The AS-B814-108 is a digital input module engineered as a key component in Schneider Electric’s Modicon Momentum and Premium automation systems. As part of the company’s extensive I/O portfolio, it integrates into control architectures by serving as the interface between discrete field devices—such as limit switches, pushbuttons, and proximity sensors—and the system’s central processing unit (CPU).
Model AS-B814-108
Brand Schneider Electric
Type Digital Input Module
Number of Channels 16 isolated channels
Input Voltage Range 24V DC (15V to 30V DC)
Input Current 7mA per channel at 24V DC
Response Time <1ms typical
Operating Temperature -25°C to 70°C (-13°F to 158°F)
Mounting DIN rail (35mm)
Dimensions 110mm x 90mm x 62mm (W x H x D)
Weight 0.28 kg (0.62 lbs)
Certifications CE, UL, cUL, ATEX, IECEx
Isolation Galvanic isolation between channels
The AS-B814-108 is a digital input module engineered as a key component in Schneider Electric’s Modicon Momentum and Premium automation systems. As part of the company’s extensive I/O portfolio, it integrates into control architectures by serving as the interface between discrete field devices—such as limit switches, pushbuttons, and proximity sensors—and the system’s central processing unit (CPU).
AS-B814-108
Its core function is to convert physical on/off signals from field devices into digital data that the controller can process to execute logic sequences. For engineers and integrators, theAS-B814-108 delivers exceptional value through its high channel count and flexible voltage compatibility, eliminating the need for multiple specialized modules in mixed-signal environments. Whether deployed in machine-level control or distributed across plant floors, this module integrates seamlessly with existing infrastructure, reducing complexity and lowering installation costs.
AS-B814-108
Main features and advantages:
The AS-B814-108 distinguishes itself in industrial digital I/O with a blend of performance features designed for reliability and adaptability. Functionally, it offers rapid response times—critical in high-speed applications like packaging lines, where detecting a misaligned carton a millisecond too late can cause jams and production halts. Its 24V DC input range supports both sinking and sourcing configurations, providing the flexibility to work with nearly any discrete sensor on the market without signal converters.
Hardware design prioritizes durability and space efficiency. The compact module fits easily in crowded control cabinets, while its rugged construction withstands the vibration, temperature fluctuations, and electrical noise common in industrial environments. A key advantage is its galvanic isolation between channels, preventing signal interference that could cause false triggers—especially valuable in facilities with high electromagnetic interference from motors or welders.
Compatibility is another strength, with seamless integration into Modicon Momentum and Premium PLC systems, as well as Schneider’s EcoStruxure automation platform. This ensures the AS-B814-108 works smoothly with existing software tools for configuration and diagnostics, reducing training time for engineering teams.
AS-B814-108
Technical specifications:
Model AS-B814-108
Brand Schneider Electric
Type Digital Input Module
Number of Channels 16 isolated channels
Input Voltage Range 24V DC (15V to 30V DC)
Input Current 7mA per channel at 24V DC
Response Time <1ms typical
Operating Temperature -25°C to 70°C (-13°F to 158°F)
Mounting DIN rail (35mm)
Dimensions 110mm x 90mm x 62mm (W x H x D)
Weight 0.28 kg (0.62 lbs)
Certifications CE, UL, cUL, ATEX, IECEx
Isolation Galvanic isolation between channels
In industrial settings where precise control over machinery and processes is critical, digital input modules form the nervous system that keeps operations responsive and secure. From automated warehouses tracking pallet positions with photoelectric sensors to oil refineries monitoring valve statuses in hazardous zones, these modules must reliably capture discrete signals and relay them to central controllers. The AS-B814-108 excels in these high-demand environments, proving indispensable in scenarios where fast, accurate detection of on/off states directly impacts productivity and safety.
Consider a automotive paint shop, where dozens of proximity sensors monitor the position of car bodies as they move through cleaning, priming, and painting stations. A single missed signal could cause costly collisions or defective finishes. Here, the AS-B814-108processes these discrete inputs with consistent precision, ensuring the controller receives real-time data to adjust conveyor speeds and trigger spray patterns. In pharmaceutical manufacturing, it plays a similar role, tracking door interlocks and emergency stops in cleanrooms to maintain sterile conditions and comply with regulatory requirements. This module is a workhorse in industrial automation, providing the robust signal handling needed to keep complex systems synchronized and secure.
AS-B814-108
Related products:
AS-B814-104 – Compact variant with 8 channels, ideal for space-constrained applications requiring fewer input points.
AS-B824-108 – Digital output module that pairs with the AS-B814-108, converting controller signals to drive relays and contactors.
AS-B815-108 – High-speed digital input module with 10µs response time, designed for synchronization with the AS-B814-108 in precision motion control.
AS-B902-000 – Redundant power supply module ensuring uninterrupted operation of the AS-B814-108 in critical systems.
AS-B881-001 – Surge protection module that enhances the AS-B814-108’s durability in environments with frequent electrical transients.
AS-B814-116 – Higher-density version with 32 channels, compatible with the AS-B814-108 for scalable system expansion.
AS-B813-108 – Relay input module that works alongside the AS-B814-108 to handle AC signals from legacy equipment.
AS-B810-003 – Communication gateway connecting the AS-B814-108 to Modbus TCP networks for remote monitoring.
AS-B814-108
Installation and maintenance:
Before installing the AS-B814-108, verify that the control cabinet provides at least 20mm of clearance above and below to facilitate airflow, especially in high-temperature environments. Ensure proper grounding of the DIN rail to minimize ground loops, which can cause signal distortion. Check that the 24V DC power supply can deliver sufficient current—calculate 0.15A per module plus 7mA per active channel to avoid voltage drops during peak operation.
For maintenance, conduct visual inspections every three months to check for loose terminal screws or signs of corrosion, particularly in humid environments. Use the Modicon Programming Software monthly to run channel diagnostics, verifying each input responds correctly to test signals. While the AS-B814-108 requires minimal upkeep, clean terminal blocks annually with compressed air to prevent dust buildup that could cause intermittent connections.
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