Schneider AEG AS-S908-120 Bus Control Module

Schneider AEG AS-S908-120 is a modular control unit launched by Schneider Electric, belonging to its AEG (Advanced Electronic Group) product series.

Schneider AEG AS-S908-120

1. Overview

Schneider AEG AS-S908-120 is a modular control unit launched by Schneider Electric, belonging to its AEG (Advanced Electronic Group) product series. Positioned as a small-to-medium-sized fieldbus/PLC control module, it enables I/O acquisition, logic operation and communication functions in automated systems.

2. Key Specifications

Specifications	Details
Model	AS-S908-120
Dimension	1U (approx. 44 mm in height)
Power Supply	24 V DC (external power module required)
I/O	8 digital inputs, 8 digital outputs (analog I/O expansion optional)
Communication Interfaces	2-channel RS-485 (supporting Modbus RTU/ASCII) 1-channel Ethernet (optional)
Operating Temperature	-10 °C to +55 °C
Protection Grade	IP20 (for indoor cabinet installation)
Certifications	CE, UL, CSA and other international safety certifications

3. Product Features

Modular combination: Freely assemble with same-series CPUs, communication modules and expansion modules to meet control requirements of different scales.
Plug-and-play: Adopts standard slots for quick on-site assembly, maintenance and replacement.
High reliability: Industrial-grade components ensure excellent anti-interference and anti-vibration performance, suitable for harsh working environments.
Flexible programming: Compatible with Schneider EcoStruxure control software, supporting multiple programming languages such as ladder diagram and structured text.
Diagnostic function: Built-in self-test function and fault indicator lights for quick on-site troubleshooting.

4. Structure & Components

Main board: Equipped with 32-bit MCU core processor and Flash + RAM storage.
Digital I/O expansion board: Provides 8-channel DI / 8-channel DO with optocoupler isolation.
Communication board: Integrated with RS-485 transceiver and optional Ethernet PHY.
Power interface: 24 V DC input terminal, used with external power modules.
Cabinet mounting slot: 19-inch rack slot compliant with IEC 60297 standard.

5. Typical Application Fields

Building automation: Centralized control of air conditioning, lighting and security systems.
Distribution automation: Monitoring and protection of distribution cabinets and substations.
Industrial processes: Logic control of packaging, conveying and assembly lines.
Energy management: Monitoring and dispatching of photovoltaic inverters and energy storage systems.

6. Installation & Maintenance Notes

Installation

Insert the module into the corresponding slot of a standard 19-inch cabinet and fix it with screws; ensure correct connection of power and communication cables.

Wiring

Use shielded cables for digital I/O, and twisted-pair cables with terminal resistors for RS-485.

Commissioning

Realize online monitoring, parameter configuration and program download via Schneider EcoStruxure software.

Maintenance

The module is equipped with fault indicator lights. In case of abnormality, first check the power supply, communication and I/O terminals; the module can be hot-swapped for replacement when necessary without shutting down the system.

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Main brand

ABB Allen-Bradley Alstom Bently Emerson Foxboro

GE MOOG Schneider Woodward HIMA Honeywel Triconex & more

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Company Introduction

Our company is a professional high-tech enterprise with years of experience in the sales of spare parts for large-scale imported systems (Distributed Control Systems, Programmable Logic Controllers, Redundant Fault-Tolerant Control Systems, Robot Systems). We mainly engage in the sales of spare parts and system integration for imported automation systems of well-known brands such as ABB, Foxboro, Triconex, Bently Nevada, Ovation, Motorola, Xycom, A-B, Schneider, GE Fanuc, Yaskawa, Woodward, etc.

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