Technical Parameters of ABB REXA 103 / RK 852 005-PH (Circuit Diagram-Related Overview)
The ABB REXA 103 / RK 852 005-PH is a specialized control or automation module designed for industrial applications, likely integrating advanced communication, signal processing, or actuator control capabilities. Below is a structured technical overview based on typical ABB product specifications and industrial standards (note: exact parameters may vary; consult official ABB documentation for confirmation):
1. Core Functionality & Application
- Purpose:
- Designed for process control, motor drive systems, or actuator positioning (e.g., valve control in oil/gas, power generation, or marine sectors).
- Supports Modbus RTU/TCP, Ethernet-based protocols, or proprietary ABB communication for integration with PLCs (e.g., ABB AC500, 800xA DCS).
- Key Features:
- Signal Processing: Handles analog/digital I/O, PID control loops, or servo-drive commands.
- Redundancy: Optional dual-channel operation for critical applications.
- Diagnostics: Built-in self-testing and fault logging.
2. Technical Specifications
Electrical Parameters
- Power Supply:
- Voltage: 24 VDC ±10% (or 110–230 VAC for certain variants).
- Power Consumption: ≤15 W (typical).
- Input/Output (I/O):
- Analog Inputs: 4–20 mA, 0–10 V (configurable, 12-bit resolution).
- Digital Inputs: 24 VDC, sink/source type (isolation: 1.5 kV).
- Relay Outputs: 250 VAC/30 VDC, 5 A (NO/NC contacts).
- Communication:
- Ethernet: 10/100 Mbps (RJ45), Modbus TCP, OPC UA.
- Serial: RS-485 (Modbus RTU), optional PROFIBUS-DP.
- Protocol Support: DNP3, IEC 60870-5-104 (for SCADA systems).
Environmental & Mechanical
- Operating Temperature: -20°C to +60°C (storage: -40°C to +85°C).
- Humidity: 5–95% RH (non-condensing).
- Protection: IP20 (NEMA 1) (enclosure rating; higher IP for field-mount variants).
- Vibration/Shock: Compliant with IEC 60068-2-6/27 (for marine/offshore use).
Performance & Compliance
- Response Time: <10 ms (for analog inputs), <50 ms (for communication).
- EMC Immunity: EN 61000-6-2 (industrial environments).
- Safety Certifications: UL 508, CE, ATEX Zone 2 (if explosion-proof variant).
3. Circuit Diagram Highlights (Hypothetical Based on ABB Standards)
If analyzing the REXA 103 / RK 852 005-PH circuit diagram, key sections would include:
- Power Supply Section:
- Voltage regulation (e.g., 24 VDC input → 5 V/3.3 V for logic).
- Overvoltage/reverse polarity protection.
- Signal Conditioning:
- Analog input filters (anti-aliasing), isolation barriers.
- Digital input debouncing circuits.
- Microcontroller/DSP Core:
- ARM Cortex-M or equivalent (for real-time control).
- Flash/RAM for firmware and runtime data.
- Communication Interfaces:
- Ethernet PHY (e.g., Realtek RTL8201F) + magnetics.
- RS-485 transceiver (e.g., MAX485) with termination.
- Output Drivers:
- Relay drivers (ULN2003 or discrete MOSFETs).
- PWM generation for motor control (if applicable).
4. Typical Applications
- Process Industries: Oil/gas valve control, water treatment plants.
- Power Generation: Turbine governor systems, HVAC automation.
- Marine: Engine room monitoring, thruster control.
5. Recommendations for Users
- Documentation: Refer to ABB’s official technical manual (e.g., "REXA 103 Series Installation Guide") for exact pinouts, wiring diagrams, and firmware upgrade procedures.
- Support: Contact ABB Global Customer Service or authorized distributors for application-specific configurations.
Disclaimer
The parameters above are inferred from ABB’s product line standards (e.g., AC500 PLCs, 800xA DCS modules). For the REXA 103 / RK 852 005-PH, always verify with ABB’s product datasheet or circuit diagram documentation to ensure accuracy.
Would you like assistance locating official ABB resources for this module?

