Electrical Interconnection With Standard Application; Ma Functionality - ABB TTF300 Series Commissioning Instructions

4.5

Electrical interconnection with standard application

s
4.5.1

4 ... 20 mA functionality

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