Technical Overview
The Schneider ASS908120 functions as a dedicated remote I/O processor for the Modicon M340 automation platform. This module manages distributed I/O networks through its Fipway communication interface, enabling seamless data exchange with field devices. Its robust design facilitates rapid scanning, with a typical cycle time of 1 ms for 8 remote stations. Furthermore, the ASS908120 supports up to 64 I/O modules across its network, making it ideal for geographically dispersed automation systems.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Type | Remote I/O Processor Module |
| Communication Protocol | Fipway (Factory Instrumentation Protocol) |
| Communication Speed | 1 Mbps / 2.5 Mbps (switchable) |
| Number of Remote Stations | Up to 8 (with repeater) |
| Maximum Cable Length | 2.5 km (optical fiber) / 200 m (copper) |
| I/O Modules Supported | Up to 64 per network |
| Scan Cycle Time | 1 ms (typical for 8 stations) |
| Memory | 128 KB RAM / 512 KB Flash |
| Power Supply | 24 VDC |
| Current Draw | 160 mA |
| Diagnostic LEDs | RUN, ERR, COM, ACTIVE |
| Dimensions (H x W x D) | 100 x 110 x 52 mm |
| Weight | 0.18 kg |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -25°C to 70°C |
| Protection Class | IP20 |
Communication and Network Architecture
The Schneider ASS908120 operates as a master device on the Fipway bus, polling remote I/O drops to collect input data and distribute output commands. Its switchable communication speed of 1 or 2.5 Mbps provides flexibility when integrating mixed networks. The module supports both copper and optical fiber cabling, allowing installation distances up to 2.5 kilometers between remote stations.
Diagnostics and Maintenance
This processor module integrates diagnostic LEDs for RUN, ERR, COM, and ACTIVE status, enabling quick troubleshooting during commissioning. These indicators allow technicians to assess network health and identify faulty stations without external tools. Moreover, its compact dimensions and lightweight construction simplify installation in crowded control cabinets.
Integration with Modicon M340
The ASS908120 connects directly to the Modicon M340 backplane, requiring no additional adapters or interface modules. It coordinates with the main CPU through the internal bus, offloading I/O scanning duties to improve overall system performance. Consequently, this module enhances distributed control architectures where sensors and actuators span large factory floors or multiple buildings.
Details
| Weight | 0.18 kg |
|---|---|
| Dimensions | 100 × 110 × 52 mm |
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