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MPPS-4000 Series
Operator's Manual
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SynQor MPS-4000 Series, MPPS-4000 Series Operator's Manual

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Military Field-Grade Power SuPPly
Operator’s Guide
MPS-4000 Series & MPPS-4000 Series
MPS-4000-1U
Made in USA
1.888.567.9596 (USA only) | SynQor Headquarters 155 Swanson Road, Boxborough, MA 01719-1316 USA | www.synqor.com
MPPS-4000-1U
Table of Contents
Section I Warnings
Hazardous Voltages ...................................................................................................................................................4
Hazardous Energies ................................................................................................................................................... 5
Protection from the Environment .........................................................................................................................5
User Serviceable Parts ...............................................................................................................................................5
Section II General Product Information
Product Description ................................................................................................................................................... 6
Product Topology: MPS ............................................................................................................................................. 7
Product Topology: MPPS ..........................................................................................................................................8
Part Numbering Scheme and Options: MPS .....................................................................................................9
Part Numbering Scheme and Options: MPPS ............................................................................................... 10
Product Specifications............................................................................................................................................ 11
Technical Specifications: MPS ............................................................................................................................ 12
Technical Specifications: MPPS .......................................................................................................................... 13
Programmable Features: MPPS .......................................................................................................................... 13
Technical Specifications: MPS & MPPS ........................................................................................................... 14
1U Mechanical Diagram ....................................................................................................................................... 15
Efficiency: MPS.......................................................................................................................................................... 16
Total Output Power: MPS ...................................................................................................................................... 17
Efficiency: MPPS ....................................................................................................................................................... 18
Total Output Power: MPPS ................................................................................................................................... 19
Temperature Derating ............................................................................................................................................ 20
MPS Droop Characteristics - All Ouput Voltages ........................................................................................ 21
MPPS Overload Characteristics ........................................................................................................................ 22
Power Cable Wiring Diagram ............................................................................................................................. 23
006-0006715 10/31/18 Rev J 2 of 44 MPS-MPPS-4000 Guide www.synqor.com
Section III Operation
Set-Up ........................................................................................................................................................................... 24
Start-Up ....................................................................................................................................................................... 24
Shut-Down .................................................................................................................................................................. 24
Power Cable Connections...................................................................................................................................... 25
Programming The Output: MPPS Only ........................................................................................................... 26
Programming the Output From the Web Interface ............................................................................. 26
Programming the Output From the RS-232 Interface ....................................................................... 27
Cooling System .......................................................................................................................................................... 28
Front Panel Indicators ........................................................................................................................................... 29
Operating Environment ......................................................................................................................................... 33
Section IV Control Interface Details
Control Cable Connections ................................................................................................................................... 34
Internal User I/O Circuits ............................................................................................................................. 35
Remote On/Off Switch Connections ......................................................................................................... 35
Digital Input/Output Control Signals ............................................................................................................... 36
RS232 Serial Interface ............................................................................................................................................ 36
Ethernet Interface .................................................................................................................................................... 37
Synchronized Operation of Multiple Units: MPS .......................................................................................... 38
Turn-On, Turn-Off, Restart Control: ......................................................................................................... 38
Fault Synchronization Control: ................................................................................................................... 38
Parallel Operation of Multiple Units: MPPS .................................................................................................. 39
Turn-On, Turn-Off, Restart Control: ......................................................................................................... 39
Parallel Operation, Current sharing: ........................................................................................................ 39
Section V Maintenance
Fans ............................................................................................................................................................................... 40
Cleaning ....................................................................................................................................................................... 40
Section VI Trouble-Shooting Guide
Fault Conditions ....................................................................................................................................................... 41
006-0006715 10/31/18 Rev J 3 of 44 MPS-MPPS-4000 Guide www.synqor.com
Section I Warnings
Section I Warnings
Hazardous Voltages
The INPUT AND OUTPUT POWER connectors and cables of the SynQor MPS/MPPS may have voltages that are unsafe. INJURY OR DEATH ON CONTACT may result. Appropriate safety precautions should be taken. All connections should be made in accordance with
LOCAL ELECTRICAL CODES.
