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CAUTIONS

2






This product has been developed / produced for industrial use only.

Make sure that the power supply is off while wiring.

Verify that the supply voltage variation is within the rating.

Take care that if a voltage exceeding the rated range is applied, or if an AC power 

supply is directly connected, the sensor may get burnt or damaged.

In case noise generating equipment (switching regulator, inverter motor, etc.) is 

used in the vicinity of this product, connect the frame ground (F.G.) terminal of the 

equipment to an actual ground.

If power is supplied from a commercial switching regulator, ensure that the frame 

ground (F.G.) terminal of the power supply is connected to an actual ground.

Do not use during the initial transient time (0.5 sec.) after the power supply is 

switched on.

Take care that short-circuit of the load or wrong wiring may burn or damage the 

sensor.

Do not run the wires together with high-voltage lines or power lines or put them in 

the same raceway. This can cause malfunction due to induction.

Make sure to use the optional quick-connection cable for the connection of the 

amplifier. Extension up to total 100m is possible with 0.3mm

2

, or more, cable.

However, in order to reduce noise, make the wiring as short as possible.

This sensor is suitable for indoor use only.

Avoid dust, dirt, and steam.

Take care that the sensor does not come in contact with water, oil, grease, organic 

solvents, such as, thinner etc., or strong acid, and alkaline.

This sensor cannot be used in an environment containing inflammable or 

explosive gases.

Never disassemble or modify the sensor.

Never use this product as a sensing device for personnel

protection.

In case of using sensing devices for personnel protection, use

products which meet standards, such as OSHA, ANSI or IEC

etc., for personnel protection applicable in each region or

country.

WARNING

SPECIFICATIONS

1

840mW or less (current consumption 35mA or less at 24V supply voltage)

Power consumption

12 to 24V DC

±

10% Ripple P-P 10% or less

Supply voltage

Blue LED type

Green LED type

Type

Red LED type

PNP output

FX-311BP

FX-311GP

FX-311P

FX-311B

FX-311G

NPN output

Model 

No.

FX-311

Item

Output

Selectable: 250

μ

s or 

less (for S-D, STD), 

2ms or less (for LONG)

Green LED (lights up under stable light-received condition or stable 

dark condition)

Stability indicator

Selectable: 150

μ

s or less (for FAST), 

250

μ

s or less (for STD), 2ms or less 

(for LONG)

Response time

Orange LED (lights up when the output is ON)

Operation indicator

Incorporated

Short-circuit protection

Selectable either Light-ON or Dark-ON

Output operation

Timer function

Incorporated with OFF-delay timer, selectable either effective

(approx. 10ms or 40ms) or ineffective

12-turn potentiometer with indicator (Pointer part: red backlight) (Note 2)

Sensitivity adjuster

Incorporated (up to four fibers can be mounted adjacently)

Interference prevention 

function

-10 to +55

 (If 4 to 7 units are connected in cascade: -10 to +50

,

if 8 to 16 units are connected in cascade: -10 to +45

)

(No dew condensation or icing allowed), Storage: -20 to +70

Ambient temperature

Green LED (modulated)

Red LED (modulated) Blue LED (modulated)

Enclosure: Heat-resistant ABS, Transparent cover: Polycarbonate

Material

15g approx.

Weight

35 to 85% RH, Storage: 35 to 85% RH

Ambient humidity
Emitting element

<NPN output type>

NPN open-collector transistor

Maximum sink current: 100mA (Note 1)

Applied voltage: 30V DC or less

(between output and 0V)

Residual voltage: 1.5V or less

[at 100mA (Note 1) sink current]

<PNP output type>

PNP open-collector transistor

Maximum source current: 100mA (Note 1)

Applied voltage: 30V DC or less

(between output and +V)

Residual voltage: 1.5V or less

[at 100mA (Note 1) source current]

Notes: 1) 

2) 

3) 

50mA if five, or more, amplifiers are connected together.

The red backlight of the pointer part lights up when the power is turned ON and when the 

sensitivity is adjusted.

The cable for amplifier connection is not supplied as an accessory. Make sure to use the 

optional quick-connection cables given below.

