Overview
The 560CMR02 Communication Unit (CMU) is the central processing and communication backbone of the high-performance RTU560 remote terminal unit portfolio, engineered by Hitachi Energy (formerly Hitachi ABB Power Grids) for complex substation automation and grid SCADA systems.
Occupying two slots in the RTU560 rack chassis, this industrial-grade master module serves as the Serial Peripheral Bus (SPB) master, orchestrating all rack-mounted I/O modules. It executes real-time process data acquisition, remote command issuance, multi-layer cross-network communication, plant-wide time synchronization, and embedded web-based local HMI access.
Two hardware variants are available to meet differentiated grid cybersecurity compliance requirements:
560CMR02 R0001 (Order Code: 1KGT036300R0001)
Standard baseline cybersecurity functions, ideal for conventional distribution substations and legacy grid retrofit projects.
560CMR02 R0002 (Order Code: 1KGT036300R0002)
Embedded dedicated security chip delivering advanced encryption, access control and threat prevention, meeting strict modern power grid cybersecurity standards for key transmission substations and renewable energy central control stations.
All technical specifications, mechanical designs, and electromagnetic performance fully comply with the official 2020 datasheet issued by Hitachi Energy Germany AG, Mannheim.
Core Hardware Architecture
Main Processing & Storage
Central Processor: ARM Cortex-A8 AM3352 running at 800 MHz with a real-time operating system
RAM: 128 MByte
Boot Flash: 8 MByte
Removable Storage: Push-pull SD 2.0 Class 2 slot supporting 4 GByte SD card; all configuration data securely stored in non-volatile flash and retained through power outages
Battery-Buffered Real-Time Clock (RTC)
Base time resolution: 1 second; 1 ms precision after external time synchronization
Battery service life: Over 10 years
Free-running clock drift: ±50 ppm, supporting accurate SOE sequence-of-event logging
Full Interface Portfolio (RJ45 Industrial Connectors)
Six universal serial ports (CP1–CP6)
Software-selectable RS232C / RS485 per channel; baud rate range 200 bit/s to 38.4 kbit/s. CP1 and CP2 can be configured as front-side SPB I/O bus extension ports.
Dual independent 10/100 Base-T Ethernet ports (E1, E2)
Redundant network design for SCADA uplink, local HMI connection, and built-in web server access.
Micro USB 2.0 Device Port
Exclusive service interface for on-site commissioning, firmware upgrade, and equipment diagnostics.
Backplane SPB I/O Bus
Hardwired connection to RTU560 rack backplane for high-speed bidirectional I/O data exchange.
Power Consumption & Status LED Indicators
Power supplied via RTU560 backplane:
Front panel LED status signalling:
RUN (Green): Normal module operation
ERR (Red): Solid = fault state; Blinking = warning state
T/R: Serial port transmit / receive activity
S: Ethernet speed indicator (On = 100 MBit/s, Off = 10 MBit/s)
L: Ethernet link status (On = link established, Blinking = data activity)
Mechanical & Connection Specifications
Chassis Occupation: 2 standard rack slots
Backplane Connector: 48-pin Type F DIN 41612
Operating Environment (per EN 60068 series standards)
Continuous operating temperature: -25 °C to +70 °C
Short-term maximum temperature (up to 96 hours): +85 °C
Minimum startup ambient temperature: -40 °C
Relative humidity: 5 % to 95 %, non-condensing
Key Functional Capabilities
1. Centralized I/O Module Orchestration
As SPB bus master, the 560CMR02 uniformly manages all analog and digital I/O modules within the RTU560 rack. It captures real-time process events from input boards and transmits remote control / regulation commands to output boards with millisecond response latency.
2. Multi-Layer Cross-Device Communication
Upstream connection: Interact with central SCADA dispatch systems and local station HMI via RS232 serial or Ethernet
Downstream connection: Communicate with subordinate RTUs, protection IEDs, multi-function meters, PV inverters, and wind turbine controllers via RS485 serial or Ethernet
Native support for mainstream power industry communication protocols over both serial and Ethernet media
3. Station-Wide Precision Time Synchronization
Generates a unified time reference for the entire RTU560 rack and synchronizes all connected I/O modules. Accepts timing inputs via backplane clock source, serial port, or Ethernet LAN to guarantee consistent event timestamps for post-fault analysis.
4. Embedded Web Server Operation
Integrated web service accessible via dual Ethernet ports. Field technicians view real-time measurements, alarm logs, module health status, and configuration data via standard web browsers, eliminating the need for proprietary software and simplifying on-site commissioning and maintenance.
5. Industry-Grade Electromagnetic Compatibility
Fully compliant with IEC 61000-4 series Class 3 immunity criteria for harsh substation environments:
IEC 61000-4-2 ESD: 8 kV air / 6 kV contact
IEC 61000-4-3 RF radiated field: 10 V/m
IEC 61000-4-4 Fast transients: 4 kV
IEC 61000-4-5 Surge: 2 kV
IEC 61000-4-6 Conducted RF interference: 10 V
IEC 61000-4-18 Damped oscillatory waves: 2.5 / 1 kV
All immunity tests achieve Performance Criterion A (continuous error-free operation during disturbance).
Typical Application Scenarios
High and medium voltage transmission & sub-transmission substation automation
Wind farm, photovoltaic, and energy storage new energy station remote data collection & SCADA uplink
Hydropower plants, water pump stations, and rail transit power supply monitoring systems
Legacy grid RTU renovation and hybrid serial/Ethernet mixed networking gateway
Industrial captive power plants and microgrid local monitoring & dispatch communication
