IN Brief:
- Control cabinets keep filling up, while fault-finding windows keep shrinking.
- S8AS2 consolidates DC power, electronic circuit protection, and monitoring in one unit.
- Branch-level shutdown is designed to keep healthy loads running during faults.
Omron has launched the S8AS2 smart power supply, combining a 24 VDC power stage with multi-branch electronic circuit protection, terminal connections, and on-device diagnostics in a single DIN-rail unit aimed at industrial control panels.
The product is presented as a consolidation play: instead of specifying a standalone power supply, separate circuit protectors, and additional terminal blocks, S8AS2 integrates those functions in one assembly, reducing panel parts count and the wiring work that tends to grow around it. In modern automation cabinets, the physical space is only half the issue; the other half is the time burned during commissioning, modifications, and fault isolation, especially when multiple low-power devices share a common 24 V rail.
S8AS2 is offered in 240 W and 480 W variants, rated at 10 A and 20 A respectively, with either six or eight output branches depending on the model. Omron specifies a maximum of 3.8 A per branch, and the outputs are UL Class 2 compliant, supporting safer distribution design and easing compliance for low-voltage control wiring. Input range is quoted at 85–264 VAC, with a rated supply voltage of 100–240 VAC, and the unit uses Push-in Plus terminals intended to speed up wiring compared with screw terminals.
Protection is implemented per branch, with independent electronic circuit protection so that an overload or short circuit on one output shuts down only the affected channel, rather than collapsing the whole 24 V bus. For panel builders and maintenance teams, that behaviour is often the difference between a nuisance stop and a controlled, diagnosable fault, particularly where multiple sensors, I/O islands, valves, and small controllers share a common distribution block.
Monitoring is built into the unit, including a digital display for output voltage, current, temperature, and a replacement timing indicator. Status indication extends to branch-level LEDs, intended to show whether a given circuit is operating within current limits or has tripped and raised an alarm. Omron’s published material also points to design choices intended to support higher power density and heat management, including GaN adoption for improved heat dissipation, alongside an “automatic current control” approach in the protection section to reduce heat generation under load.
There is no communication port specified on the platform, with alarm output handled via transistor signalling. That positions the S8AS2 as a practical hardware layer for smarter power distribution, rather than a networked power-management node, which will suit many panels where simplicity and serviceability outweigh the need for granular data logging over fieldbus.
Omron says the unit has been proven in automotive environments, where vibration, ambient heat, and dense packaging are normal. For integrators standardising on 24 VDC architectures across multiple lines, consolidating power and protection can be a straightforward way to reduce build variation, shorten troubleshooting, and keep unaffected devices online when one branch misbehaves.
