QUINT-PS/24DC/24DC/ 5/CO
105537_en_02
PHOENIX CONTACT
17 / 22
15.3
Active switching output “U
IN
>
19.2
V”
During normal operation of the DC/DC converter, the
U
IN
>
19.2
V output signal is between connection terminal
blocks "U
IN
>
19.2
V” and “-” and can carry a maximum of
20
mA. The U
IN
>
19.2
V signal output indicates a low input
voltage by switching from “active high” to “low”.
16
Derating
16.1
Temperature-dependent derating
With an ambient temperature of up to +40°C, the device
supplies the continuous output current of I
BOOST
. The
device can supply a nominal output current of I
N
with
ambient temperatures of up to +60°C. In the case of ambient
temperatures above +60°C, the output current must be
reduced by 2.5% per Kelvin increase in temperature. The
device does not switch off at ambient temperatures of +70°C
or thermal overload. The output capacity is reduced as far as
necessary to provide device protection. After it has cooled
down, the output capacity is increased again.
16.2
Voltage-dependent derating
The nominal input voltage of 24
V
DC is divided into the
areas of starting and operation. The DC/DC converter
requires at least 18
V
DC for cold starting, whereby the input
voltage can sink to 14
V
DC during operation. The device
only switches off under this limit. The upper voltage limit is
32
V
DC for both starting and operation.
18 ... 24 V DC
20 mA
U
>19,2V
IN
PLC D
igi
t
al
Input
+
-25
0
40
60
20
I
BOOST
I
N
Ambie
nt t
em
p
era
tu
re [°
C
]
Output
c
u
rre
nt
[A]
1
00
%
1
25
%
14
1
5
1
6
1
7
1
8
[
U
/V
]
IN
[I
/A
]
OU
T
U
=
2
4 V
O
U
T
U
=
26
V
O
U
T
U
=
28
V
O
U
T
-
25
℃ ... 4
0
℃
4
0
℃ ...
60
℃