Panasonic Industry / Automation Controls
Panasonic Industry / Automation Controls

Compact Inductive Proximity Sensor GA-311/GH

  • Basic Information

  • Applications

  • Order guide

  • Option

  • Specifications

  • Dimensions

  • Circuit/ Wiring

  • Sensing characteristics

  • Cautions For Use

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Basic Information

High-speed response and excellent workability

UL Approved

UL : Recognition

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Applications

Detecting small metal parts
小型金属部品の検出
Detecting rotation of a gear
歯車の回転検出

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Order guide

Sensor heads

TypeAppearance
(mm in)
Sensing range
(Note)
Model No.Hysteresis
Maximum operation distanceStable sensing range
Cylindrical
type
 

1.2mm
0.047 in
0 to 0.6 mm
0 to 0.024 in
GH-2SE0.07 mm 0.0028 in or less

1.8mm
0.071 in
0 to 0.8 mm
0 to 0.031 in
GH-3SE0.05 mm 0.0020 in or less

2.4mm
0.094 in
0 to 1.0 mm
0 to 0.039 in
GH-5SE

4.0mm
0.157 in
0 to 2.0 mm
0 to 0.079 in
GH-8SE0.04 mm 0.0016 in or less
Spatter
resistant
type
GH-F8SE

Note : The stable sensing range represents the sensing range for which the sensor can satisfy all the given specifications with the standard sensing object.
The maximum operation distance represents the maximum distance for which the sensor can detect the standard sensing object at +20 ℃ +68 ℉ constant ambient temperature.
Usage within the stable sensing range is recommended for accurate sensing applications.

Amplifier

Quick-connection cable is not supplied with the amplifier. Please order it separately.

TypeAppearanceModel No.Output
Connector
type

GA-311NPN open-collector transistor

Quick-connection cable

Quick-connection cable is not supplied with the amplifier. Please order it separately.

TypeModel No.Description
Main cable
(3-core)
CN-73-C1Length: 1 m 3.281 ft0.2 mm2 3-core cabtyre cable, with connector on one end
Cable outer diameter: ø3.3 mm ø0.130 in
CN-73-C2Length: 2 m 6.562 ft
CN-73-C5Length: 5 m 16.404 ft
Sub cable
(1-core)
CN-71-C1Length: 1 m 3.281 ft0.2 mm2 1-core cabtyre cable, with connector on one end
Cable outer diameter: ø3.3 mm ø0.130 in
CN-71-C2Length: 2 m 6.562 ft
CN-71-C5Length: 5 m 16.404 ft

(Note): The material of Quick-connection cable will be changed from production in March 2013, as soon as the previous ones are shipped out.
・Conductor cross-sectional area has been changed from 0.15mm2 to 0.2mm2.
・Sheath diameter has been changed from ø3.0mm to ø3.3mm.

Main cable

CN-73-C口

CN-73-C口

Sub cable

CN-71-C口

CN-71-C口

End plates

End plates are not supplied with the amplifier. Please order them separately when the amplifiers are mounted in cascade.

AppearanceModel No.Description

MS-DIN-EWhen cascading multiple amplifiers, or when it moves depending on the way it is installed on a DIN rail, these end plates clamp amplifiers into place on both sides.
Make sure to use end plates when cascading multiple amplifiers together.
[ 2 pcs. per set ]

------------------------------ Tab4 showing ------------------------------

Option

DesignationModel No.Description
Amplifier mounting
bracket
MS-DIN-2Mounting bracket for amplifier
Sensor head
mounting bracket
MS-SS3Mounting bracket for GH-3SE
MS-SS5Mounting bracket for GH-5SE
MS-SS8Mounting bracket for GH-8SE

Amplifier mounting bracket

MS-DIN-2

MS-DIN-2

Sensor head mounting bracket

MS-SS口

MS-SS口
The sensor head can be easily fixed.

