SUNX FX-311P Fiber Optic Sensor Amplifier Unit

FX-311P is Panasonic/SUNX’s manually adjustable fiber optic amplifier that pairs with FX-311 fiber heads to deliver a robust PNP open-collector output. It operates from 12 to 24 V DC (±10%), with a ripple of 10% or less, and draws up to 35 mA at 24 V (840 mW max). A 12-turn front-mounted potentiometer lets you dial in the sensitivity for precise light-detection through 2.2 mm OD plastic fiber cables. The unit provides a maximum source current of 100 mA (50 mA if five or more amplifiers are cascaded) and a residual voltage of 1.5 V or less at 100 mA sink current, with an output mode you can select as Light-ON or Dark-ON. The FX-311P uses a red LED emitter and is designed specifically for SUNX FX-311 fiber systems, accommodating all standard 2.2 mm plastic fiber cables. For mounting, it can be attached to a 35 mm wide DIN rail, and SUNX quick-connection cables (CN-73 family) are available separately to connect the amplifier to controllers. A compact, single-board amplifier suitable for automation tasks in packaging, manufacturing lines, and other environments where minimal wiring and reliable optical sensing are required.