The optical head and amplifier are connected with a fiber optic cable and the infrared ray captured with the optical head is transmitted through highly transmissive glass fiber into an amplifier installed at a distant location. The infrared ray transmitted into the amplifier is optically converted in the light sensitive element and amplified for control signal output (mini power relay, signal relay or solid state output).
Sensors for low temperature (FD300A Series) and medium/high temperature (FD600A Series) are available.

• No cooling required
  The optical head integrating hood and optical lens and fiber optic cable have no electronic component, which allows use in ambient temperature of up to 200 C without cooling.
• Excellent durability
  Reliable design with the hood and optical head made of metal, fiber optic cable covered with flexible stainless steel braid and metal cased amplifier provides robustness and resistance to heat and corrosion.
• 5 point level indicator
  Received light intensity is indicated at 5 levels, offering easy viewing of stability.
• Self check feature integrated (SAFETY feature)
  Operation can be checked with external signal.
  Stability check feature is provided, which outputs alarm signal (SAFETY ALARM) when there is not much margin in the received light intensity level at detection due to soiling of lens, light axis misalignment, etc. or external disturbing light or residual heat.
• Two types of detection field of view
  Standard vew (dia.50mm/m) and Wide view (200x40mm/m, 400x30mm/m) are available.

Amplifier unit

Fiber optic cable

Control output

SAFETY ALARM output (all models)

When connecting an inductive load such as relay, be sure to use diode, surge absorber, etc. to protect output transistors from counter electromotive force.

Connection

When connecting an inductive load such as relay as the load, be sure to use diode, surge absorber, etc. for protection of output transistor from back electromotive force.
• When the leads are extended (100-300 m), stray capacitance between leads may cause rush current. If this poses any problem, provide a resistor (10-50 Ω) in series with the contact.
• Ground from frame
  Connect to the ground screw (M4) near the connector. You do not have to connect when already connected to the ground Pin.1 with a cable.

Optical head

	Optical headOHA	Description Optical head (Standard view)
	Optical headOHW1	Description Optical head (Wide view)
	Optical headOHW2	Description Optical head (Wide view)

Hood

	HoodF38A	Description Airless hood (Standard view) Length 120mm Applicable optical head OHA OHAN OHAN10
	HoodF38A-02	Description Airless hood (Standard view) Length 200mm Applicable optical head OHA OHAN OHAN10
	HoodF38A-03	Description Airless hood (Standard view) Length 300mm Applicable optical head OHA OHAN OHAN10
	HoodF38A-04	Description Airless hood (Standard view) Length 400mm Applicable optical head OHA OHAN OHAN10
	HoodF38A-05	Description Airless hood (Standard view) Length 500mm Applicable optical head OHA OHAN OHAN10
	HoodF38W	Description Airless hood (Wide view) Length 200mm Applicable optical head OHW1 OHW2
	HoodF38PC-02	Description Air purge hood (Standard view) Length 200mm Applicable optical head OHA OHAN OHAN10
	HoodF38PC-03	Description Air purge hood (Standard view) Length 300mm Applicable optical head OHA OHAN OHAN10
	HoodF38PC-04	Description Air purge hood (Standard view) Length 400mm Applicable optical head OHA OHAN OHAN10
	HoodF38PC-05	Description Air purge hood (Standard view) Length 500mm Applicable optical head OHA OHAN OHAN10
	Hood302W	Description Air purge hood (Wide view ) Applicable optical head OHW1 OHW2

Fiber optic cable

	Fiber optic cableFG2	Description Fiber optic cable Length 2m
	Fiber optic cableFG3	Description Fiber optic cable Length 3m
	Fiber optic cableFG4	Description Fiber optic cable Length 4m
	Fiber optic cableFG5	Description Fiber optic cable Length 5m
	Fiber optic cableFG7	Description Fiber optic cable Length 7m
	Fiber optic cableFG10	Description Fiber optic cable Length 10m
	Fiber optic cableFG15	Description Fiber optic cable Length 15m
	Fiber optic cableFG20	Description Fiber optic cable Length 20m
	Fiber optic cableFG30	Description Fiber optic cable Length 30m