FSN10
Keyence FS-N10, Digital Fiber Optic Sensors, Amplifier, Zero-Line Expansion Unit
You will find that these inserts are compatible with most standard trays.
KEYENCE FS-N10 DIGITAL FIBER AMPLIFIER EXPANSION UNIT 12-24VDC RED LED NIB
You will find that the unthemed design makes it a blank slate for your own creative ideas.