180

System Power Supply

 Modular Watt Box
Multi-Output Power Supplies 250W/400W/600W/800W/1250W

Features

What is the trouble with multi-output power supply?

䢇Requires trial sample in a short period after the specification is fixed.

䢇Have to pay the cost of developing power supply and its initial-cost.
䢇Have trouble on the spending cost and the time for applying the safety standards.
䢇Have problem of CE marking for exporting to EU.
䢇Have to spend time more for designing one's own products or system without power supply.
䢇The standardization of power supply.

System Power Supply

Outputs: up to 14CH
Outputs: up to 6CH Outputs: up to 7CH Single Output
Total wattage: 800W
Total wattage: 250W Total wattage: 400W/600W Output wattage: 1250W
(Max. 1000W peak)

Considering OEM

Alpha series OEM power supply

1 sample delivering 2weeks 3 to 4 months
2 initial cost
Design cost no need
Application for safety standard no need
Tools and dais no need
3 safety standard application approved by UL/C-UL/SEMKO, need
compliance with CE-Marking
4 harmonics restrain installed PFHC EN61000-3-2 need to design the circuit
5 size already known before starting the design unknown until design finish
6 min. order qty. from 1 unit has to consider the ordering qty., delivery term, stock

181
 WORLD WIDE SPECIFICATION
1) input voltage range
universal input range from 85V to 265VAC world wide commercial input

2) Harmonics Current Control

Alpha has unique active filter for compliance with IEC1000-3-2/EN61000-3-2 harmonicslimitation.

3) Adapted the international safety standards

Listed UL1950, CSA950(C-UL), EN60950 (SEMCO),

4) Conformed with CE marking

Alpha is conformed with 'Low-Voltage Directive' of the CE-Marking and indicated.

5) EMI (Conducted EMI / Radiated RFI)

Alpha is met the EMI Standard EN55022 class A/VCCI Class A (CISPR pub.22).
Alpha will be met EN55022 class B and VCCI class B using Densei-Lambda Noise Filters.

6) EMS (immunity)
Adapted EN61000-4 series (IEC61000-4series)
EN61000-4-2 Level 4 : Electro-Static Discharge
EN61000-4-3 Level 3 : Radiated Electromagnetic Radio Frequency
EN61000-4-4 Level 4 : First Transient Barest
EN61000-4-5 Level 3 : Input surge Voltage
7) Alpha 400/600/800: 3 years warranty, Alpha 250S: 2 years warranty

Example of the conformation

[Alpha 250S]
System Power Supply

1)Alpha 250S available for 4 slots for the output

modules can be conformed the outputs.
Slot1&Slot2 use for main board only.
2)The total outputs wattage of the Alpha 250S is
maximum 250W.
3)Each specified output wattage of the output module
derating is depend on arrangement of position in the
slots, output voltage setting and ambient
temperature.
4)Internal input fuses
Alpha 250S: 250V8A
5) Harmonics Current Correction Circuit Switching
Frequency
Alpha 250S :100kHz (fixed : typ.)
6)Converter Switching Frequency
Alpha 250S :200kHz (fixed : typ.)

182
[Alpha 400/600]
1)Alpha 400/600 available for 5 slots for the output
modules can be conformed the outputs.

2)The total outputs wattage of the Alpha 400 is

maximum 400W.
3)The total outputs wattage of the Alpha 600 is
maximum 600W.
4)Each specified output wattage of the output module
derating is depend on arrangement of position in the
slots, output voltage setting and ambient
temperature.
5)Internal input fuses
Alpha 400: 250V10A
Alpha 600: 250V15A
6) Harmonics Current Correction Circuit Switching
Frequency
Alpha 400 :100kHz (fixed : typ.)
Alpha 600 :200kHz (fixed : typ.)
7)Converter Switching Frequency
Alpha 400 :200kHz (fixed : typ.)
Alpha 600 :200kHz (fixed : typ.)

[Alpha 800]
1)Alpha 800 available for 7 slots for the output
modules can be conformed the outputs.

