Connector / Terminal
Pin
Assignment / Signal
X2 / 2.3
8
AI523 / I3+
X2 / 2.2
9
AI523 / I2+
X2 / 1.4
10
AI523 / I4- (AGND1)
X2 / 2.5
11
AI523 / I5+
X2 / 2.4
12
AI523 / I4+
Table 50: Pin assignment AI (X3)
Connector / Terminal
Pin
Assignment / Signal
X3 / 1.6
13
AI523 / I6- (AGND1)
X3 / 2.7
14
AI523 / I7+
X3 / 2.6
15
AI523 / I6+
X3 / NC
16
Not connected
X3 / NC
17
Not connected
In module AI523, the signals I0-, I2-, I4- and I6- are internally connected to an analog earth. The
potential difference of the analog earth to M is ±1 V (max.). The replacement device has no cur-
rent sources on pins 16 and 17. If necessary, these current sources can be connected to indi-
vidual measurement channels via the configuration (DIP switch).
Table 51: Pin assignment 24 V DC 6W (X4)
Connector / Terminal
Pin
Assignment / Signal
X4 / L+
18
L+
X4 / L+
19
L+
X4 / M
20
M
X4 / M
21
M
X4 / FE
22
FE
Table 52: Pin assignment AI (X5)
Connector / Terminal
Pin
Assignment / Signal
X5 / 3.0
23
AI523 / I8- (AGND2)
X5 / 4.1
24
AI523 / I9+
X5 / 4.0
25
AI523 / I8+
X5 / 3.2
26
AI523 / I10- (AGND2)
X5 / 4.3
27
AI523 / I11+
Table 53: Pin assignment AI (X6)
Connector / Terminal
Pin
Assignment / Signal
X6 / 4.2
28
AI523 / I10+
X6 / 3.4
29
AI523 / I12- (AGND2)
X6 / 4.5
30
AI523 / I13+
X6 / 4.4
31
AI523 / I12+
X6 / 3.6
32
AI523 / I14- (AGND2)
AC31 Adapters
Replacement devices: I/O modules > Replacement device 07AI91-AD
2018/09/24
3ADR010122, 8, en_US
92
