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Power Supply Unit, Primary Switched, Narrow Design – MINI-PS-100-240AC/24DC/C2LPS
6.4. Output ( 2 , Figure 9)
The power supply unit meets the requirements of
NEC Class 2. The 24 V DC connection is made using
the "+" and "-" screw connections on the screw
connection 2 . The output voltage set upon delivery is
24 V DC.
The output voltage can be adjusted from 22.5 to
26 V DC on the potentiometer 4 .
Protecting the Secondary Side:
The device is electronically short-circuit-proof and
idling-proof. In the event of an error, the output voltage
Output 24V DC
+ – –
is limited to a maximum of 35 V DC.
It should be ensured that all output cables are the
correct size for the maximum output current or have
separate fuse protection.
The cable cross sections in the secondary circuit
should be large enough to keep the voltage drops on
the cables as low as possible.
Active Signal Output ( 3 , Figure 10)
The 24 V DC signal is between the "DC OK" and "-"
connection terminal blocks and can be loaded with
20 mA maximum. This signal output indicates that the
output voltage has fallen below 21.5 V DC when "active
high" changes to "low".
The DC OK signal is isolated from the power output.
This ensures that a separate supply does not enter
from devices connected in parallel.
The 24 V DC signal can be connected directly to a
logic input for evaluation.
DC OK LED
The green DC OK LED enables local function
evaluation in the control cabinet.
24 V DC
20 mA
U OUT
[ V ]
U N
22.5 - 26
DC OK
U OUT = 22.5 - 26 V
100 W,
maximum
Figure 10
Green
Status 1
ON
Status 2
OFF
3.8
I N
5
I OUT
[ A ]
"DC OK" LED 5
Active DC OK
U = +24 V
U=0V
switching output 3 (with reference to "-")
(with reference to "-")
Meaning
Normal operation of
the power supply unit
U OUT > 21.5 V
U OUT ≤ 21.5 V DC
? Secondary load
short circuit
or overload
? No mains voltage
or device fault
Figure 11
Connected fuses are reliably tripped. The selectivity
in your system con ? guration is ensured at all times.
7. Installation
7.1. Output Characteristic Curve
The device can supply a nominal output current of
3.8 A up to an ambient temperature of 60°C (140°F).
In the event of heavier loads the working point
demonstrates the U/I characteristic curve shown in
Figure 11.
On an overload or short circuit, the entire output
current I BOOST is provided permanently at a reduced
output voltage.
Once the overload or short circuit has been removed,
the entire set secondary voltage is available again.
The U/I characteristic curve ensures that both heavy
capacitive loads and devices with DC/DC converters
can be supplied by MINI POWER in the input circuit
without any problems.
PHOENIX CONTACT page 7 of 8
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