• The CHASSIS should be connected to earth or system ground with Ground Stud on the rear
panel, see mechanical diagrams.
• For the AC INPUT cable and connector: ▪Do not assume that a hazardous voltage is not present at the terminals of the AC input
connector, even if the MPS/MPPS appears to be o.
▪ Do not make contact with the terminals of the AC input connector.
▪ Always connect the cable to the MPS/MPPS before it is connected to the source of AC power.
▪ Always disconnect the AC input cable from the source of AC power before disconnecng
it from the MPS/MPPS.
▪ If the AC input cable is connected to the source of AC power and not connected to the
MPS/MPPS, do not contact the exposed terminals of the AC input cable.
▪ Do not assume that the source of AC power is not present.
▪ Connecons between the AC input cable and the source of AC power should not be accessible.
• For the MPPS DC OUTPUT cable and connector:
▪ The DC output terminals of the MPPS may be hazardous, depending on the model and user
commanded voltage. Never assume the terminals of the DC output connector or the wires
of the DC output cable are safe to contact, even if the MPPS appears to be o.
▪ The DC output terminals of the MPPS are isolated from the AC input with reinforced
safety insulation.
• For the MPS DC OUTPUT cable and connector:
▪ The rated DC output voltage of the MPS is below the level considered hazardous.
▪ The DC output terminals of the MPS are isolated from the AC input with reinforced
safety insulation.
▪ However, never assume the terminals of the DC output connector or the wires of the DC
output cable are safe to contact, even if the MPS appears to be o.
006-0006715 10/31/18 Rev J 4 of 44 MPS-MPPS-4000 Guide www.synqor.com
Section I Warnings
Hazardous Energies
The INPUT AND OUTPUT POWER connectors and cables of the SynQor MPS/MPPS may be the source of high levels of energy. Do not inappropriately make electrical contact between any terminal of a connector and another, or between any wire of a cable and another, or between any terminal or wire and the MPS/MPPS Unit’s chassis or ground. DAMAGING ELECTRICAL ARCS may result. Care should be taken to avoid accidental electrical contacts of this sort.
Protecon from the Environment
The SynQor MPS/MPPS is a ruggedly built product having its electronics contained in a sealed
chamber. It is capable of withstanding harsh levels of mechanical acceleraon, shock and vibraon, temperature and pressure variaons, and exposure to water, salt, sand and dust within the levels specied in the data sheet. THESE LEVELS SHOULD NOT BE EXCEEDED.
Do not obstruct the air intake in the front of the MPS/MPPS or the fan exhausts in the rear
panel of the MPS/MPPS while the MPS/MPPS is operang.
User Serviceable Parts
MPS/MPPS-4000 fans are user replaceable with kits available from SynQor. Please contact the
SynQor factory for obtaining fan replacement kits and instrucons (Replaceable Fan Module
SYN-9450). The SynQor MPS/MPPS has no other user serviceable parts inside of it. DO NOT REMOVE the cover of the MPS/MPPS or any of its connectors. Other than fan assembly
replacement, only factory trained personnel should perform repairs.
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Section II General Product Information
Product Descripon
SynQor’s Military AC-DC Power Supply Units are designed for the extreme environmental and
demanding electrical condions of Military/Aerospace applicaons. SynQor’s MPS and MPPS incorporate eld proven high eciency designs and rugged packaging technologies. The MPS
and MPPS will accept a 3-Phase input with a wide range of input voltage and frequency values
while delivering a well‑condioned connuous 4000 W, xed DC output to the load. It is designed and manufactured in SynQor’s USA facilies to comply with a wide range of military standards.
A communicaon/control port is available to permit monitoring and control by a host computer system. Front panel LEDs provide informaon on the status of the MPS. For MPPS Units, the communicaon port allows the user to set the output voltage, and output current.
