Description
The ALSPA CEGELEC ALSTOM SCN824C VERSION 8.0B is a high-performance communication and control processor module designed for industrial automation systems, particularly in power generation and substation environments. It provides robust data handling and interfacing capabilities for reliable process control.
Product Parameters
This module features a 32-bit RISC processor running at 50 MHz, with 4 MB RAM, 2 MB Flash memory, and 512 KB EEPROM for program storage. It includes 8 RS-485 serial ports (up to 115 kbps), 16 digital inputs/outputs (24 VDC), 4 analog inputs (±10 V, 12-bit resolution), dual Ethernet 10/100 Mbps ports, and supports Modbus/DNP3 protocols with real-time multitasking OS.

Datasheet Overview
The datasheet specifies operating temperature range of -20°C to +70°C, power consumption of 12 W at 24 VDC (18-36 V input), MTBF >100,000 hours, and compliance with IEC 61131-3 standards. It supports up to 64 I/O modules expansion, hot-swappable design, and diagnostics via front-panel LEDs for status, fault, and link activity.
Country of Origin
Manufactured in France by ALSTOM (formerly Cegelec) for European industrial standards.
Usage Instructions
Secure the module into a compatible ALSPA rack slot, connect power (24 VDC) and communication cables to rear terminals per pinout. Load firmware version 8.0B via Ethernet or serial using ALSTOM configuration software, configure network parameters and I/O mappings, then power cycle to initialize for SCADA integration and process monitoring.
Common Q&A
- Q: Power supply requirements?
A: 24 VDC nominal, tolerant to 18-36 V fluctuations. - Q: Communication protocols?
A: Modbus RTU/TCP, DNP3, with Ethernet redundancy. - Q: Firmware upgrade process?
A: Via serial/Ethernet using dedicated ALSTOM tools.
Similar Models
- SCN804C (base communication variant).
- SCN-B 824D (enhanced I/O version).
- SCN825A (Version 9.x upgrade).
- ALSPA P320 (rack companion).
- Cegelec SCN830 (multi-processor).
