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PSU-24
Instrument Power Supply
This instrument power supply is designed di erent-
ly from a general purpose power supply. Emphasis
is placed on withstanding and rejecting EMI events,
such as transients associated with close by unsnub-
bered contactors etc.
This is achieved by:
› Second and third stage filtering in both common and
normal mode configurations
› Constructing the transformer with inherent shielding
to reject unwanted signals
This combination of techniques eliminates the need for
a Y cap between the primary and secondary, increasing
the impedance to high frequency transients by an order of
magnitude or more.
› Powers up to 10x 4-20mA 2-wire loops
› Overload protection
› Low noise
› High accuracy (2%)
› Compact DIN rail mounting unit
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Speci cations
Input voltage supply 85–265V AC/DC
Output voltage 24V DC
Output current 200mA max
Output ripple 4mV rms/25mVpp max
Load regulation < 0.1%
Line regulation < 0.1%
Short circuit tolerance Inde nite
EMC compliance Emission: EN55022-A. Immunity: EN50082-
1. Safety: EN60950.
Mains isolation 250V AC
Isolation test voltages Mains to output: 3000V AC, 50Hz.
Mains to earth: 1500V AC, 50Hz.
Ambient dri ≤ ±0.01%/°C FSO typical
RF immunity < 1% e ect FSO typical
Operating temperature 0 to 60°C (32–140°C)
Storage temperature -20 to 80°C (-4 to 176°F)
Operating humidity 5–85% RH max
Casing (H x W x D) 79 x 30 x 70mm (3.11 x 1.18 x 2.76")
Mounting 35mm DIN rail mount
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Wiring
KEY
13 14
10
9
3750V ISOLATION BARRIER
N/C N/C
N/C N/C
LED
+24V DC
1
+24V DC
2
AC/DC PWR
3
AC/DC PWR
4
− (NEG)
5
− (NEG)
6
EARTH
7
EARTH
8
9
10
13
14
+24V DC
+24V DC
− (NEG)
− (NEG)
5
1
6
2
7
3
8
4
LED Indicator
LED On Output exceeds 18V
LED O No output
POWER
85~265V
AC/DC
43
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United States (Dallas, TX)
(214) 926 4950
www.de neinstruments.com
New Zealand (Head O ce)
+64 (9) 835-1550
www.de neinstruments.co.nz
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South Africa (Johannesburg)
087 945 2700
www.de neinstruments.co.za
PSU-24 -MAN-15V05 (1005)Copyright © De ne Instruments
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