The electronic circuitry within the MPS‑4000 and MPPS‑4000 Series products is designed, qualied
and screened according to SynQor’s MIL-COTS Standards. It complies with the requirements of MIL-STD-704F, MIL-STD-1399-300B, MIL-STD-1275D and MIL-STD-461F, as well as IEC-EN61000
specicaons for world‑wide commercial ulity applicaons.
The MPS-4000 and MPPS-4000 Series products are designed and manufactured to withstand
the harsh environments and use encountered in military applicaons. The electronic circuitry is
contained in a sealed chamber constructed from a die-cast aluminum chassis that is weather-proof
and shock‑proof. Redundant, water‑proof fans on the rear panel draw cooling air over the heat‑ sink ns below the sealed chamber. Military‑grade circular connectors are used, and oponal aached connector covers are available for when the cables are not aached. The MPS‑4000 and MPP‑4000 Series products comply with a wide range of tesng according to MIL‑STD‑810G.
The SynQor MPS-4000 Series and MPPS-4000 Series products are designed and manufactured in the U.S.A.
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Section II General Product Information
OUTPUT
Product Topology: MPS
The SynQor MPS‑4000 Series products use an isolated topology that provides protecon to
the load from spikes, noise, surges, brownouts, blackouts, etc. in the input power sources.
They also provide smoothing of load transients and nonlinear load proles so that the input
power source is not subjected to these disturbances.
EMI lters are present at all external inputs and outputs
AC
INPUT
AC to DC
w/ PFC
and
ISOLATION
INTERFACE
CONTROL
OUTPUT
FILTERING
OUTPUT
CAPACITOR
MAIN
DC
Power ows from the AC INPUT through an AC‑DC converter that has Power Factor Correcon (PFC) and high‑frequency safety isolaon.
The DC outputs at various voltage and power levels are available. The DC can deliver up to
4000 W (5250 W transient) output.
Bulk energy storage capacitors are connected to the mid-bus to help smooth imbalances in
power ow between the inputs and outputs of the MPS.
There is a communicaon/control port that provides a digital interface to a host computer system.
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Section II General Product Information
Product Topology: MPPS
Similar to the MPS-4000, the MPPS-4000 Series products use an isolated topology that
provides protecon to the load from spikes, noise, surges, brownouts, blackouts, etc. in the
input power sources. They also provide smoothing of load transients and nonlinear load
proles so that the input power source is not subjected to these disturbances. The MPPS adds an extra regulaon stage to the output, which allows the user to adjust the output
voltage and current.
EMI lters are present at all external inputs and outputs.
AC
INPUT
AC to DC
w/ PFC
and
ISOLATION
INTERFACE
CONTROL
DC-DC
w/ Digitally
Controlled
Vset, Imax
Ideal
Diode
OUTPUT
FILTERING
MAIN
DC
OUTPUT
Power ows from the AC INPUT through an AC‑DC converter that has Power Factor Correcon (PFC) and high‑frequency safety isolaon.
The DC outputs at various voltage and power levels are available. The DC output voltage, and maximum output current can be programmed by the user. The DC output can deliver
up to 4000W.
Bulk energy storage capacitors are connected to the mid-bus to help smooth imbalances in
power ow between the inputs and outputs of the MPPS.
An ideal diode on the output of the MPPS prevents circulang currents when Units are placed
in parallel. The ideal diode also provides some degree of redundancy should one MPPS in a paralleled system experience a failure.
There is a communicaon/control port that provides a digital interface to a host computer
system. This port is used to program the output voltage and output current.
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Section II General Product Information
Part Numbering Scheme and Opons: MPS
This table shows the part numbering scheme for the full line of SynQor MPS products:
Family
MPS 4000: 4000 W 1U: 1.73” 3: 3 Phase W: 47-800 Hz
For valid part numbers, refer to the website or contact your local sales representative.
