Electrical
connections
CI/TTF300-X1
TTF300
EN - 23
4.5
Electrical interconnection with standard application
s
4.5.1 4 ... 20 mA functionality
Panel
Control
room
A
B
+
-
U
M
+
U
S
-
R
Ltg
A00094
Fig. 13
A Transmitter
B Supply isolator / PCS input with supply
When connecting these components, observe the following condition:
U
Mmin
U
Smin
+ 0.022 A x R
Ltg
Where
U
Mmin
:
Minimum operating voltage of transmitter
U
Smin
:
Minimum supply voltage of supply isolator / PCS input
R
Ltg
:
Line resistance between transmitter and supply isolator