Product Introduction

Model Explanation

• 07: AC31/Procontic 90 series platform

• KP: Communication Processor (RCOM protocol)

• 90: Hardware version and functional variant

• Ordering Number: GJR5251000R0303 (standard part)

Technical Parameters

• Power Supply: 24 VDC ±10% (19.2–30 VDC)

• Current Consumption: ~105 mA typical

• Communication Protocol: ABB proprietary RCOM (Remote Communication)

• Physical Interface: RS‑485 (2‑wire), isolated

• Network Topology: Multi‑drop, up to 32 slaves per master

• Baud Rate: 300–19200 bps (configurable)

• Isolation: 500 VAC between communication and backplane

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

• Storage Temperature: -40 °C to +75 °C

• Mounting: 35 mm DIN rail or AC31 rack slot

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

• Weight: Approx. 0.4 kg

• Certifications: CE, UL, RoHS compliant

Interface and Communication Configuration

• Connector: Two DB9 ports (RCOM1/RCOM2) for RS‑485

• RCOM Modes: Master (controls network) / Slave (responds to master)

• Termination: Built‑in 120 Ω termination resistor (DIP switch)

• LED Indicators:

  • RUN (green): Power and module OK

  • COMM (yellow): Data activity

  • ERR (red): Fault/communication error

• Wiring: Shielded twisted pair (STP) recommended; separate from high‑power cables

Core Functions

1. RCOM Master/Slave Communication: Links AC31, Procontic T200, and MasterPiece 200 controllers.

2. Distributed I/O Networking: Connects remote RCOM I/O stations to central AC31 CPU.

3. Legacy System Bridge: Enables migration from older ABB systems to modern AC500 while preserving RCOM links.

4. Long‑Distance Communication: Supports leased lines, dedicated cables, and dial‑up modems for wide‑area connectivity.

5. Network Diagnostics: LED status and AC31 system diagnostics for fast fault localization.

Application Scenarios

• AC31 System Expansion: Adding RCOM ports to AC31 PLCs for legacy device connection.

• Factory Floor Integration: Interconnecting Procontic T200 and AC31 controllers in production lines.

• Legacy Upgrade Projects: Migrating MasterPiece 200 systems to AC31/AC500 without replacing field wiring.

• Process Automation: Distributed control in water treatment, power, and chemical plants.

• Remote Monitoring: RCOM over modem links for remote site supervision.

Usage and Maintenance Instructions

• Installation: Mount on 35 mm DIN rail or insert into AC31 rack; ensure proper grounding and ventilation.

• Wiring: Connect 24 VDC; use STP for RS‑485; enable termination only at bus ends.

• Configuration: Set master/slave mode, node address, and baud rate via AC31 programming software.

• Routine Check: Verify LED status quarterly; inspect terminals and shielding annually.

• Troubleshooting: Check power and wiring; confirm termination and address settings; reconfigure if errors persist.