2)The total outputs wattage of the Alpha 800 is

maximum 800W.
3)Each specified output wattage of the output module
derating is depend on arrangement of position in the
slots, output voltage setting and ambient

System Power Supply

temperature.
4)Internal input fuses
Alpha 800: 250V20A
5) Harmonics Current Correction Circuit Switching
Frequency
Alpha 800 :100kHz (fixed : typ.)
6)Converter Switching Frequency
Alpha 800 :200kHz (fixed : typ.)

183
 Specifications (please read the instruction manual before design)
䡵Alpha 250S Common specification
Alpha250S
1 NUMBER of SLOTS 4 Slots (6 channels max.)
2 INPUT VOLTAGE RANGE 85-265VAC(47-63Hz) 85-90VAC (required the output derating)
3 MAXIMUM TOTAL OUTPUT WATTAGE 250W
4 INPUT CURRENT typ. 4A: 100VAC/2A: 200VAC at full load
5 INRUSH CURRENT 40A max.
6 HARMONICS CURRENT CONTROL meet EN61000-3-2 (Harmonics current correction range: 85-255VAC)
7 POWER FACTOR typ. 0.99 (typ.): input 100VAC at full load / 0.95 (typ.): 230VAC at full load
8 EFFICIENCY (typ.) 75%: input 100/200VAC nominal outputs voltage at maximum total output power
9 MISSING CYCLE HOLD UP TIME (typ.) minimum 16mS: input 100/200VAC nominal outputs voltage at maximum total output power
10 LEAKAGE CURRENT maximum 0.95mA at full load
11 OPERATING AMBIENT TEMPERATURE 0~+60°C (0-50°C : 100%, +60°C : 75%)
12 OPERATING AMBIENT HUMIDITY 30~90%RH (no condensation)
13 STORAGE AMBIENT TEMPERATURE -30~+85˚C
14 STORAGE AMBIENT HUMIDITY 10~95%RH (no condensation)
15 COOLING Forced air cooling with internal fan
16 WITHSTAND VOLTAGE input - FG 1.5kVAC for one minute (20mA): input - output 3kVAC for one minute (20mA)
17 INSULATION RESISTOR minimum 100M ohm (output - FG 500VDC. 25˚C. 70%RH)
18 VIBRATION Vibration cycles at 10-55Hz, sweep time for one minute, 19.6m/s2 constant, X,Y,Z axis on each side for one hour with no input.
19 MECHANICAL SHOCK maximum 196.1m/s2
20 SAFETY STANDARDS Approved by UL1950, CSA950 (C-UL), EN60950(SEMKO), meet DENTORI (nominal input voltage 100VAC)
21 CONDUCTED E.M.I. meets EN55022-class A, meet VCCI-class A, CISPR Pub.22
22 RADIATED R.F.I. meets EN55022-class A, VCCI-class A, CISPR Pub.22
23 NOISE IMMUNITY meets EN61000-4-2 Level 4, EN61000-4-3 Level 3, EN61000-4-4 Level4 and EN61000-4-5 Level 3
24 WEIGHT (typ.) 1270g
25 SIZE (W x H x D) 126.5 x 49.5 x 259.5mm

䡵Alpha 250S Specification for Output Modules

For Slot 1&2 For Slot 3 or Slot 4
MAIN BOARD 3/5 5/3 5/12 24 - - - - - - - - - - -
System Power Supply