------------------------------ Tab5 showing ------------------------------

Specifications

Sensor heads

TypeCylindrical type
 Spatter-
resistant
type
Model No.GH-2SEGH-3SEGH-5SEGH-8SEGH-F8SE
Applicable amplifierGA-311
Stable sensing range
(Note 2)
0 to 0.6 mm
0 to 0.024 in
0 to 0.8 mm
0 to 0.031 in
0 to 1.0 mm
0 to 0.039 in
0 to 2.0 mm
0 to 0.079 in
Max. operation distance
(Note 2)
1.2 mm
0.047 in
1.8 mm
0.071 in
2.4 mm
0.094 in
4.0 mm
0.157 in
Standard sensing objectIron sheet 5 × 5 × t 1 mm
0.197 × 0.197 × t 0.039 in
Iron sheet 10 × 10 × t 1 mm 0.394 × 0.394 × t 0.039 in
Hysteresis
(Note 3)
0.07 mm
0.003 in or less
0.05 mm
0.002 in or less
0.04 mm
0.002 in or less
Repeatability
(Note 3)
Along sensing axis, perpendicular to sensing axis: 1 μm 0.039 mil or less
ProtectionIP50 (IEC)IP67 (IEC), IP67G (Note 4)
Ambient temperature-10 to +60 ℃ 14 to +140 ℉, Storage: -20 to +70 ℃ -4 to +158 ℉
Ambient humidity35 to 85 % RH, Storage: 35 to 85 % RH
Vibration resistance10 to 55 Hz frequency, 1.5 mm 0.059 in double amplitude in X, Y and Z directions for two hours each
Shock resistance500 m/s2 acceleration (50 G approx.) in X, Y and Z directions five times each
Temperature characteristics
(Note 5)
Within ±7 %Within ±5 %Within ±4 %
MaterialEnclosure: Stainless steel (SUS303)
Sensing part: PVC
Enclosure: Stainless steel (SUS303)
Sensing part: ABS
Enclosure: Stainless steel (SUS303)
Sensing part: PAR
Enclosure: Stainless steel (SUS303)
Sensing part: ABS
Enclosure: Stainless steel (SUS303)
Sensing part: Fluorine resin
Cable (Note 6)Oil-resistant [Spatter-resistant type: Spatter-resistant cable (Sheath: Fluorine resin)] high-frequency coaxial cable,
3 m 9.843 ft long, with a connector at the end
WeightNet weight: 15 g approx.
Gross weight: 30 g approx.
Net weight: 35 g approx.
Gross weight: 45 g approx.
Net weight: 40 g approx.
Gross weight: 55 g approx.
Net weight: 55 g approx.
Gross weight: 70 g approx.

Notes:

1) Where measurement conditions have not been specified precisely, the conditions used were an ambient temperature of +23 ℃ +73.4 ℉.

2) The stable sensing range represents the sensing range for which the sensor can satisfy all the given specifications with the standard sensing object.
The maximum operation distance represents the maximum distance for which the sensor can detect the standard sensing object at +20 ℃ +68 ℉ constant ambient temperature.
Usage within the stable sensing range is recommended for accurate sensing applications.

3) The hysteresis and the repeatability are specified for the standard sensing object within the stable sensing range.

4) The length of the sensor head cable cannot be changed.

5) If using the sensor in an environment where cutting oil droplets splatter, the sensor may deteriorate due to added substances in the oil.
Please check the resistivity of the sensor against the cutting oil you are using beforehand.

6) The value represents the variation in the operation distance, that has been set within the stable sensing range at +20 ℃ +68 ℉, for an ambient temperature drift from 0 to +55 ℃ +32 to +131 ℉. (Values are for sensor head only.)

Amplifier

Model No.GA-311
Applicable sensor headGH-□SE
Supply voltage12 to 24 V DC ± 10 % Ripple P-P 10 % or less
Current consumption25 mA or less
OutputNPN open-collector transistor
・Maximum sink current: 100 mA (50 mA, if five, or more, amplifiers are connected in cascade.)
・Applied voltage: 30 V DC or less (between sensing output and 0 V)
・Residual voltage: 1 V or less [at 100 mA (at 50 mA, if five, or more, amplifiers are connected in cascade) sink current.]
 Output operationSwitchable either Normally open or Normally closed
Short-circuit protectionIncorporated
Max. response frequency3.3 kHz
Operation indicatorOrange LED (lights up when the output is ON)
Disconnection alarm indicatorRed LED (lights up when the sensor head cable is disconnected or misconnected)
Sensitivity adjuster18-turn potentiometer
Ambient temperature-10 to +60 ℃ +14 to +140 ℉ (If 4 to 7 units are connected in cascade : -10 to +50 ℃ +14 to +122 ℉, if 8 to 16 units are connected in cascade: -10 to +45 ℃ +14 to +113 ℉)
(No dew condensation or icing allowed),
Storage: -20 to +70 ℃ -4 to +158 ℉
Ambient humidity35 to 85 % RH, Storage: 35 to 85 % RH
Voltage withstandability1,000 V AC for one min. between all supply terminals connected together and enclosure
Insulation resistance20 MΩ, or more, with 250 V DC megger between all supply terminals connected together and enclosure
Vibration resistance10 to 150 Hz frequency, 0.75 mm double amplitude or maximum acceleration 49 m/s2 in X, Y, and Z direction for 2 hours each
Shock resistance100 m/s2 acceleration (10 G approx.) in X, Y and Z directions three times each
Temperature characteristics (Note 2)Within ±5 %
MaterialEnclosure: PBT, Cover: Polycarbonate
Connecting methodConnector (Note 3)
Cable lengthTotal length up to 100 m 328.084 ft (if 5 to 8 units are connected in cascade: 50 m 164.042 ft,
if 9 to 16 units are connected in cascade: 20 m 65.617 ft) is possible with 0.3 mm2, or more, cable.
WeightNet weight: 15 g approx., Gross weight: 40 g approx.

