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BTL7-A/C/E5 _ _ -M _ _ _ _ -SF-F _ _
Magnetostrictive Linear Position Sensor – Rod Style
No. 935790 EN · L18; Subject to modification. Replaces L17.
english
Shielding and cable routing
Defined ground!
The BTL and the control cabinet must be at the
same ground potential.
Shielding
To ensure electromagnetic compatibility (EMC), observe
the following:
– Connect BTL and controller using a shielded cable.
Shielding: Braided copper shield with minimum 85%
coverage.
– On the BTL side the cable shielding is connected to
the housing. Ground the cable shielding on the
controller side (connect with the protective earth
conductor).
Magnetic fields
The position measuring system is a magnetostrictive
system. Ensure that there is sufficient distance between
the BTL and the transducer/holding cylinder and strong,
external magnetic fields.
Cable routing
Do not route the cable between the BTL, controller, and
power supply near high voltage cables (inductive stray
noise is possible). The cable must be routed tension-free.
Cable length
BTL7-A…
≤ 30 m
1)
BTL7-C/E…
≤ 100 m
1)
1) Prerequisite: Construction, shielding and routing preclude the effect of
any external noise fields.
Bending radius for fixed cable
The bending radius for a fixed cable must be at least five
times the cable diameter.
Starting up the system
1.
Check connections for tightness and correct polarity.
Replace damaged connections.
2.
Turn on the system.
3.
Check measured values (especially after replacing the
BTL). Recalibrate the BTL, if necessary.
DANGER
Uncontrolled system movement
When starting up, if the position measuring system is part
of a closed loop system whose parameters have not yet
been set, the system may perform uncontrolled
movements. This could result in personal injury and
equipment damage.
►
Persons must keep away from the system’s
hazardous zones.
►
Startup must be performed only by trained technical
personnel.
►
Observe the safety instructions of the equipment or
system manufacturer.
Operating notes
– Regularly check function of the BTL and all associated
components.
– Take the BTL out of operation whenever there is a
malfunction.
– Secure the system against unauthorized use.
– Observe the directives of the FDA and 3-A SSI, Inc. for
monitoring hygiene and cleaning of the device, as well
as the instructions for operation and maintenance of
the entire system. This especially applies to the
selection of gasket materials, which must be FDA and
3A SSI-conformant, as well as temperature-resistant
and chemically resistant for the cleaning methods
applied and the cleaning and process media used.
– Regularly check the entire device for damage and signs
of wear.
– Regularly check the rod for cracks (e.g. with a color
penetration test) and exchange it if damaged. This
especially applies if the sensor is subjected to heavy
product movements or other mechanical influences.
– Cleaning in place (CIP
1)
) is possible.
– As part of a cleaning validation, the cotter pin and the
float must be removed and checked. Check the holes
in the float and all surfaces that come into contact with
the product for cleanliness and clean them, if
necessary. This also applies to the area near the
welded port. If cleanliness is not achieved, the cleaning
method must be adjusted.
1) Clean in Place
Electrical connection
Output signals
1) Unassigned leads that are not used
can be connected to the GND on the
controller side but not to the shield.
2) Because of the separate output
drivers there are small voltage
differences between PK and GN
(offset < 10 mV).
3) Reference potential for supply voltage
and EMC-GND!
Wire color
-A510
-C500
-C570
-E500
-E570
YE
Yellow
Not used
1)
0…20 mA
20…0 mA
4…20 mA
20…4 mA
GY Gray
0 V
PK
Pink
10…0 V
2)
–
RD Red
La (programming input)
GN Green
0…10 V
2)
–
BU Blue
GND
3)
BN Brown
10…30 V
WH White
Lb (programming input)