OUTPUT MODULE - - - - L A B C D E F G H J M
1. NUMBER of SLOTS 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1
2. RATED OUTPUT VOLTAGE V 3.3 5 5 3.3 5 12 24 3.3 5 12 24 5 3.3 5 12 5 24 12 12 12 24 24 24 5 5
3. MAXIMUM OUTPUT CURRENT A 35 16 35 16 35 8 10 10 10 8 4 5 5 5 4 5 2 4 4 4 2 2 2 5 5
4. OUTPUT VOLTAGE RANGE V 2.0 5.0 5.0 2.0 5.0 9.0 24.0 2.0 4.5 9.0 16.0 4.5 2.0 4.5 9.0 4.5 16.0 9.0 9.0 9.0 16.0 16.0 16.0 4.5 4.5
~3.9 ~5.7 ~5.7 ~3.9 ~5.7 ~15.0 ~28.0 ~3.9 ~5.5 ~15.0 ~28.0 ~5.5 ~3.9 ~5.5 ~15.0 ~5.5 ~28.0 ~15.0 ~15.0 ~15.0 ~28.0 ~28.0 ~28.0 ~5.5 ~5.5
5. MAXIMUM OUTPUT RIPPLE
AND NOISE VOLTAGE (*1) mV 100 100 100 100 100 240 480 100 100 240 480 100 100 100 240 100 480 240 240 240 480 480 480 100 100
6. MAXIMUM LINE REGULATION (*2) mV 25 25 25 25 25 60 72 25 25 60 72 25 25 25 60 25 72 60 60 60 72 72 72 25 25
7. MAXIMUM LOAD REGULATION (*3) mV 100 100 100 100 100 240 480 100 100 240 480 100 100 100 240 100 480 240 240 240 480 480 480 100 100
8. OVERLOAD CURRENT (*4) A 36.5 16.8 36.5 16.8 36.5 8.4 10.5 10.5 10.5 8.4 4.2 5.2 5.2 5.2 4.2 5.2 2.1 4.2 4.2 4.2 2.1 2.1 2.1 5.2 5.2
PROTECTION ~45.5 ~20.8 ~45.5 ~20.8 ~45.5 ~10.4 ~13.0 ~13.0 ~13.0 ~10.4 ~5.2 ~6.5 ~6.5 ~6.5 ~5.2 ~6.5 ~2.6 ~5.2 ~5.2 ~5.2 ~2.6 ~2.6 ~2.6 ~6.5 ~6.5
9. OVER VOLTAGE (*5) V 4.4 6.7 6.7 4.4 6.7 16.2 30 4.4 6.7 16.2 30 6.7 4.4 6.7 16.2 6.7 30 16.2 16.2 16.2 30 30 30 6.7 6.7
PROTECTION ~5.2 ~7.8 ~7.8 ~5.2 ~7.8 ~18.6 ~34.8 ~5.2 ~7.8 ~18.6 ~34.8 ~7.8 ~5.2 ~7.8 ~18.6 ~7.8 ~34.8 ~18.6 ~18.6 ~18.6 ~34.8 ~34.8 ~34.8 ~7.8 ~7.8

10. OPERATING AMBIENT TEMPERATURE 0~+60°C ( 0~+50°C : 100%, +60°C : 75% )

11. REMOTE SENSING Available (Main bord output, L module, A module only)
12. REMOTE ON/OFF CONTROL Available
13. SERIES OPERATION Available (can be operated in series between each output of Output Module and dual Outputs Module)
14. PARALLEL OPERATION Available (Please contact to Densei-Lambda before use in parallel operation of the Modules)
15. INPUT VOLTAGE DETECTOR SIGNAL Optionfor M J Module: detecting the output of the active filter (TTL open collector)
(*1) 100MHz (measured by the Japanese Standard EIAJ RC-9131) (*4) Constant Current Auto-Reset (pre-set before shipment: fixed the limitation)
(*2) Input Voltage 85 - 265VAC at constant load (*5) Shut Down method with Manual Reset (restart the input to be reset)
(*3) no-load to full-load, at constant input voltage (when use the remote sensing, the level will be the same as the line regulation.)

