What this Festo photoelectric sensor does on a 24V DC line
The Festo SME-10M-ZS-24V-E-2 is a photoelectric sensor running on 24V DC — the standard control voltage for most industrial sensor networks, so it drops straight into an existing 24V DC power supply without a separate converter.
Where this sensor fits in a panel or on a machine
As a photoelectric sensor, it detects the presence or absence of an object by emitting a light beam and measuring the reflection or interruption — common on conveyor lines, packaging machines, and material-handling stations where non-contact detection is required. The 24V DC supply means it can share a power rail with PLC digital inputs and other 24V field devices, keeping the panel wiring simple and the power budget predictable.