The AS-S908-120RP is a redundant power distribution module designed as a key component in Schneider Electric’s Modicon Quantum safety systems. As part of the company’s industrial power management portfolio, it acts as a central hub for distributing 120V AC power to connected automation devices, combining robust switching capabilities with advanced protection features to prevent electrical faults from propagating through control systems.
Model AS-S908-120RP
Brand Schneider Electric
Type Redundant Power Distribution Module
Input Voltage 120V AC (100-130V AC range)
Output Circuits 8 individually protected channels
Maximum Output Current 10A per channel, 30A total
Protection Features Overcurrent, short circuit, overload
Operating Temperature -5°C to 60°C (23°F to 140°F)
Mounting DIN rail (35mm) or panel mount
Dimensions 220mm x 160mm x 100mm (W x H x D)
Weight 2.1 kg (4.63 lbs)
Certifications CE, UL 508, cUL, ATEX
Redundancy Dual input power with automatic failover
The AS-S908-120RP is a redundant power distribution module designed as a key component in Schneider Electric’s Modicon Quantum safety systems. As part of the company’s industrial power management portfolio, it acts as a central hub for distributing 120V AC power to connected automation devices, combining robust switching capabilities with advanced protection features to prevent electrical faults from propagating through control systems.
AS-S908-120RP
Its primary role is to manage power distribution to critical components like PLCs, I/O modules, and communication adapters, while providing real-time status monitoring to alert operators of potential issues. For engineers and plant managers, the AS-S908-120RPoffers significant value through its redundant design and hot-swappable components, eliminating single points of failure in power systems. Whether deployed in standalone control cabinets or large-scale distributed networks, this module integrates seamlessly with existing infrastructure, enhancing system resilience while simplifying power management.
AS-S908-120RP
Main features and advantages:
TheAS-S908-120RP stands out in industrial power distribution with features engineered for reliability and safety. Functionally, it delivers redundant power paths with automatic failover, ensuring connected devices continue operating even if one power source or distribution channel fails—critical in applications like nuclear power plant control systems where downtime is unacceptable. Its built-in overload protection trips within milliseconds of detecting excessive current, preventing damage to sensitive electronics while minimizing disruption to non-affected circuits.
Hardware design prioritizes durability and serviceability. The rugged metal enclosure withstands operating temperatures from -5°C to 60°C, making it suitable for installation in both climate-controlled electrical rooms and unconditioned industrial spaces. A key advantage is its hot-swappable fuse modules, which allow replacement of blown fuses without powering down the entire system—a feature that reduces maintenance-related downtime in continuous-process facilities.
Compatibility is a strong suit, with seamless integration with Modicon Quantum PLC systems and other Schneider automation components like the AS-P890-000R building automation server and AS-S908-120RP digital input modules. This versatility allows the AS-S908-120RP to serve as a universal power distribution solution across multiple industrial platforms, simplifying inventory management for plant operators.
AS-S908-120RP
Technical specifications:
Model AS-S908-120RP
Brand Schneider Electric
Type Redundant Power Distribution Module
Input Voltage 120V AC (100-130V AC range)
Output Circuits 8 individually protected channels
Maximum Output Current 10A per channel, 30A total
Protection Features Overcurrent, short circuit, overload
Operating Temperature -5°C to 60°C (23°F to 140°F)
Mounting DIN rail (35mm) or panel mount
Dimensions 220mm x 160mm x 100mm (W x H x D)
Weight 2.1 kg (4.63 lbs)
Certifications CE, UL 508, cUL, ATEX
Redundancy Dual input power with automatic failover
AS-S908-240RP – 240V AC variant of the AS-S908-120RP, ideal for facilities with higher voltage distribution systems.
AS-J890-101-1004 – Redundant power supply that pairs with the AS-S908-120RP to create complete protected power chains.
AS-B883-200 – Surge protection module recommended for use with the AS-S908-120RP to safeguard against voltage transients.
AS-S904-120P – Non-redundant 4-channel version, suitable for less critical systems alongside the AS-S908-120RP.
VW3A9110 – Power monitoring module that connects to the AS-S908-120RP for real-time current and voltage tracking.
AS-P890-000R – Building automation server commonly powered through the AS-S908-120RP in critical facilities.
AS-Q800-000 – Quantum rack interface that receives power from the AS-S908-120RP for PLC systems.
AS-S916-120RP – 16-channel expansion module that works with the AS-S908-120RP in high-density power distribution setups.
AS-S908-120RP
Related products:
AS-S908-240RP – 240V AC variant of the AS-S908-120RP, ideal for facilities with higher voltage distribution systems.
AS-J890-101-1004 – Redundant power supply that pairs with the AS-S908-120RP to create complete protected power chains.
AS-B883-200 – Surge protection module recommended for use with the AS-S908-120RP to safeguard against voltage transients.
AS-S904-120P – Non-redundant 4-channel version, suitable for less critical systems alongside the AS-S908-120RP.
VW3A9110 – Power monitoring module that connects to the AS-S908-120RP for real-time current and voltage tracking.
AS-P890-000R – Building automation server commonly powered through the AS-S908-120RP in critical facilities.
AS-Q800-000 – Quantum rack interface that receives power from the AS-S908-120RP for PLC systems.
AS-S916-120RP – 16-channel expansion module that works with the AS-S908-120RP in high-density power distribution setups.
AS-S908-120RP
Installation and maintenance:
Before installing the AS-S908-120RP verify that input power sources are properly rated and protected by appropriately sized circuit breakers (15A recommended). Ensure the mounting location provides adequate clearance—minimum 100mm above and below for heat dissipation, especially when operating at currents exceeding 20A total. For redundant configurations, connect each input to separate phase legs or independent power sources to maximize fault tolerance. Check that output wiring uses conductors rated for at least 10A (minimum 14 AWG) and that all ground connections are properly bonded to the facility’s earthing system.
For maintenance, inspect fuse status indicators monthly to identify blown fuses before they affect critical operations. Test redundant failover functionality quarterly by disconnecting one input power source and verifying all outputs remain operational. Clean dust from ventilation grilles semi-annually using compressed air, particularly in dusty environments like cement plants. When replacing fuses in the AS-S908-120RP, use only Schneider-approved components with the specified current rating to maintain safety certifications and protection characteristics.
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