Flexim FLUXUS G704, User Manual, Page: 72 / 257

72 UMG70XV3-4EN 12.01.2009
7 Installation of FLUXUS G709
7.7 Connection of the Serial Interface
The RS232 interface is on the front plate of the flowmeter (see Fig. 4.4).
The flowmeter can be equipped with an RS485 interface (option). It will be connected as
follows:
Fig. 7.11: Connection of the serial interface
Table 7.11: Technical data of the active current input
current input
active passive
measuring range 0...20 mA -20...+20 mA
accuracy 0.1 % of reading

10 µA 0.1 % of reading

10 µA
input impedance 50

/0.6 W 50

/0.6 W
short circuit current 100 mA 100 mA
Table 7.12: Terminal assignment
terminal connection
43 RS485 (shield)
4A+ RS485 A+
4B- RS485 B-
T 1 A
T 1 B
P
T1
00
T 4 B
T 4 A
P
T1
00
B : A :
S A 3
S A 1
S A 2
S A 4
S B 3
S B 1
S B 2
S B 4
A V S
A V
A R S
A G N
A R
B V S
B V
B R S
B G N
B R
A C
2 3 0 V
1 0 0 . . .
D C
V O L T
L O W
4 A +
4 B -
4 2
4 3
4 1
L +
L -
N
L 1
P E
P 4 +
P 5 +
P 2 +
P 3 +
P 1 +
P 6 a
P 7 a
P 7 +
P 5 a
P 6 +
P 4 -
P 5 -
P 2 -
P 3 -
P 1 -
P 6 b
P 7 b
P 7 -
P 5 b
P 6 -
T 2 A
T 2 B
T 1 B
S 1
T 1 A
T 4 A
T 4 B
T 3 B
S 3
T 3 A
T 2 a
T 2 b
T 1 b
S 2
T 1 a
T 4 a
T 4 b
T 3 b
S 4
T 3 a
KL1 KL3 KL5 KL7
KL2 KL4
KL6 KL8
serial interface
RS485 (option)
(KL4)