Notes:

1) Where measurement conditions have not been specified precisely, the conditions used were an ambient temperature of +23 ℃ +73.4 ℉.

2) The value of the temperature characteristics gives the variation in the operation distance, that has been set within the stable sensing range at +20 ℃ +68 ℉, for an ambient temperature drift from 0 to +55 ℃ +32 to +131 ℉. (Value is for amplifier only.)

3) The cable for amplifier connection is not supplied as an accessory. Make sure to use the optional quick-connection cable given below.
Main cable (3-core): CN-73-C1 (cable length 1 m 3.281 ft), CN-73-C2 (cable length 2 m 6.562 ft), CN-73-C5 (cable length 5 m 16.404 ft)
Sub cable (1-core): CN-71-C1 (cable length 1 m 3.281 ft), CN-71-C2 (cable length 2 m 6.562 ft), CN-71-C5 (cable length 5 m 16.404 ft)

------------------------------ Tab6 showing ------------------------------

Dimensions

Unit: mm in

GA-311

Amplifier

GA-311

Note:The front view shows the sensor head connector and quick-connection cable connector attached.The top view is without the sensor head connector, quick-connection cable and the cover.

GH-2SE GH-3SE GH-5SE GH-8SE GH-F8SE

Sensor head

GH-2SE GH-3SE GH-5SE GH-8SE GH-F8SE

Model No.ABC
GH-2SEø2.8 ø0.11012 0.472ø1.6 ø0.063
GH-3SEø3.8 ø0.15015 0.591ø2.5 ø0.098
GH-5SEø5.4 ø0.21315 0.591ø2.5 ø0.098
GH-8SEø8.0 ø0.31515 0.591ø2.5 ø0.098
GH-F8SEø8.0 ø0.31515 0.591ø2.65 ø0.104

CN-73-C1 CN-73-C2 CN-73-C5

Main cable (Optional)

CN-73-C1 CN-73-C2 CN-73-C5

• Length L

Model No.Length L
CN-73-C11,000 39.370
CN-73-C22,000 78.740
CN-73-C55,000 196.850

CN-71-C1 CN-71-C2 CN-71-C5

Sub cable (Optional)

CN-71-C1 CN-71-C2 CN-71-C5

• Length L

Model No.Length L
CN-71-C11,000 39.370
CN-71-C22,000 78.740
CN-71-C55,000 196.850

MS-DIN-2

Amplifier mounting bracket (Optional)

MS-DIN-2

Material:Cold rolled carbon steel (SPCC) (Uni-chrome plated)

MS-DIN-E

End plate (Optional)

MS-DIN-E

Material:Polycarbonate

MS-SS3 MS-SS5 MS-SS8

Sensor head mounting bracket (Optional)

MS-SS3 MS-SS5 MS-SS8

Material:Nylon 66

SymbolMS-SS3MS-SS5MS-SS8
D16 0.63018 0.70920 0.787
E9 0.35410 0.39411 0.433
F6.3 0.2488.3 0.32710.3 0.406
G4.9 0.1936.1 0.2406.5 0.256
Applicable sensor head
model No.
GH-3SEGH-5SEGH-8SE

------------------------------ Tab7 showing ------------------------------

I/O Circuit and Wiring diagrams

I/O circuit diagram

I/O circuit diagram

Note: The quick-connection sub cable does not have +V (brown) and 0 V (blue). The power is supplied from the connector of the main cable.

Symbols・・・
D : Reverse supply polarity protection diode
ZD: Surge absorption zener diode
Tr : NPN output transistor

Wiring diagram

Wiring diagram

Note:The quick-connection sub cable does not have brown lead wire and blue lead wire.

Connector pin position

Connector for sensor head
pic03
Connector for power supply
pic04

------------------------------ Tab8 showing ------------------------------

Sensing characteristics

(TYPICAL)

GH-2SE

Sensing field
Sensing field

The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 0.6 mm 0.024 in.