184
Specifications (please read the instruction manual before design)
䡵Alpha 400/600/800 Common specification
Alpha400 Alpha600 Alpha800
1 NUMBER of SLOTS 5 Slots (7 channels max.) 5 Slots (7 channels max.) 7 Slots (14 channels max.)
2 INPUT VOLTAGE RANGE 85-265VAC(47-63Hz) 85-90VAC (required the output derating)
3 MAXIMUM TOTAL OUTPUT WATTAGE 400W 600W 800W(1000W peak)
4 INPUT CURRENT typ. 7A: 100VAC/3.5A: 200VAC at full load 10A: 100VAC/ 5A: 200VAC at full load 13A: 100VAC/ 6.5A: 200VAC at full load
5 INRUSH CURRENT 20A max. 30A max. 40A max.
6 HARMONICS CURRENT CONTROL meet EN61000-3-2 (Harmonics current correction range: 85-255VAC)
7 POWER FACTOR typ. 0.99 (typ.): input 100VAC at full load / 0.95 (typ.): 230VAC at full load
8 EFFICIENCY (typ.) 75%: input 100/200VAC nominal outputs voltage at maximum total output power
9 MISSING CYCLE HOLD UP TIME (typ.) minimum 16mS: input 100/200VAC nominal outputs voltage at maximum total output power
10 LEAKAGE CURRENT maximum 0.95mA at full load
11 OPERATING AMBIENT TEMPERATURE 0~+60°C (0-50°C : 100%, +60°C : 75%)
12 OPERATING AMBIENT HUMIDITY 30~90%RH (no condensation)
13 STORAGE AMBIENT TEMPERATURE -30~+85˚C
14 STORAGE AMBIENT HUMIDITY 10~95%RH (no condensation)
15 COOLING Forced air cooling with internal fan
16 WITHSTAND VOLTAGE input - FG 1.5kVAC for one minute (20mA): input - output 3kVAC for one minute (20mA)
17 INSULATION RESISTOR minimum 100M ohm (output - FG 500VDC. 25˚C. 70%RH)
18 VIBRATION Vibration cycles at 10-55Hz, sweep time for one minute, 19.6m/s2 constant, X,Y,Z axis on each side for one hour with no input.
19 MECHANICAL SHOCK maximum 196.1m/s2
20 SAFETY STANDARDS Approved by UL1950, CSA950 (C-UL), EN60950(SEMKO), EN60601-1, UL2601-1, meet DENTORI
21 CONDUCTED E.M.I. meets EN55022-class A, meet VCCI-class A
22 RADIATED R.F.I. meets EN55022-class A, VCCI-classA
23 NOISE IMMUNITY meets EN61000-4-2 Level 4, EN61000-4-3 Level 3, EN61000-4-4 Level4 and EN61000-4-5 Level 3
24 WEIGHT (typ.) 2100g 2500g 3400g
25 SIZE (W x H x D) 126.5 x 63 x 274.5mm 126.5 x 63 x 318.5mm 175.5 x 63 x 279mm

䡵Alpha 400/600/800 Specification for Output Modules

Output Module name A B C D E F G H M N P Q R T
1. NUMBER of SLOTS 2 1 1 1 1 2 2 1 1 1 1 1 2 2

