Application Note

1606-XL 480EPT
• World-wide approvals ( ) • 90% efficiency
for industry • Ideal for parallel operation
• Input: AC 115/230V auto select • Remote shut-down
• Output: 24...28V / 480W (600W)
Input Output (signal terminals see)
Output voltage DC 24...28V, adjustable by (covered) front panel po-
Input voltage AC 100...120V/200...240V, tentiometer. Adjust. range guaranteed.
47...63Hz, auto select Output noise Radiated EMI values below EN50081-1, even when
Rated tolerances suppression using long, unscreened output cables.
• Continuous AC 85...132V resp. AC 184...264V Ambient temperature range Operation: 0°C...+70°C (>60°C: Derating)
operation Tamb Storage: -25°C...+85°C
• Short-term (1 min) AC 85...140V resp. AC 170...280V Rated continuous loading with convection cooling:
at 24V/20A • Tamb=0°C...60°C 24V/20A resp. 28V/18A
short-term (<30s) 24V/25A resp. 28V/22A
Input current <10A (115V range)
<5A (230V range) Derating 12W/K (at Tamb = 60...70°C)
Voltage regulation better than 2% over all
Inrush current typ. <18A @ AC 264V and cold start
Ripple (incl. spikes (20MHz bandwidth), 50Ω measurement
Fuse loading <5A2s (cold start) • Output charact. S <20mVPP (<0.1%)
• Output charact. P <40mVPP (In: AC 230V, Out: 24V/20A)
If you intend to protect the primary side of the power supply with a fuse or a circuit
(S/P: Single/Parallel Mode) <100mVPP (In: AC 184V, Out: 24V/20A)
breaker, a 15 A slow acting fuse (HBC) or a supplementary protector 1492-
SPU1C150 is recommended (1492-SP1C160 for Europe). In order to meet local re- Over-voltage protection At 33V ± 10%: switch to hiccup mode
quirements, please consult local codes and regulations for proper installation. Front panel indicators:
• Green LED on, when Vout > UT, where UT is appr. 2V below Vout
EN 61000-3-2 (harmonic current emissions [PFC]) is fulfilled
adjusted (24V...28V)
Transient Transient resistance acc. to VDE 0160 / W2 • Red LED on, when Vout < UT
handling (750V/1.3ms), for all load conditions. Parallel operation Yes, up to ten units
Hold-up time 30ms at 24V/20A, AC 230Vin To achieve current sharing the output V/I characteristic can be altered to be 'softer'
30ms at 24V/20A, AC 120Vin (25V at 0.4A, 24V at 20A). This is done by repositioning an external bridge connec-
15ms at 24V/20A, AC 100Vin tion (without opening the unit).
Power Back Immunity max. 30V

Efficiency, Reliability Construction / Mechanics

Housing dimensions and Weight
Efficiency typ. 90.5% (AC 230V, 24V/20A) • WxHxD 220mm x 124mm x 102mm (+ DIN rail)
Losses typ. 50W (AC 230V, 24V/20A) • Free space for above/below 70mm recommended
ventilation left/right 25mm recommended
MTBF 519.000h acc. to Siemensnorm SN29500 • Weight 2,5kg
(24V/20A, 230V, Tamb = 40°C)
Design advantages: All connection blocks are easy to reach as mounted on the
Life cycle (electrolytics) The unit exclusively uses longlife electrolytics, speci- front panel; PVC insulated cable can be used for all connections, as the connection
fied for +105°C. High reliability, as blocks are mounted in the cooler area on the underside of the unit.
• only five aluminium electrolytics and
• no small aluminium electrolytics are used. Wire Size Input/Output:
Stranded 20...10 AWG (0.5...4 mm²), Solid 20...10 AWG (0.5...6 mm²)
Tightening Torque: 7 lbs in (0.8 Nm) recommended

1 Publication 1606-AP018A-EN-E March 2003

 2 Application Note

Start / Overload Behavior • Unit turns on, when positive voltage (3...30V, 0.3...2mA) is applied to 'Remote
Startup delay typ. 0.55s Shutdown 1' against the minus output
• Unit switches off at <0.6V
Rise time appr. 20...80ms, depending on load • Input voltages of 0.6...3V and negative voltages are not defined
Overload behavior Overload Design (see diagram) Parallel operation / cascading of outputs:
Advantages: • Use a multi-pole switch with one switch contact for each power supply unit (1 x
• No disconnection/hiccup, thus overloading is possible also for a longer period of On); connection of the signal terminals with one switch contact is not permissible
time (load start-up), ideal for parallel operation. when being used in parallel operation
• High overload/short-circuit current due to straight characteristic; each bias point of Additional control features with parallel operation:
the V/I characteristic extends 20A. Unit turns on:
Advantage: Due to the high and continuously supplied overload current the unit starts • positive voltage (4...30V) is applied to 'Remote Shutdown 1' against negative output
reliably even with awkward loads (DC-DC converters, motors). No 'sticking' can occur, voltage
for example, with fold-back characteristics, and secondary fuses trigger more reliably. Unit switches off:
Signal terminals • 0...0.5Vin is applied to 'Remote Shutdown 1'
Note:
The remote On/off control is activated via the signal terminals 'Remote Shutdown 1 and
• Connection of the terminals 'Remote Shutdown 1' is possible with parallel opera-
2'. The unit is delivered with the signal terminals jumpered (control state is 'On' with the
tion; do not use the terminals 'Remote Shutdown 2'
terminals jumpered).
• Only connect the signalling lines at one single point of the negative output voltage;
a) Remote shut-down by switch: a voltage drop between the connection point and the minus terminals must not ex-
Unit turns on when the signal terminals 'Remote Shutdown 1 and 2' are closed by a ceed 0.5V, even at maximum load.
switch (R<10Ω). Additional data regarding remote shut-down:
• Connect the switch contact with the signal terminals Remote Shutdown 1 and 2, on-
• Output current < 5mA (mean)
ly. Ensure the switch contact is not connected to the output voltage or in contact with
• Power consumption <2.5W
any separate voltages.
• Residual voltage at zero load <3V
• Unit is in standby mode with open switch contact (R>100kΩ)
• Startup delay <500ms
b) Remote shut-down by control voltage: • Switching operations per min. <10
Positive voltage is applied to 'Remote Shutdown 1' against minus output (ref. potential)

Output characteristic (typ.) Efficiency (typ., at Vout =24V) Hold-up time (min., at Vout =24V)

32 60
92
50 60% load
Hold-up time [ms]

28 100% load
91 40 125% load
24
Output voltage Vout [V]

30
Efficiency [%]

20 90 20
16 10 at AC 230V
28V / Parallel 89 0
12 24V / Parallel
24V / Single 100 VAC 180 190 200 210 220 230 240
8 88 Input voltage VACin [V]
28V / Single 120 VAC
230 VAC
4
100
87
Hold-up time [ms]

0 80 60% load
5 10 15 20 25
0 5 10 15 20 25 30 100% load
Output current Iout [A] Output current Iout [A] 60 125% load
40
20
at AC 115V
0
85 90 95 100 105 110 115 120 125 130
Input voltage VACin [V]

Specifications valid for 230 V AC input voltage, +25°C ambient temperature, and 5 min
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run-in time, unless otherwise stated. They are subject to change without prior notice
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Publication 1606-AP018A-EN-E March 2003  2003 Rockwell International. All Rights Reserved. Printed in US