Part Numbering Example: MPS-4000-1U-3W2ES00-E00
Output
Power
Height
AC Input
Phase #
AC Input
Frequency
DC Output
Voltage
Range
2D: 28 V 2E: 30 V 4B: 48 V
Output Regulation Network
S00: Semi-regulated E00: Ethernet/SNMP
The MPS‑4000 Series of products provide up to 4000 W (5250W transient) of total output power.
Opons that can be specied according to the part numbering scheme shown in the table include:
• The allowable frequency of the AC INPUT can be in the 47‑800 Hz range.
• The nominal output voltage of the MPS‑4000 Series can be 28 V, 30 V, or 48 V.
• The DC OUTPUT is semi-regulated, meaning that the voltage droops slightly as the output
current increases. This facilitates current sharing when Mulple Units are connected in parallel.
• RS232 serial port and logic‑level I/O communicaon are included in the standard model. An
Ethernet port providing web and SNMP interfaces is standard.
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Transit Case Option
Section II General Product Information
Part Numbering Scheme and Opons: MPPS
This table shows the part numbering scheme for the full line of SynQor MPS products:
Family
MPPS 4000: 4000W 1U: 1.73” 3: 3 Phase W: 47-800Hz
For valid part numbers, refer to the website or contact your local sales representative.
Part Numbering Example: MPPS-4000-1U-3W28-150-E00
Output
Power
Height
AC Input
Phase #
AC Input
Frequency
DC Output
Voltage
Range
28: 0-35V 48: 0-55V 72: 0-80V
Output Current
Range
150: 0-150A 120: 0-120A
078: 0-78A
Network
E00: Ethernet/SNMP
The MPPS‑4000 Series of products provide up to 4000 W of fully regulated DC output power. Various opons can be specied according to the part numbering scheme shown in the table:
• The allowable frequency of the AC INPUT can be in the 47‑800 Hz range.
• The default output voltage of the MPPS‑4000 Series can be 28 V, 48 V, or 72 V. These models
are capable of 150A, 120A, and 78A maximum current respecvely.
• The DC OUTPUT is fully regulated.
• When placed in parallel, Units use a communicaon cable to ensure they are sharing evenly.
Each Unit will share to within +/- 3A of the average current at full load. All Units must have the same output voltage programmed in order to share current evenly.
• RS232 serial port and logic‑level I/O communicaon are included in the standard model.
An Ethernet port providing web and SNMP interfaces is standard. The output voltage and
current can be set via the RS‑232 or web interfaces.
006-0006715 10/31/18 Rev J 10 of 44 MPS-MPPS-4000 Guide www.synqor.com
Section II General Product Information
Product Specicaons
The following three pages show the electrical and mechanical specicaons of the MPS‑4000‑1U & MPPS‑4000‑1U Series of products. Data sheets showing these specicaons and other informaon can be found at the web site http://www.synqor.com/MPS.
MPS-4000-1U Unit or MPPS-4000-1U Unit Front Panel
1.73" 1U
On/Off Switch
Output
Status Indication Panel
Air intake
17.00"
MPS-4000-1U Unit or MPPS-4000 1U Unit Rear Panel Rear Panel
DC
Fan
Exhaust
Ethernet
Port
User
I/O
CONFIG
Port
AC
Input
Fan
Exhaust
Ground
Stud
(1/4-20)
Circuit
Breaker
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Section II General Product Information
Technical Specicaons: MPS
MPS INPUT CHARACTERISTICS
Operating AC Input
Voltage 3-Phase, 80-265 Vrms Frequency 47-800 Hz Input Power Factor >0.98 at 47-65 Hz
>0.97 at 400 Hz >0.92 at 800 Hz
Maximum Input Current
AC Input Circuit Breaker Rating 30 Arms
*PowerDerangvs.Vrms
27 Arms May be programmed to less via communications port
(seeFigure2)
L-L
MPS OUTPUT CHARACTERISTICS
Total Output Power
*
L-L
Continuous 4000 W 15 s Transient 5250 W
Nominal DC Output Voltage at No Load
28 Vout 29.7 V 30 Vout 32.2 V 48 Vout 51.5 V
DC Output Voltage over Line, Load & Temperature
(Semi-regulated, see Figures 3-5) 28 Vout 30.3-27.6 V 30 Vout 32.8-29.9 V 48 Vout 52.5-47.9 V
Maximum Output Capacitance
28 Vout 255 mF 30 Vout 222 mF 48 Vout 86.8 mF
Output Ripple Voltage (20MHz BW)
All Output Voltages 0.5% peak-to-peak of rated Vout
Hold-up Time
To -20% rated Vout, 4000 W 10 ms
Turn-on Delay
All Output Voltages 2 s max.
