Electronic Position Transmitter "Esr; Functional Principle Of The Electronic Position Transmitter; Electronic Position Transmitter Specifications - Baelz Automatic 373-E66 Series Operating Instructions Manual

Operating Instructions

8. ELECTRONIC POSITION TRANSMITTER "ESR"

This actuator can also be equipped with an electronic position
transmitter. It is installed in the linear actuator as an additional
module in combination with a special switching and signal-
ling unit [114]. The electronic non-contact position transmitter
converts a rotary motion into an output signal. This output
signal is a DC current of 4 ... 20 mA for two-wire connection. A
special switching and signalling unit converts the axial motion
of the actuator connecting rod into a rotary motion. It features
a crown wheel which engages in the outer gear wheel of the
electronic position transmitter.
.
The electronic position transmitter is protected against re-
verse polarity.
It is designed for direct electrical connection via
two- wire connection with an output current of 4 ... 20 mA.

8.1 Functional principle of the electronic position transmitter

The rotary motion generated by the switching and signalling unit is transmitted by the gear wheel to a rotor inside
the electronic position transmitter. The rotor position is measured with a capacitive pick-up system.
Ten stator segments (see figure 24) are excited using successive pulses (2). The phase relationship of the signal
– capacitively decoupled from the rotor – depends on the rotation angle. The signal is amplified (4) and is
converted via the phase comparator (5) and the voltage/current converter (6) into an output current proportional
to the rotation angle.
1 Voltage stabilization
2 Pulse generator
3 Stator-rotor
4 Amplifier
5 Phase comparator

8.2 Electronic position transmitter specifications

Electrical connection
Auxiliary power UH
Max. load RB
Output current
Operating current
Technical specifications subject to change
W. Bälz & Sohn GmbH & Co.
Phone +49 (0)7131 15 00 0
6 U/I converter
7 Three-wire connection
8 Two-wire connection
9 Load
Two-wire connection
Koepffstrasse 5
Fax +49 (0)7131 15 00 21
Figure 23: Top view of cover with "ESR"
12-30V VDC
50 (UH-12) Ω
4-20 mA
max. 30mA
74076 Heilbronn
www.baelz.de
Page 27/37
BA 373-E66
Figure 24: ESR block diagram
Observe copyright protection DIN 34
Germany
mail@baelz.de