BEI Sensors GHM9 Incremental Shaft Encoder - Manual (Page 2)

GHM9
OVERSPEED SPEED SWITCH, GHM9 SERIES
CHARACTERISTICS
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%
The commutation speed n
s
is definitely calibrated in
our factory.
Right or left rotation direction.
The switching speed n
s
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 n
s
in order
that n
s
> 1,15.n
n
(n
n
: 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 n
s.
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
.
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.
Made in France
Changes possible without further notice - Version 121106
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 : [email protected]
Web : www.beisensors.com