Correlation between sensing object size and sensing range
Correlation between sensing object size and sensing range

As the sensing object size becomes smaller than the standard size (iron sheet 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in), the sensing range shortens as shown in the left figure.

(The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 0.6 mm 0.024 in.)

GH-3SE

Sensing field
Sensing field

The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 0.8 mm 0.031 in.

Correlation between sensing object size and sensing range
Correlation between sensing object size and sensing range

As the sensing object size becomes smaller than the standard size (iron sheet 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in), the sensing range shortens as shown in the left figure.

(The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 0.8 mm 0.031 in.)

GH-5SE

Sensing field
Sensing field

The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 1.0 mm 0.039 in.

Correlation between sensing object size and sensing range
Correlation between sensing object size and sensing range

As the sensing object size becomes smaller than the standard size (iron sheet 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in), the sensing range shortens as shown in the left figure.

(The graph on the left is plotted with the sensitivity adjusted so as to just detect a 5 × 5 × t 1 mm 0.197 × 0.197 × t 0.039 in iron sheet placed at a distance of 1.0 mm 0.039 in.)

GH-8SE GH-F8SE

Sensing field
Sensing field

The graph on the left is plotted with the sensitivity adjusted so as to just detect a 10 × 10 × t 1 mm 0.394 × 0.394 × t 0.039 in iron sheet placed at a distance of 2.0 mm 0.079 in.

Correlation between sensing object size and sensing range
Correlation between sensing object size and sensing range

As the sensing object size becomes smaller than the standard size iron sheet 10 × 10 × t 1 mm 0.394 × 0.394 × t 0.039 in), the sensing range shortens as shown in the left figure.

(The graph on the left is plotted with the sensitivity adjusted so as to just detect a 10 × 10 × t 1 mm 0.394 × 0.394 × t 0.039 in iron sheet placed at a distance of 2.0 mm 0.079 in.)

------------------------------ Tab9 showing ------------------------------

Cautions For Use

  • Never use this product as a sensing device for personnel protection.
  • In case of using sensing devices for personnel protection, use products which meet laws and standards, such as OSHA, ANSI or IEC etc., for personnel protection applicable in each region or country.
  • Always be sure to use sensor heads and amplifiers from the same set
  • Do not shorten or lengthen the sensor head cable.

Mounting of the sensor head

How to mount the sensor head

  • The tightening torque should be as given below. Make sure to use a set screw with a cup-point end.

pic01

Model No.Tightening torqueA (mm in)
GH-2SE0.17N·m3 0.118 or more
GH-3SE0.17N·m4 0.157 or more
GH-5SE0.78N·m5 0.197 or more
GH-8SE
GH-F8SE
0.59N·m5 0.197 or more

Note: Do not tighten excessively.

Distance from surrounding metal

  • If there is a metal near the sensor head, it may affect the sensing performance.
    Keep the minimum distance specified in the table below.

pic02

Model No.B (mm in)
GH-2SE3 0.118
GH-3SE4 0.157
GH-5SE5 0.197
GH-8SE
GH-F8SE
9 0.354

Mutual interference

  • When two or more sensors are installed in parallel or face to face, keep the minimum separation distance specified below to avoid mutual interference.
Face to face mounting
Face to face mounting
Parallel mounting
Parallel mounting
Model No.C (mm in)D (mm in)
GH-2SE15 0.59110 0.394
GH-3SE20 0.78715 0.591
GH-5SE25 0.98420 0.787
GH-8SE
GH-F8SE
40 1.57526 1.024

Sensing range

  • The sensing range is specified for the standard sensing object. With a non-ferrous metal, the sensing range is obtained by multiplying with the correction coefficient specified below. Further, the sensing range also changes if the sensing object is smaller than the standard sensing object or if the sensing object is plated.

Correction coefficient

 
 GH-2SEGH-3SEGH-5SEGH-8SE
GH-F8SE
Iron1111
Stainless steel (SUS304)0.68 approx.0.55 approx.0.69 approx.0.64 approx.
Brass0.53 approx.0.35 approx.0.41 approx.0.37 approx.
Aluminum0.51 approx.0.33 approx.0.39 approx.0.32 approx.

Others

  • Do not use during the initial transient time (0.5 sec.) after the power supply is switched on.
  • Do not use the sensor at places having intense vibrations, as this can cause malfunction.
  • Make sure that stress by forcible bend or pulling is not applied directly to the cable joint of the sensor head.

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