Phoenix Contact IB IL AO 4/U/0-10-ECO Handleiding (190 Pagina's)

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12.3 Recommendation for supplying the supply voltage

and resetting the voltage with regard to Inline

12.3.1 Supply at the bus head

In the Inline terminals, electrical isolation is implemented between the logic and I/O de-

vices. To prevent decreasing the electrical isolation, the voltages for supplying the logic

and for supplying the I/O devices must be provided separately using two separate power

supply units.

Figure 12-5 Schematic example for supplying the supply voltage at the bus coupler

(BK) using two separate power supply units

Depending on the device that forms the head of the Inline station, the voltage which is

used to generate the U

L

communications power and the U

ANA

voltage for the analog ter-

minals has different designations.

Table 12-2 Designation for the voltages

Device Designation of the voltage which is used to generate U

L

and

U

ANA

Bus coupler U

BK

Inline controller U

ILC

Field multiplexer U

MUX

Other U

24V

BK

U

(U , U)

BK

L ANA

U/U

MS

24 V DC

24 V

0 V

24 V DC

24 V

0 V

U + (7,5 V)

L

U + (24 V)

ANA

U/U -

L ANA

U (24 V)

S

U (24 V)

M

GND

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