2866336【PDF 8/8 页】PWR SUPPLY 100W 100-240AC 24VDC

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Power Supply Unit, Primary Switched, Narrow Design – MINI-PS-100-240AC/24DC/C2LPS

7.2. Temperature Response

The device can supply a nominal output current of

3.8 A up to an ambient temperature of 60°C (140°F).

At ambient temperatures above +60°C (+140°F), the

output power must be reduced by 2.5% per Kelvin

temperature rise. At ambient temperatures above

+70°C (+158°F) or in the event of a thermal overload,

the device reduces the output power to protect itself

and returns to normal operation once it has cooled

down.

3.8

0

U OUT = 22.5 -26 V

7.3. Parallel Operation

0

20

40

60

Devices of the same type can be connected in

parallel to increase both redundancy and power. The

default setting does not have to be adjusted.

If the output voltage is adjusted, an even current

distribution can be ensured by precisely setting all

power supply units that are operated in parallel to the

same output voltage.

To ensure symmetrical current distribution we

Ambient temperature [°C]

Figure 12

recommend that all cable connections from the power

MINI

MINI

supply unit to the DIN rail are the same length and have

24 V/3.8 A +

–

24 V/3.8 A +

–

the same cross section.

Depending on the system, for parallel connection of

more than two power supply units a protective circuit

should be installed at each individual device output

(e.g., decoupling diode or DC fuse). This prevents high

+

–

return currents in the event of a secondary device fault.

7.4. Redundancy Operation

Redundant connections are designed for supplying

systems, which place particularly high requirements on

operational safety. If a fault occurs in the primary circuit

of the ? rst power supply unit, the second device

automatically takes over the complete power supply

without interruption, and vice versa.

Σ = 3.8 A

+ –

Figure 13

For this purpose, the power supply units to be

connected in parallel must be large enough that the

total current requirements of all loads can be fully met

MINI

24 V/3.8 A +

–

MINI

24 V/3.8 A +

–

by one power supply unit. External decoupling diodes

are required for 100% redundancy.

+

–

7.5. Increasing Power

The output current can be increased to n x I N where

n is the number of devices connected in parallel.

Parallel connection for increasing power is used

when extending existing systems. A parallel

connection is recommended if the power supply unit

does not cover the current consumption of the most

powerful load. Otherwise, the loads should be divided

over independent individual devices.

A maximum of ? ve devices can be connected in

parallel.

PHOENIX CONTACT page 8 of 8

Σ = 7.6 A

+ –

Figure 14

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