IB IL AI 4/EF ...
7252_en_02 PHOENIX CONTACT 10
7 Electrical Isolation
Figure 3 Electrical isolation of the individual function
areas
8 Connection Notes
9 Connection Examples
Figure 4 Connection of active sensors
in 4-wire technology with shield connection
Always connect the analog sensors using
shielded, twisted pair cables.
Connect the shielding to the terminal using the
shield connection clamp. The clamp connects
the shield to FE on the module side. Avoid
connection to FE from both sides.
Analog inputs
FE potential
Electrical isolation
between area A
and B
U (24 V DC)
ANA
Local bus (IN)
Peripheral
interface
OPC and
microprocessor
bus interface
Local bus(OUT)
U (7.5 V DC)
L
U (24 V DC)
ANA
U (7.5 V DC)
L
24 V
5V
15 V
A
B
72520003
24 V
24 V
U (24 V DC)
M
U (24 V DC)
is
U (24 V DC)
M
Use a connector with shield connection when
installing the sensors. Figure 4 shows the
connection schematically (without shield
connection).
12
1
2
3
4
1
2
3
4
12
1
2
3
4
1
2
3
4
12
1
2
3
4
1
2
3
4
12
1
2
3
4
1
2
3
4
D
AI 4/EF
1
2
3
4
Voltage sensor
at channel 1
72520004
Slot
Channel
Current sensor
at channel 4
+24V
U1+
U1-
+24V
I1-
I1+
TR
Uis
12
3
4
