BEI Sensors PHU9 Absolute Hollow Shaft Encoder - Manual (Page 7)

PROFIBUS USER MANUAL
Preliminary 7
BEI IDEACOD SAS
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Mail :
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Web : www.bei-ideacod.com
2.3 Connecting the screen
To achieve the highest possible noise immunity
shielded cables should be used for data
transmission. The shield should be connected
to ground on both ends of the cable. In certain cases, a compensation current might
flow over the shield. Therefore a potential
compensation cable is recommended.
2.4 Instructions for mechanical installation and electrical connection of the angular encoder
The following points should be observed:
•
Do not drop the angular encoder or
subject it to excessive vibration. The
encoder is a precision device.
•
Do not open the angular encoder
housing (this does not mean that you
cannot remove the connection cap). If
the device is opened and closed again,
it can be damaged and dirt may enter
the unit.
•
The angular encoder shaft must be
connected to the shaft to be measured
through a suitable coupling (full shaft
version). This coupling is used to dampen
vibrations and imbalance on the
encoder shaft and to avoid inadmissible
high forces. Suitable couplings are
available from BEI IDEACOD.
•
Although BEI IDEACOD absolute
encoders are rugged, when used in
tough ambient conditions, they should be
protected against damage using suitable
protective measures. The encoder should
not be used as handles or steps.
•
Only qualified personnel may commission
and operate these devices. These are
personnel who are authorized to
commission, ground and tag devices,
systems and circuits according to the
current state of safety technology.
•
It is not permissible to make any electrical
changes to the encoder.
•
Route the connecting cable to the
angular encoder at a considerable
distance or completely separated from
power cables with their associated noise.
Completely shielded cables must be used
for reliable data transfer and good
grounding must be provided.
•
Cabling, establishing and interrupting
electrical connections may only be
carried-out when the equipment is in a
no-voltage
condition. Short-circuits,
voltage spikes etc. can result in erroneous
functions and uncontrolled statuses which
can even include severe personnel injury
and material damage.
•
Before powering-up the system, check all
of
the electrical connections.
Connections, which are not correct, can
cause the system to function incorrectly.
Fault connections can result in severe
personnel injury and material damage.