Description
ALSTOM ICP232 029.359325
Technical Specifications
- Communication interface: RS232/RS485 dual serial ports
- Communication protocol: MODBUS RTU, proprietary protection device protocol
- Isolation voltage: 2500 VAC between channels and backplane
- Supply voltage: Rack backplane DC24V
- Baud rate: 300 to 19200 bps configurable
- Operating temperature: -25 °C to +70 °C
- Storage temperature: -40 °C to +85 °C
- Relative humidity: 5 % to 95 %, non-condensing
- Protection rating: IP20
- Installation format: Eurocard plug-in card
- Insulation class: Class B
- EMC: IEC 61000-6-2 industrial grade
Functional Features
- Dual serial access via RS232 and RS485
- Protocol conversion mapping field serial data to backplane bus
- 2500 VAC electrical isolation blocking ground loops and common-mode interference
- Independent per-channel LEDs indicating RX/TX communication status
- Fully isolated between backplane and field side
- Baud rate, data bits, parity, stop bits software configurable
- Multi-device polling and transparent data transmission
- Front panel LEDs showing power, run, and fault status
- Hardware watchdog for automatic reset on communication exception
- Wide-temperature industrial design for outdoor substation cabinets
Application Scenarios
- Communication expansion for Alstom protection and measurement devices in substations
- Serial access for power plant electrical monitoring systems
- Communication between Alstom protection relays and background systems
- Signal access for substation RTU telecontrol systems
- Serial gateways for industrial electrical automation
Materials and Construction
- Front panel: Anodized aluminum metal panel
- PCB: FR4 multilayer industrial board with conformal coating
- Communication components: RS232/RS485 isolated transceivers and optocouplers
- Connector: Gold-plated Eurocard backplane connector
- Passive components: TVS surge diodes, metal film resistors, ceramic capacitors
- Terminals: Screw-fastened tin-plated copper terminals
Structural Features
- Eurocard plug-in structure inserted into Alstom device rack backplane
- Front panel integrating LED indicators and communication terminals
- Board partitions between isolated communication, signal conversion, and power areas
- Metal panel shielding design
- Card locking mechanism for vibration resistance
- Physical separation between field side and backplane side
Working Principle Field RS232/RS485 serial signals enter via terminals; isolated transceivers convert differential signals to single-ended logic levels, which are optically isolated and fed to the communication processor. The processor parses field device frames and maps them to backplane registers; the main CPU reads them over the backplane. Commands from the main CPU are packaged into serial frames and transmitted through isolation to field devices. LEDs indicate data transmit/receive status in real time.
Installation Requirements
- Insert the card into the designated rack slot with power off and ESD protection
- Use shielded twisted pair for field signal wires with single-point shield grounding
- Install 120 Ω termination resistor at the end of RS485 bus
- Rack protective grounding
- Cabinet temperature maintained -25 °C to +70 °C
- Configure baud rate and communication parameters after power-up
Precautions
- Do not hot-swap the card while the system is running
- RS485 A/B polarity must not be reversed
- Field serial baud rate must match both ends
- Wear an ESD wrist strap during installation
- Store spares in anti-static, moisture-proof packaging
- For communication faults check termination resistor and wiring