System Power Supply

2. RATED OUTPUT VOLTAGE V 5 5 12 24 12 12 12 24 24 24 12 24 24 12 3.3 3.3 2
3. MAXIMUM OUTPUT CURRENT A 60 25 16 8 8 8 33 25 5 5 8 5 5 8 25 60 60
4. OUTPUT VOLTAGE RANGE V 4.5 4.5 5.0 18.0 5.0 5.0 10.0 18.0 18.0 18.0 5.0 18.0 18.0 5.0 2.7 2.7 1.8
-5.5 -5.5 -15.0 -28.0 -15.0 -15.0 -15.0 -28.0 -28.0 -28.0 -15.0 -28.0 -28.0 -15.0 -3.9 -3.9 -2.4
5. MAXIMUM OUTPUT RIPPLE mV 100 100 240 480 240 240 240 480 480 480 240 480 480 240 100 100 100
AND NOISE VOLTAGE (*1) P-P
6. MAXIMUM LINE REGULATION (*2) mV 25 25 60 72 60 60 60 72 72 72 60 72 72 60 25 25 25
7. MAXIMUM LOAD REGULATION (*3) mV 100 100 240 480 240 240 240 480 480 480 240 480 480 240 100 100 100
8. OVERLOAD CURRENT PROTECTION (*4) A 63.0 26.3 16.8 8.4 8.4 8.4 34.6 26.2 5.2 5.2 8.4 5.2 5.2 8.4 26.3 63.0 63.0
-78.0 -32.5 -20.8 -10.4 -10.4 -10.4 -42.9 -32.5 -5.8 -5.8 -10.4 -5.8 -5.8 -10.4 -32.5 -78.0 -78.0
9. OVER VOLTAGE PROTECTION (*5) V 6.3 6.3 16.2 32.4 16.2 16.2 16.2 32.4 32.4 32.4 16.2 32.4 32.4 16.2 4.1 4.1 2.71
-7.0 -7.0 -18.6 -37.2 -18.6 -18.6 -18.6 -37.2 -37.2 -37.2 -18.6 -37.2 -37.2 -18.6 -4.7 -4.7 -3.0
10. OPERATING AMBIENT TEMPERATURE 0~+60°C ( 0~+50°C : 100%, +60°C : 75% )
11. REMOTE SENSING Available (without dual outputs module: E, H, P Module)
12. REMOTE ON/OFF CONTROL Option I J: output inhibits on each output (TTL level)
OUTPUT INHIBIT CONTROL MJ: output inhibits on all the outputs (TTL level)
13. SERIES OPERATION Available (can be operated in series between each output of Output Module and dual Outputs Module)
14. PARALLEL OPERATION Available (Please contact to Densei-Lambda before use in parallel operation of the Modules)
15. OUTPUT VOLTAGE MONITOR SIGNAL Option for I J Module: monitoring the output voltage up or down (TTL open collector)
16. INPUT VOLTAGE DETECTOR SIGNAL Option for M J Module: detecting the output of the active filter (TTL open collector)
(*1) 100MHz (measured by the Japanese Standard EIAJ RC-9131) (*4) Constant Current Auto-Reset (pre-set before shipment: fixed the limitation)
(*2) Input Voltage 85 - 265VAC at constant load (*5) Shut Down method with Manual Reset (restart the input to be reset)
(*3) no-load to full-load, at constant input voltage (when use the remote sensing, the level will be the same as the line regulation.)

185
 [Alpha 250S]

(Unit in mm)

Note 1. Name Plate (product name: indicate the specification of input/output)

Note 2. Please keep the space more than 50 mm for airflow.
Note 3. Please refer to the size of the Output Module.
Note 4. The tapped holes for fixing 9-M4 (the fixing screw thread length should not be
exceeded 4.5mm.)

[Alpha 400]

274.5Ⳳ1 (2)

63Ⳳ1 6 231Ⳳ0.5 SEE NOTE 4

SLOT

1
24.25

2
System Power Supply

AIR FLOW
80.5Ⳳ0.5
126.5Ⳳ1

24.25 24.25

3 FAN

(SEE NOTE 2)
4
65.75
24.25

5
26
23

2 SEE NOTE 4
3.5

22.5
9.5 9.5
15

OUTPUT MODULE
(SEE NOTE 3)
33Ⳳ0.5

INPUT

(Unit in mm)
6 249Ⳳ0.5

SEE NOTE 1

Note 1. Name Plate (product name: indication of the specification of input/output)

Note 2. Please keep the space more than 50 mm for airflow.
Note 3. Please refer to the next chapter of input output terminal.
Note 4. The tapped holes for fixing 8-M4 (the fixing screw thread length should not be
exceeded 4.5mm.)

186
[Alpha 600]
318.5Ⳳ1 (2)
63Ⳳ1 6 267Ⳳ0.5 SEE NOTE 4

24.75 24.75 24.75 24.75

AIR FLOW
126.5Ⳳ1

80Ⳳ0.5
FAN

(SEE NOTE 2)

66.75
26
23

2 SEE NOTE 4
3.5

22.5
9.5 9.5
15

OUTPUT MODULE
33Ⳳ0.5

INPUT
(SEE NOTE 3)

6 267Ⳳ0.5
(Unit in mm)
SEE NOTE 1

Note 1. Name Plate (product name: indication of the specification of input/output)

Note 2. Please keep the space more than 50 mm for airflow.
Note 3. Please refer to the next chapter of input output terminal.
Note 4. The tapped holes for fixing 8-M4 (the fixing screw thread length should not be
exceeded 4.5mm.)

