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3 Design and principle of oper-
ation
The Type 4749 Position Transmitter converts
the linear or rotary motion of a control valve
into an electric 4 to 20 mA standardized
signal.
The angle of the position transmitter's axis is
measured by the magnetoresistive measuring
system and converted into an electric signal.
3.1 Device overview and operating controls
2
3
1
Enclosure cover
2
Stop screw
3
Grounding connection (external)
4
key
5
key
6
Red LED
7
Green LED
8
Terminal
9
Grounding connection (internal)
10 Shaft locking
Fig. 3-1: Operating controls
EB 4749 EN
Design and principle of operation
Two pushbuttons are used to operate the
device and make device settings. Two LEDs
(red and green) indicate the menu items and
settings.
To operate the position transmitter, a
transmitter supply voltage of U
is required for the 4 to 20 mA measuring
circuit.
1
4
6
= 12 to 36 V
B
5
8
7
9
10
3-1
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