ABB ACQ550-x1-06A6-2 - Connection Examples of Two-Wire and Three-Wire Sensors

ACQ550-U1 User’s Manual 65
Application macros
Connection examples of two-wire and three-wire sensors
Many applications use process PI(D) and need a feedback signal from the process.
The feedback signal is typically connected to analog input 2 (AI2).
The macro wiring diagrams for each macro earlier in this chapter use an externally
powered sensor (connections not shown). The figures below give examples of
connections using a two-wire or three-wire sensor/transmitter supplied by the drive
auxiliary voltage output.
X1 / control board
5 AI2 Process actual value measurement,
0(4) … 20 mA, R
in
= 100 ohm
6AGND
…
X1 / control board
10 +24 V Auxiliary voltage output, non-isolated,
24 V DC, 250 mA
11 GND
P
I
4…20 mA
X1 / control board
5 AI2 Process actual value measurement,
0(4) … 20 mA, R
in
= 100 ohm
6AGND
…
X1 / control board
10 +24 V Auxiliary voltage output, non-isolated,
24 V DC, 250 mA
11 GND
P
0(4)…20 mA
I
Two-wire sensor/transmitter
Three-wire sensor/transmitter
OUT
–
+
–
+
Note: The sensor is supplied through its current output and the drive feeds the supply voltage (+24 V).
Thus the output signal must be 4…20 mA, not 0…20 mA