Main cable (3-core): 

CN-73-C1 

(cable length 1m), 

CN-73-C2 

(cable length 2m)

CN-73-C5 

(cable length 5m)

Sub cable (1-core):  

CN-71-C1 

(cable length 1m), 

CN-71-C2 

(cable length 2m)

CN-71-C5 

(cable length 5m)

MOUNTING

3

Fit the rear part of the mounting section of the amplifier 

on a 35mm width DIN rail.

Press down the rear part of the mounting section of the 

unit on the 35mm width DIN rail and fit the front part of 

the mounting section to the DIN rail.

How to mount the amplifier

35mm width DIN rail


Push the amplifier forward.

Lift up the front part of the amplifier to remove it.

Take care that if the front part is lifted without pushing the 

amplifier forward, the hook on the rear portion of the mounting 

section is likely to break.

Note: 

How to remove the amplifier

How to connect the fiber cables


Snap the fiber lock lever down.

Insert the fiber cables slowly into the inlets until they 

stop. (Note 1)

Return the fiber lock lever to the original position, till it 

stops.

Notes: 1) 

2) 

In case the fiber cables are not inserted to a position where 

they stop, the sensing range reduces. In case of a flexible 

fiber, take care that it may bend inside the amplifier, during 

insertion.

With the coaxial reflective type fiber, such as, 

FD-G4

 or 

FD-FM2

, insert the single-core fiber 

cable into the beam-emitting inlet and the multi-core fiber cable into the beam-receiving 

inlet. If they are inserted in reverse, the sensing accuracy will deteriorate.

Fiber

lock lever

Fiber

Be sure to fit the attachment to the fibers first before inserting the fibers to the 

amplifier. For details, refer to the instruction manual enclosed with the fibers.

CONNECTION

4

Make sure that the power supply is off while connecting or disconnecting the 

quick-connection cable.

Holding the connector of the quick-connection cable, align 

its projection with the groove at the top portion of the 

amplifier connector.

Insert the connector till a click is felt.

Pressing the projection at the top of the quick-connection

cable, pull out the connector.

Projection

Groove

Projection

Quick-connection cable

Connection method

Disconnection method

Take care that if the connector is pulled out without pressing the

projection, the projection may break. Do not use a

quick-connection cable whose projection has broken. Further, do

not pull by holding the cable, as this can cause a cable-break. 

Note: 



Make sure that the power supply is off while adding or removing the amplifiers.

Make sure to check the allowable ambient temperature, as it depends on the 

number of amplifiers connected in cascade.

In case two, or more, amplifiers are connected in cascade, make sure to mount 

them on a DIN rail.

When the amplifiers move on the DIN rail depending on the attaching condition, 

fitting them between the optional end plates (

MS-DIN-E

) mounted at the two ends.

When connecting in cascade, mount the amplifiers close to each other, fitting them 

between the optional end plates (

MS-DIN-E

) mounted at the two ends.

Up to maximum 15 amplifiers can be added (total 16 amplifiers connected in cascade.)

When connecting more than two amplifiers in cascade, use the sub cable (

CN-71-C

)

as the quick-connection cable for the second amplifier onwards.

The settings other than the interference prevention function cannot be transmitted 

between this product and other digital fiber amplifiers. Therefore, in case both 

models of amplifiers are mounted in cascade, be sure to mount identical models 

together.

CASCADING AMPLIFIERS

5

For mounting and removing the amplifier, refer to '     

MOUNTING

'.

3

Mount the amplifiers, one by 

one, on the 35mm width DIN 

rail and make them close each 

other.

Insert the connector of the 

quick-connection cable to the 

connector part of the amplifier.

Mount the optional end plates 

(

MS-DIN-E

) at both the ends 

to hold the amplifiers between 

their flat sides.

Tighten the screws to fix the 

end plates (

MS-DIN-E

).

Main cable (

CN-73-C

)

(optional)

Sub cable (

CN-71-C

)

(optional)

End plates (

MS-DIN-E

)

(optional)

End plates (

MS-DIN-E

)

(optional)

Pressing the projection at the 

top of the quick-connection 

cable, pull out the connector.

Remove the amplifier.

Cascading method

Dismantling

Thank you very much for purchasing Panasonic products. Please read this Instruction 

Manual carefully and thoroughly for the correct and optimum use of this product. 

Kindly keep this manual in a convenient place for quick reference.

INSTRUCTION MANUAL

Manual Setting Fiber Sensor Amplifire

FX-311

 Series

Ramco National

www.PanasonicSensors.com

1-800-280-6933

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