Phoenix Contact 2861205, User Manual

Page: 32 / 88

IB IL 24 MUX MA-PAC
32
PHOENIX CONTACT 5981_en_06
Option 2 The field multiplexer supply U
MUX
and the I/O supply U
M
/U
S
are provided from a power
supply unit:
Figure 4-4 Electrical isolation in the field multiplexer (one voltage supply)
Potential areas:
1 Area of remote bus cable
2 Area of functional earth ground (FE) capacitive for shield
3 Area of functional earth ground (FE)
4 Area of the field multiplexer supply U
MUX
from which the communications
power U
L
and analog terminal supply U
ANA
are generated not isolated
from the I/O voltages U
M
and U
S
5981B016
+24 V (U )
M
+24 V (U )
S
Local bus
Remote bus
U
ANA
U
L+
U (GND )
L- MUX
1
2
5 V
24 V
m
C
24 V
7.5 V
24 V
5 V
4
4
1
2
3
Power supply
U
(U / U )
MUX
L ANA
/ U / U
M S