NMX-750, Power Factor Corrected
Multiple Output, Forced Current Sharing
FEATURES:
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Forced current sharing for N +1 redundancy
Remote sense on outputs #1 and 2
Universal ac input
0.99 typical power factor
Dual converter design eliminates interaction between
logic and auxiliary outputs
Low ripple and noise on all outputs
Dc power good and ac power fail signals
True remote inhibit
Monotonic turn-on and turn-off
SPECIFICATIONS:
INPUT
Ac Input:
90-264 Vac continuous range, 47 to 63 Hz. Internally
fused for 15 A.
Power Factor:
0.99 typical at full load. Meets EN61000-3-2 Class A.
Inrush:
Cold start ac current is less than 65 A at 115 Vac and
130 A at 230 Vac. Limited by thermistor.
Brownout Protection:
Holds regulation to 85 Vac.
Holdup Time:
20 ms minimum after removal of power at full load.
Efficiency:
75% typical.
Ac Power Fail:
Provides TTL “0” 5 ms before output voltage
goes out of regulation band upon loss of ac power.
OUTPUT
Adjustability:
Outputs #1 and 2 user adjustable ±5% minimum.
Output #3 tracks #2; initial accuracy ±4%. Output #4 user
adjustable ±5% minimum, or +5% only if voltage is 5.2 V.
Line & Load Reg:
Outputs #1, 2, and 4 hold ±1% over ac input
range and 0 to 100% load change. Output #3 requires 20%
minimum load on outputs #2 and 3 to hold ±4%.
Ripple & Noise:
Less than 1% p-p or 100 mV, whichever is greater.
Remote Sense (Outputs #1 and 2):
Compensates for 250 mV
total line drop. Open sense lead protection. (See Redundancy.)
Temperature Coefficient (Outputs #1, 2, and 4):
0.02% per
degree C.
Stability:
0.1% over 8 hours after 30 minutes warm-up.
Transient Response (Outputs #1, 2, and 4):
Output voltage
returns to within 1% in less than 500 µs for a 50% load change.
Peak transient does not exceed 5%.
Overload Protection:
All outputs are protected against overload
and short circuit. Automatic recovery upon removal of fault.
Overvoltage Protection (Outputs #1 and 2):
Protects load
against power supply induced over voltage. Trip point is factory
set so that output voltage cannot exceed 136% of nominal.
Peak Output Current:
Dual current ratings define continuous
and peak currents. The peak current shown can be delivered for
a maximum period of 30 seconds.
Remote Inhibit:
Contact closure to the negative sense line or a
TTL level “0” turns off dc outputs.
Dc Power Good:
Provides a TTL “1” when output #1 is above
4.6 V nominal.
Redundancy:
External OR-ing diodes and forced current
sharing on output #1 provide “N+1” capability. Remote Sense
(+S) compensates for additional 0.6 V diode voltage drop. When
the current sharing terminal is connected between units, current
sharing remains within 10% of the unit’s full output current rating.
Requires minimum load of 12.5 A on +5V.
ENVIRONMENTAL
Thermal Protection:
Shuts down power supply if overheated.
Automatic recovery.
Temperature Range:
0° to 50° C at full ratings.
Safety Agencies:
Most models are approved to UL1950; CSA
22.2 #234; IEC 950 and TÜV EN60950, Class 1 SELV., CE 72/23/
EEC/93/68EEC (low voltage directive).
Conducted RFI:
Meets FCC Part 15, Class A; EN55022 Class A.
Output Isolation:
Isolated from ground 50 Vdc.
Reverse Voltage:
Protected against reverse voltage up to
supply current rating.
Cooling:
Self cooled with internal ball-bearing fans.
OPTIONS:
Option “B”, Barrier Strip:
Provides auxiliary output connec-
tions on #6-32 terminal screws with 3/8” centers.
AC INPUT(90-264 VAC Continuous Range)
FUNCTION
TB1-(L)
TB1-(N)
TB1-(GND)
Line
Neutral
Safety Ground
115 VAC
Line 1
Line 2
Safety Ground
230 VAC
CONNECTOR
Barrier strip
#6-32 screws, 3/8" centers
DC OUTPUT
FUNCTION
Output #1
LOCATION
Terminal marked +V
Terminal marked -V
Output #2
J6-3, 11, 4, 12
J6-5, 13, 6, 14, 7, 15
Output #3
J6-8, 16
J6-5, 13, 6, 14, 7, 15
Output #4
J6-1, 9
J6-2, 10
Rtn (common)
(+) Floating Output
(-) Floating Output
Rtn (common)
NOTES
Main output
Rtn (common)
Bus bars
#1/4-20 screws
AMP#770974-1 mates
with connector 770583-1
with sockets #171639-1
(AWG #20 to #16)
CONNECTOR
STATUS AND CONTROL
FUNCTION
Remote Sense
LOCATION
J1-5
J1-4
DC Power Good
Inhibit
Current Share
Remote Sense
J1-3
J1-2
J1-1
J3-1
J1-4
Ac Power Fail
J3-3
NOTES
Output #1 Sense
Output #1 Sense Rtn
Reference to common
when #1 Sense Rtn is
Ter minated
Output #2 Sense
Output #2 Sense Rtn
Reference to commom
AMP MTA type
#640456-4 pin
header (locking)
CONNECTOR
AMP MTA type
#640456-5 pin
header (locking)
90
Condor D.C. Power Supplies, Inc., 2311 Statham Parkway, Oxnard, CA 93033
800-235-5929 • 805-486-4565 • FAX 805-487-8911 • www.condorpower.com
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