{"product_id":"schneider-modicon-s908-ass908022-remote-i-o-modules","title":"Schneider Electric ASS908022 Modicon S908 Remote I\/O Processor Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Schneider Electric ASS908022 is a dedicated S908 remote I\/O processor module designed for high-availability communication within Modicon 984 and Quantum PLC architectures. This module serves as a critical interface for managing deterministic data routing across distributed remote I\/O networks. It is engineered for demanding industrial environments, including power generation, petrochemical processing, and heavy industrial automation, where reliable communication and low-latency signal transmission are essential for process stability.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSupports deterministic token-passing protocol for consistent network timing.\u003c\/li\u003e\n\u003cli\u003eDual-channel architecture (Channel A and Channel B) enables seamless redundant physical bus operation.\u003c\/li\u003e\n\u003cli\u003eAutomatic switchover capability detects line attenuation or physical breaks within a single scan cycle.\u003c\/li\u003e\n\u003cli\u003eIntegrated galvanic isolation protects backplane logic from electromagnetic interference and electrical surges.\u003c\/li\u003e\n\u003cli\u003eDirectly maps remote drop I\/O registers into the controller memory map for streamlined data access.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is typically deployed in large-scale distributed control systems that utilize S908 coaxial communication backbones. It is ideal for applications requiring long-distance I\/O connectivity, redundant communication paths to prevent downtime, and integration with legacy Modicon 984 or Quantum controller platforms.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eASS908022 (S908 022)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSchneider Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Interface\u003c\/td\u003e\n\u003ctd\u003eDual BNC connectors (Channel A\/B)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Medium\u003c\/td\u003e\n\u003ctd\u003e75 Ohm RG-6 or RG-11 coaxial cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Rate\u003c\/td\u003e\n\u003ctd\u003e1.544 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Drop Capacity\u003c\/td\u003e\n\u003ctd\u003e32 remote I\/O stations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Distance\u003c\/td\u003e\n\u003ctd\u003e4500 m (with repeaters) \/ 1500 m (point-to-point)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirements\u003c\/td\u003e\n\u003ctd\u003e850 mA at 5 VDC (from backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the PLC chassis power is disconnected before inserting or removing the module to prevent damage to the backplane pins.\u003c\/li\u003e\n\u003cli\u003eSeat the module firmly into the designated slot and secure it using the integrated locking mechanisms.\u003c\/li\u003e\n\u003cli\u003eUse high-quality 75 Ohm coaxial cable (RG-6 or RG-11) for network runs; ensure proper termination at all drop points to prevent signal reflection.\u003c\/li\u003e\n\u003cli\u003eMaintain separation between communication cabling and high-voltage power lines to minimize EMI.\u003c\/li\u003e\n\u003cli\u003eVerify that the dual-channel BNC connections are secure and that the cable shielding is properly grounded at the network source.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs this module compatible with Quantum series PLC backplanes?\u003c\/strong\u003e Yes, the ASS908022 is designed for compatibility with Modicon 984 and Quantum backplane structures.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if one of the coaxial cables fails?\u003c\/strong\u003e The module features redundant bus architecture and will perform an automatic switchover to the secondary channel within a single network scan cycle if a fault is detected on the primary path.\u003c\/p\u003e","brand":"Schneider","offers":[{"title":"Default Title","offer_id":44019638009946,"sku":"ASS908022","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/wm_1_38705a9a-fad8-499a-92fa-c7c4565c40e5.jpg?v=1788663087","url":"https:\/\/www.spareoil.com\/products\/schneider-modicon-s908-ass908022-remote-i-o-modules","provider":"SpareOil Automation","version":"1.0","type":"link"}