S908-120 Schneider Electric - Schneider Electric S908-120 Modicon Remote I/O Processor. The Schneider Electric S908-120 (AS-S908-120) is a remote I/O processor module designed for Modicon 984 series programmable logic controllers. It provides high-speed serial communication between the central CPU and remote I/O drops via coaxial cable, supporting dual-cable configurations for redundant communication paths. The module manages polling sequences and data integrity across the S908 remote I/O network, enabling up to 31 remote drops with 800-Series I/O modules. It features robust error-checking protocols and transformer-coupled isolation for reliable operation in noisy industrial environments.
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Brand: Schneider Electric
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Category: Programmable Logic Controllers > Communication Modules
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Product Type: Remote I/O Processor Module
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Series: Modicon 984
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Communication Protocol: S908 Remote I/O Network
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Cable Configuration: Dual cable (redundant)
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Max Remote Drops: 31
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I/O Per Drop: 512 bits in / 512 bits out
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Compatible PLCs: Modicon 984, Quantum
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I/O Modules: 800-Series
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Connection: Coaxial cable
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Power Supply: 24V DC
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Operating Temperature: 0 to 60 degrees C
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Mounting: Rack mounted
Used in distributed control systems for process control, manufacturing automation, energy management, and building automation where remote I/O devices need to communicate with a central PLC over long distances.