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Device Specifications
I/O Modules > Analog I/O Modules
I0+
2.0
I0–
1.0
I1+
2.1
I1–
1.1
I2+
2.2
I2–
1.2
I3+
2.3
I3–
1.3
4.0
3.0
4.1
3.1
4.2
3.2
4.3
3.3
Attention:
By installing equipotential
bonding conductors between
the different parts of the
system, it must be made sure
that the potential difference
between ZP and AGND never
can exceed 1 V.
Fig. 69: Terminal assignment
Connection of Resistance Thermometers in 2-wire Configuration
When resistance thermometers (Pt100, Pt1000, Ni1000) are used, a constant current must flow
through them to build the necessary voltage drop for the evaluation. For this, the I/O module
provides a constant current source which is multiplexed over the 8 analog channels.
Fig. 70: Connection example
548
4 analog inputs
for 0...10 V,
–10 V...+10 V,
0/4... 20 mA,
Pt100 / Pt1000,
Ni1000 and
digital signals
AGND
O0+
O0–
4 analog
O1+
outputs for
O1–
–10 V...+10 V,
O2+
0/4... 20 mA
O2–
O3+
O3–
AGND
PTC
1.8
2.8
1.9
2.9
Pt100
Pt1000
Ni1000
UP
ZP
3ADR010121, 13, en_US
I4+
2.4
I4–
1.4
I5+
2.5
I5–
1.5
I6+
2.6
I6–
1.6
I7+
2.7
I7–
1.7
4.4
3.4
4.5
3.5
4.6
3.6
4.7
3.7
These I/Os only with AX522
PTC
Attention:
The process voltage must be
included in the earthing concept
3.8
4.8
of the control system
UP
+24 V
(e.g. earthing the minus pole).
ZP
0 V
3.9
4.9
1.0
I0-
1.1
I1-
PTC
1.8
UP
1.9
ZP
4 analog inputs
for 0...10 V,
–10 V...+10 V,
0/4... 20 mA,
Pt100 / Pt1000,
Ni1000 and
digital signals
O4+
O4–
4 analog
O5+
outputs for
O5–
–10 V...+10 V
O6+
O6–
O7+
O7–
2.0
I0+
2.1
I1+
2.8
UP
2.9
ZP
2019/04/17
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