Output Voltage Response to Load Transient
Iout steps from 50-75% 3% typ. / 6% max. deviation at 0.2 A/μs 100 ms recovery
Over-voltage Protection
Cyclic Restart 110-120% rated Vout
Short Circuit Protection
Cyclic Operation 115% rated Iout
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Section II General Product Information
Technical Specicaons: MPPS
MPPS INPUT CHARACTERISTICS
Operating AC Input
Voltage 3-Phase, 80-265 Vrms Frequency 47-800 Hz Input Power Factor >0.98 at 47-65Hz
>0.97 at 400Hz
>0.92 at 800Hz Maximum Input Current Continuous 27 A AC Input Circuit Breaker Rating 30 A (Continuous full load, 110 Vrms *Power Derating below 110 Vrms
)
L-L
(see Figure 2)
L-L
Programmable Features: MPPS
MPPS OUTPUT CHARACTERISTICS
Total Output Power Continuous 4000 W
*
L-L
Output Ripple Voltage (20MHz BW)
28 V Default (MPPS-4000-3W28) 25 mV max. 48 V Default (MPPS-4000-3W48) 38 mV max. 72 V Default (MPPS-4000-3W72) 50 mV max.
Current Limit Inception
All Models 110%-120% Current Set point
Hold-up Time
To -20% rated Vout, 4000 W 10 ms
Turn-on Delay
All Output Voltages 2 s max.
Output Voltage Response to Load Transient
Iout steps from 50-75% at 0.2 A/μs
28 V Default (MPPS-4000-3W28) 1 V max 48 V Default (MPPS-4000-3W48) 1.5 V max 72 V Default (MPPS-4000-3W72) 2 V max.
Short Circuit Protection
Constant current source 110-120% Current Set point
See Figure 4
Model Part Number
28V Default
(MPPS-4000-3W28)
48V Default
(MPPS-4000-3W48)
72V Default
(MPPS-4000-3W72)
MPPS PROGRAMMABLE FEATURES
Programmable
Voltage Range
0 - 35 V 0 - 150 A
0 - 55 V 0 - 120 A
0 - 80 V 0 - 78 A
Programmable
Current Range
Voltage Set Point
Accuracy
±5 mV typical ±25 mV max.
±8 mV typical
±38 mV max.
±10 mV typical
±50 mV max.
