail or insert into an AC31 standard rack slot; ensure proper grounding.

• Wiring: Use shielded twisted pair cables for RCOM communication; separate from high‑power cables to avoid interference.

• Configuration: Set master/slave mode and node address via DIP switches or programming software; enable termination resistors at bus ends.

• LED Indicator Check: RUN (green) for normal operation, COMM (yellow) for data transmission, ERR (red) for faults.

• Maintenance: Inspect terminals annually for tightness; check cable integrity and shielding; keep the module free from dust and moisture.

• Troubleshooting: Verify power supply and wiring; check network termination; reconfigure communication parameters if errors occur.