6
IP 9519-1 EN
Installation
9. Insert the terminal board at the side un-
derneath the dial plate.
Use Phillips screwdriver to tighten the
retaining screw.
10. Insert the connecting cable into the guid-
ing of the indicating unit.
Fig. 8:
Inserting the terminal board
11. Guide the measuring signal lines (min.
8 mm stripped length) through the cable
gland and connect them to the spring-
cage terminal (31, 32) on the terminal
board (see Fig. 9). Observe the correct
polarity.
Measuring signal connection
The option module with current output is de-
signed as a two-wire system.
~
31+
32–
31+
32–
Fig. 9:
Measuring signal connection in two-
wire system
The option module consists of an actively
controlled current loop with a 4 to 20 mA
loop current. This current depends on the
position of the pointer on the Media 5
device:
−
Pointer position 0 to 270° corresponds
with the 4 to 20 mA loop current.
The measuring signal and supply voltage of
the option module are transmitted by the
same pair of wires. It is connected to the ter-
minal board over two spring-cage terminals.
Fig. 10:
Connecting the measuring signal lines
on the terminal board
The Media 5 Differential Pressure and Flow
Meter supplies a 4 to 20 mA current regard-
less of the supply voltage.
Risk of the supply voltage falling lower
than the required level due to the use of a
shunt.
Î
To maintain the functioning of the option
module when a shunt is used, apply the
following formula to take the loop volt
-
age into account: U
Loop-min
= 12 V +
(R
shunt
x 21 mA)
NOTICE
!