[Alpha 800]

System Power Supply

(Unit in mm)

Note 1. Name Plate (product name: indication of the specification of input/output)

Note 2. Please keep the space more than 50 mm for airflow.
Note 3. Please refer to the next chapter of input output terminal.
Note 4. The tapped holes for fixing 8-M4
(the fixing screw thread length should not be exceeded 4.5mm.)
Note 5. The tapped holes for supporting 2-M4 on vertical mounting.
(the fixing screw thread length should not be exceeded 4.5mm)

187
 Specifications (please read the instruction manual before design)
䡵Alpha 1250 Common specification
Alpha1250-12 Alpha1250-24
1 Nominal Output Voltage 12V 24V
2 Maximum Output Current 104A 52A
3 Maximum Output Power 1248W 1248W
4 Efficiency (typ) (*1) 80%
5 Input Voltage Range (*2) 200 ~ 265VAC(47 ~ 63Hz)
6 Input Current (typ) 7.0A: 230VAC AT 1248W
7 Output Voltage Accuracy 11.88 ~ 12.12V 23.76 ~ 24.24V
8 Output Voltage Range (*3) Fixed
9 Maximum Ripple & Noise (*4) 240mV 480mV
10 Maximum Line Regulation 60mV 72mV
11 Maximum Load Regulation (*5) 240mV 480mV
12 Over Current Protection (*6) 105 ~ 112A 53 ~ 58A
13 Over Voltage Protection (*7) 16.2 ~ 18.6V 32.4 ~ 37.2V
14 Remote Sensing Possible(Max 1V for total drop)
15 Remote On/Off Available
16 Series / parallel operation Not available
17 Inrush Current (*8) 40A max. (Ta=25˚C Cold start)
18 PFHC Built to meet EN61000-3-2 (PFHC Range : 200 ~ 255VAC)
19 Power Factor 230VAC: 0.95 at 1248W
20 Over Output Power Protection more than 1260W
21 Hold-up time (typ) (*1) 10ms
22 Leakage Current (*1) Less than 0.95mA
23 Operating Temperature 0 ~ +50˚C
24 Operating Humidity 30 ~ 90%Rh (No Dewdrop)
25 Storage Temperature -30 ~ +85˚C
26 Storage Humidity 10 ~ 95%Rh (No Dewdrop)
27 Cooling Forced Air by Blower Fan
28 Withstand Voltage Input - FG: 1.5kVAC (20mA) for 1min. Input - Output: 3kVAC (20mA) for 1min.
29 Isolation Resistance More than 100MΩ Output - FG: 500VDC at 25˚C, 70%Rh
30 Vibration At no operating, 10 ~ 55Hz (Sweep for 1min) 19.6m/s2 Constant, X, Y, Z, 1hour each
31 Shock Less than 196.1m/s2
System Power Supply

32 Safety Standard Built to meet UL60950, CSA60950-00(C-UL), EN60950(SEMKO)

33 Conducted Emission Built to meet EN55022-A, VCCI-A
34 Radiated Emission Built to meet EN55022-A, VCCI-A
35 Immunity Built to meet EN61000-4-2 Level 4, EN61000-4-3 Level 3, EN61000-4-4 Level 4, EN61000-4-5 Level 3
36 Weight 3400g
37 Size (W x H x D) 175.5mm x 63mm x 279mm (Refer to Outline Drawing)
*Read instruction manual carefully, before using the power supply unit.
=NOTES=
(*1) At 230VAC Nominal output voltage and maximum output current. Total output power 1248W (Ta=25˚C)
(*2) For cases where conformance to various safety specs are required, input voltage range will be 200 ~ 240VAC (50/60Hz).
(*3) Factory Programmed (Available for Ⳳ 10% setting Range)
(*4) 100MHz B. W JEITA RC-9131 Method
(*5) When remote sense connected.
(*6) Constant Current Limit Auto recovery.
(*7) Output Shut Down Method Manual reset (Line recycle).
(*8) When resuming operation in less than 10 sec. after power failure at no load, soft start circuit will not limit the inrush current at turn - on.
Not applicable for the inrush current to Noise Filter less than 0.2 ms.

188
[Alpha 1250-12]

[Alpha 1250-24]

System Power Supply

189