ABB AC500 PLC - Connection of Active-type Analog Sensors (Current) with Electrically Isolated Power Supply and Series-Connection of an Additional Input

Figure:
The following measuring ranges can be configured Ä Chapter 1.5.2.2.2.6 “Parameterization”
on page 489:
Current -20 mA...20 mA 1 channel used
Current 0 mA...20 mA 1 channel used
Current 4 mA...20 mA 1 channel used
The function of the LEDs is described under Diagnosis and displays / displays Ä Chapter
1.5.2.2.2.7 “Diagnosis” on page 493.
Unused input channels can be left open, because they are of low resistance.
Connection of Active-type Analog Sensors (Current) with Electrically Isolated Power Supply and Series-
Connection of an Additional Input
ZP
1.0
I0-
1.1
I0B
1.8
UP
1.9
ZP
PTC
2.0
I0+
2.1
I0A
2.8
UP
2.9
ZP
-20 ... +20 mA
0 ... +20 mA
+4 ... +20 mA
+
-
UP
+
-
1
Fig. 47: Connection example
1 Analog input of the second device
If series-connection of an additional input is used, the input resistance of the
module (ca. 330 Ω) must be added to the input resistance of the second device.
Make sure that the maximum permitted load resistance of the analog sensor is
not exceeded (see the data sheet of the analog sensor).
The input of the module is not related to ZP. If the input of the second device is
related to ZP, the order of sequence in the series-connection must be observed
by all means (from the sensor to the module and then to the input of the second
device).
The following measuring ranges can be configured Ä Chapter 1.5.2.2.2.6 “Parameterization”
on page 489:
Current -20 mA...20 mA 1 channel used
Current 0 mA...20 mA 1 channel used
Current 4 mA...20 mA 1 channel used
Device Specifications
I/O Modules > Analog I/O Modules
2019/04/17 3ADR010121, 13, en_US 479