Operation Of The Electronics - Siemens SITRANS DA400 Operating Instructions Manual

3.4.3

Operation of the electronics

Block diagram
L+
L-
DO
Sensor Sensor
In
By using a bridge rectifier, the current from a suitable external feed splitter creates the
internal current voltage of 3.3 V and 8.2 V for circuit 2. The supplementary voltage U
obtained from the PROFIBUS-PA signal of an external coupler. Circuits 1 and 2 have split
SITRANS DA400 with protection against explosion
Operating Instructions, 02/2006, A5E00684661-01
Current (any polarity)
Current (any polarity)
Digital output
Input
I+ Analog current input +
⊥ Mass
DI Digital input
A PROFIBUS PA (any polarity)
B PROFIBUS PA (any polarity)
Description
3.4 How It works
is
H
3-5