Standard Application With Hart Functionality - ABB Endura ACA592 Operating Instructions Manual

Endura ACA592
4-electrode conductivity transmitter

4.6.2 Standard Application with HART Functionality

Adding resistance R
250
 U
U + 0.022A x (R
Smin Mmin
Where:
U – Minimum operating voltage of transmitter
Mmin
(refer to technical data for transmitter)
U – Minimum supply voltage of power supply/SPS input
Smin
(refer to technical data for transmitter)
R – Line resistance between transmitter and power supply
Ltg
R – Resistance for HART functionality
250
*Required
Fig. 4.7 Standard Application with HART Functionality
OI/ACA592/EC–EN Rev. B
increases the minimum supply voltage:
+ R )
Ltg 250
Transmitter
+
U
–
R250*
Mmin
R
Ltg
4 Electrical Installation
Control Room
+
U
Smin
–
Power Supply /
SPS Input with Supply
33