NX350 3/98 REV B
Page 1
DESCRIPTION
The NX350 is a compact 350 watt Power Factor Corrected, multiple
output power supply. All outputs are fully isolated and regulated.
Active current sharing circuitry, together with control functions
and alarm options, simplifies N+1 and redundant applications.
Fan and disk drive applications are handled by the peak current
ratings of the auxiliary outputs.
FEATURES
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! Active Power Factor Correction
!
!
!
!
! Fully Isolated Outputs
!
!
!
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! Low Profile: 9" x 4.85" x 2.00"
!
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! One, Two, Three and Four Output Models
!
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! N+1 Current Sharing
!
!
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! FCC/VDE Class B EMI Filter Standard
!
!
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! Optional Fan Mounted On Cover
350 W
ATT
AC/DC P
OWER
S
UPPLY
NX350
Product Data Sheet
Internet: http://www.cdpowerelectronics.com
Power Electronics Division, United States
3400 E Britannia Drive, Tucson, Arizona 85706
Phone: 800.547.2537 Fax: 520.770.9369
Power Electronics Division, Europe
C&D Technologies (Power Electronics) Ltd.
132 Shannon Industrial Estate, Shannon, Co. Clare, Ireland
Tel: +353.61.474.133 Fax:+353.61.474.141
AGENCY APPROVALS
NX350 3/98 REV B
Page 2
Input Specifications
Parameter
Conditions
Min
Typ
Max
Units
Operating Range
47-63 Hz
90
264
V
AC
Inrush Current Limiting
120V
AC,
cold start
37
A
PK
240V
AC
cold start
70
A
PK
Efficiency
120V, full load
70
%
240V, full load
75
%
Power Factor Correction (PFC)
0.99
Meets IEC 1000-4-7/EN61000-3-2 (formerly IEC 555-2)
Remote Sense
Remote Sense is provided on Output #1 and will
compensate for 0.7V of line drop. Remote Sense leads are
protected against open, short and reversal.
Remote On/Of
The power supply is turned on with a TTL logic `1' (or open)
signal and turned off by a switch closure or TTL logic `0'
referenced to (-) sense terminal. Consult the factory for other
options.
Over Voltage Protection
Output #1: 6.5V 0.5 V
DC.
The power supply will latch off until AC power is cycled.
Over Current Protection
Individual current limit on all outputs. Automatic recovery
upon fault removal.
Transient Response
The peak output voltage excursion will not exceed 2% and
will recover within 1% in 200
sec for a 25% load step
change.
Output Isolation
All outputs are fully isolated.
Power Fail Signal
Upon AC input voltage removal, the power fail signal drops
to logic zero at least 5msec before loss of DC output. On
AC input turn-on, signal remains low until outputs are in
regulation. Consult the factory for other options.
N+1 Load Share
Output #1 has active load sharing circuitry. Units will load
share within 1.5% of Maximum Rated Load.
Over Temperature Protection
Thermal switch turns off power supply if overheating occurs
and automatically restarts.
Safety
UL Recognized: UL File Number E14675 (1950 & 1012)
CSA Certified:
CSA File Number LR 9070-154C
(C22.2 No. 234-M90, Level 6)
TUV License Number: R9576031 (EN60950) (IEC950)
Cooling
The unit is designed to operate with 30 CFM of airflow.
NX350 3/98 REV B
Page 3
Output Specifications
Parameter
Limits
Regulation
Line
0.03%
Load
0.25%
Cross
0.05%
Minimum Load
Output #1
3.0A
Auxiliary Outputs
0.1A
Hold-Up Time
20mSec at Full Load
Output Voltages and Maximum Rated Loads
OUTPUT #1
OUTPUT #2
OUTPUT #3
OUTPUT #4
MODEL NUMBER
V
OUT
I
MAX
V
NOM
I
MAX
/I
PK
V
NOM
I
MAX
/I
PK
V
NOM
I
MAX
/I
PK
NX350-U3A
5V
50A
12V
10A/12A
12V
8A/10A
-
-
NX350-U3B
5V
50A
15V
10A/12A
15V
8A/10A
-
-
NX350-U4C
5V
50A
12V
10A/12A
12V
8A/10A
5V
3.0A/4.0A
NX350-U4D
5V
50A
12V
10A/12A
12V
8A/10A
24V
1.5A/2.0A
NX350-U4E
5V
50A
12V
10A/12A
12V
8A/10A
12V
3.0A/4.0A
NX350-U4F
5V
50A
15V
10A/12A
15V
8A/10A
5V
3.0A/4.0A
NX350-U4G
5V
50A
15V
10A/12A
15V
8A/10A
24V
1.5A/2.0A
NX350-U4H
5V
50A
15V
10A/12A
15V
8A/10A
12V
3.0A/4.0A
Note: Peak current ratings are for 10sec maximum. Total power not to exceed 350 watts.
Parameter
Conditions
Min
Typ
Max
Units
Voltage Adustment Range
Nominal line on all outputs
5
%
PARD
Peak-to-peak 20 MHz bandwidth
1
%
Temperature
Operating
0
50
C
Derates to half power
70
C
Storage
-20
+85
C
Temperature Coefficient (T
C
)
After half hour warm-up
0.02
%/C
NX350 3/98 REV B
Page 4
Terminal Block 1
Terminal Block 2
POS
FUNCTION
POS
FUNCTION
1
AC Line
1
-V2
2
AC Neutral
2
+V2
3
Ground
3
-V3
4
+V3
5
-V4
6
+V4
J9 Connector
J9 Connector
PIN
FUNCTION
Molex No.
1
+ Sense
Connector 22-28-1090
2
- Sense
3
N/C
4
N/C
5
Start Up Sync.
6
Power Fail
7
Remote Inhibit
8
Current Share
9
Cntl Signal Rtn
Mechanical
8.50
0.25
0.55
3.90
9.00
4.85
1.95
0.040
COVER
OUTPUT NO. 1
TB2
J9
5v RETURN
5v
6-32 THD 4 PLC'S
Maximum depth of mounting
screws is 0.156 inches
TB1
NOTES:
All measurements are in inches
FAN MOUNTED ON COVER WILL ADD 1.30".
COOLING: The NX350 is designed to operate with 30 CM airflow.
SHOCK AND VIBRATION: The NX350 meets the requirements of MIL STD-810D. (Vibration-Method 514.3 Procedure I; Shock-Method 516.3 Procedure I.)
WEIGHT: Approximately 3 lbs.
TOP VIEW
Standard Options are shown, consult factory for other available options.
The information provided herein is believed to be reliable; however, C&D Technologies assumes no responsibility for inaccuracies or omissions. C&D Technologies assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without
notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. C&D Technologies does not authorize or warrant any C&D
Technologies product for use in life support devices/systems or in aircraft control applications.
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