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Direction for Use (GB) / Gebrauchsanleitung (D)
Converter CON 011
Direction for use
1.4.2 Hints for fault finding
For quick fault finding we recommend the provisional connection of an identical sensor to the
converter. If the head of the sensor is moved to a metallic target, the output voltage of the
converter must change from approx. −20 V[−18 V] to −4V [−2V].
In case the converter input is open or short−circuit, the output voltage should amount to approx.
0.3V. The open converter input does not show any supply voltage or supply frequency.
Eddy current sensors consist of a low−impedance coil, i.e. with a resistance measurement it is
only possible to detect a break of the cable. A detection of short−circuits or defective coils is not
possible. The cable screen must be isolated from the converter housing, from the metal
protection tube and from the housing of the LEMO connector. One possible error source could
be a missing or uncorrect shrinkage tube at the adapter between sensor and connection cable
(at the protection tube cable in the protection sleeve).
1.4.3 Repair
Due to a compact design and the high reliability, it is not intended to repair the signal converters.
In case of defects, the signal converters must be replaced. In this case it is recommended to
return the sensor to the factory to get a precise adjustment for the measuring chain with the new
converter. If this should be not possible, all information stated on the type plate of the converter
together with the exact type of converter and sensor and the exact material designation of the
measuring target must be defined.
The typical exchange error with substitution of the sensor or converter including an internal
reference alignment at epro averages 1.5% − 2%. Epro assures a maximum exchange error of
5% related to the measuring range final value.
1.5 Technical Data
Only specifications with tolerances are guaranteed. Data without tolerances are not guaranteed
and are only for information purposes. If not stated otherwise, the specifications are valid for the
nominal supply voltage −24V.
1.5.1 Input
Connection for eddy current sensors self locking LEMO socket, impermeable to presswater
for connection of epro sensors PR 6422.... PR 6426.
1.5.2 Supply
Supply voltage range: −23 ... −32V for output voltage range −4..−20V
−21 ... −32V for output voltage range −2..−18V
−18 ... −21V with reduced output voltage range
Nominal supply current: < 15mA, with 10KΩ load resistance
Reverse connect protection Reverse connect protection of all 3 terminals
(common, output, − 24V)
Nominal operating frequency: approx. 1,25 MHz
De−adjustment of oscillator for
adjacent arrangement of sensors: open link J1 (delivery state: closed)
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