BEI Sensors GHM9 User Manual
Material
Cover : zinc alloy
Weight
1,10kg
Body: aluminium
Operating temperature
-30 … +130°C
Max. speed
1,5 . ns
IP(EN 60529)
IP 65 (mounted)
BEI Sensors
Espace Européen de l’Entreprise
9, rue de Copenhague
B.P. 70044 Schiltigheim
F 67013 Strasbourg Cedex
Tél : +33 (0)3 88 20 80 80
Fax : +33 (0)3 88 20 87 87
Mail : info@beisensors.com
Web : www.beisensors.com
GHM9
OVERSPEED SPEED SWITCH, GHM9 SERIES
The overspeed switch function on the 90mm range – a sturdy mechanical security module without external power supply:
radial commutation centrifugal switch without permanent contact.
high quality mechanics reliability.
excellent repeatability.
securised system, works without power supply.
modular mounting possibility.
commutation speed : standard calibration range between 800 and 4 000 rpm (rotation per minute).
Especially designed for heavy duty industry (steel and paper mills, lumber, cranes, engine etc...). Sturdy compact conception.
Excellent resistance to shocks/vibrations and to extreme axial/radial loads.
12mm or 11mm solid shaft with 115mm REO (Euroflange B10) for tacho-generator type mounting.
Solid shaft GHM9_11 with overspeed switch Solid shaft GHM9_12 with overspeed switch
The compactness of the assembly, which can be proposed by BEI SENSORS, allows the combination of overspeed switch and encoder
presenting a particularly interesting cost / performances relation.
EXAMPLE: INCREMENTAL ENCODER GHM9_11 WITH OVERSPEED SWITCH
CENTRIFUGAL SWITCH CHARACTERISTICS
Changes possible without further notic e - Version 121106
Switching speed
800 … 4 000 rpm
Max current
6 A / 240 Vac
Principle
centrifugal
Contact material
silver-cadmium
Mechanical life-time
500 000 cycles
Maximum breaking sequence
4/min
Contact type
opened or closed
Breaking accuracy
min-1 - 5% … +8%
BEI Sensors
Espace Européen de l’Entreprise
9, rue de Copenhague
B.P. 70044 Schiltigheim
F 67013 Strasbourg Cedex
Tél : +33 (0)3 88 20 80 80
Fax : +33 (0)3 88 20 87 87
Mail : info@beisensors.com
Web : www.beisensors.com
GHM9
OVERSPEED SPEED SWITCH, GHM9 SERIES
CHARACTERISTICS
The commutation speed ns is definitely calibrated in
our factory.
Right or left rotation direction.
The switching speed ns is defined for an acceleration =
100 s-2 (other, consult us).
Nota: 1 rad.s-2 ↔ 9,55 rpm.s
-1
The hysteresys is about –3% in counter clockwise
direction compared with clockwise direction.
It is advised to choose the switching speed ns in order
that ns > 1,15.nn (nn: working speed, nominal speed).
The centrifugal relay must be used only in the case of
an increasing speed.
In decreasing speed, the centrifugal switch will open
automatically at a slower speed of approximately 40%
of the calibrated switching speed ns.
STANDARD CONNECTION
With 4 pinout solenoid valve connector.
Contact 1 to 3 can be connected
according to the desired configuration
(rest, work or opposite).
The earth pin of the connector must be
connected to the ground of the
installation.
AVAILABLE COMBINATION (Consult us for special version: ex: flange / connection / specific speed...)
Available combination:
- incremental encoder + overspeed switch,
- tacho-encoder + overspeed switch,
- absolute encoder + overspeed switch,
- incremental encoder + opto-tacho + overspeed switch,
- overspeed switch + overspeed switch …
Standard speeds (rpm) : 1 000, 1 200, 1 500, 1 800, 3 000 (consult us for other speed).
Reference: consult us.
Note : The switch commutation speed is calibrated in our factory, no correction and no later modification is possible.
In the case of a higher acceleration than 100 s-2, the switching speed will
be higher (n’s, cf here-under drawing).
Shocks / impacts can create premature switching or transient opening.
This is particulary the case when the switch’s direction of action and the
shock are the same. Rotating the mounting position (60° division on
flange) reduces the problem.
Made in France
Changes possible without further notic e - Version 121106
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