Maximum Output Current
(Short Circuit)
180 A
145 A
95 A
006-0006715 10/31/18 Rev J 13 of 44 MPS-MPPS-4000 Guide www.synqor.com
Section II General Product Information
Technical Specicaons: MPS & MPPS
ENVIRONMENTAL CHARACTERISTICS MIL-STD-810G
Temperature Methods 501.5, 502.5
Operating Temperature
Full Rated Power -40 °C — +55 °C Reduced Power per Figure 6 -40 °C — +70 °C
Storage Temperature -40 °C — +70 °C
Altitude Method 500.5
Operating 0 - 18,000 ft Non-operating 0 - 40,000 ft
Environmental Tests
Shock/Drop Method 516.6, Procedures 1,4,6 Temperature Shock Method 503.5, Procedure 1 Vibration Method 514.6, CAT 5, 7, 8, 9, 24 Fungus Method 508.6 Salt Fog Method 509.5 Sand and Dust Method 510.5, Procedures 1,2 Rain Humidity Mechanical Vibrations of Shipboard Equipment
RELIABILITY CHARACTERISTICS MIL-HDBK-217F
MTBF 240 kHrs MIL-217F Ground Benign, Ta=25 °C
ELECTROMAGNETIC CAPABILITY MIL-STD-461F
CE101 30 Hz - 10 kHz CE102 10 kHz - 10 MHz CS101 30 Hz - 150 kHz CS106 10 kHz - 40 GHz CS114 10 kHz - 200 MHz CS116 10 kHz - 100 MHz RE101 30 Hz - 100 kHz RE102 10 kHz - 18 GHz RS101 30 Hz - 100 kHz RS103 2 MHz - 40 GHz
Method 506.5 Procedure 1 Method 507.5 Procedure 2
Method 528 Procedure 1
MECHANICAL CHARACTERISTICS
1U Standard Battery Pack Chassis
Chassis Size Case Material Total Weight
Connectors
AC Input Connector DC Output Connector (+) DC Output Connector (-) User I/O Ports
Conguration I/O Port
Ethernet Port
Cooling Exhaust Fans
Sound Pressure Level (SPL) Air Flow
Two fans in system, above specs are for each fan separately.
1.73”(1U)H x 17.00”W x 20.42”D Aluminum
28 lbs
MS3470L18-8PW
CGE2E18H5FB-16
CGE2E18H5FWB-16
HD DB15 Female
HD DB15 Male
Amphenol RJF22N00, Code B
54 dB(A)
0.67(m3/min) 23.7 CFM
006-0006715 10/31/18 Rev J 14 of 44 MPS-MPPS-4000 Guide www.synqor.com
Section II General Product Information
1U Mechanical Diagram
17.00" [431.8]
.750
"[19.05]
20.42
"
19.34 [491.1]
"
[518.6]
16.000 [406.4]
"
®
MADE IN USA
MPS
1.49
" [37.8]
1.73"[43.9]
.750
"[19.05]
.313
.860
.750
"[19.05]
"[7.95] TYP.
"[21.84]
UNIT MOUNTING HOLES 8-32
.250"
x24
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Section II General Product Information
Efficiency (%)
208 Vrm s L -L Continuous
208 Vrm s L -L Transient
115 Vrm s L -L Continuous
115 Vrm s L -L Transient
Eciency: MPS
Figure 1 shows the typical eciency with which the MPS‑4000 series power supplies delivers power to its DC OUTPUT from a 208 Vrms
100
95
90
85
80
AC INPUT and an 115 Vrms
L-L
AC INPUT:
L-L
75
70
65
0 1000 2000 3000 4000 5000
Output Power (W)
Figure 1
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Section II General Product Information
Input AC Voltage (V
)
Trans ient 2s
Continuous
Table III Transient
Table II St eady-state
Total Output Power: MPS
The total MPS output power for the MPS‑4000 series is rated at 4000 W (5250 W TRANSIENT)
for an ambient temperature as high as 55oC (131oF).
However, when the AC INPUT voltage is at the low end of its range (<100 Vrms its low and high range (140 Vrms
‑ 160 Vrms
L-L
) the MPS will not be able to deliver its full
L-L
) or between
L-L
rated output power in both the steady‑state and transient situaons. Fig. 2 indicates the total steady‑state and transient output power that the MPS can deliver under these condions.
MIL-S TD-1399115VL-L
6000
5000
4000
3000
2000
Output P ower (Watts)
1000
0
60 80 100 120 140 160 180 200 220 240 260 280
MIL-S TD-1399 200VL-L
Table II St eady-state
Table III Transient
Figure 2
rmsL- L
MIL-STD-1399
3Φ Voltage
Ranges Shown
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Section II General Product Information
115 Vrms L-L Con tinuous
Eciency: MPPS
Figure 3 shows the typical eciency with which the MPPS‑4000 series power supplies delivers power to its DC OUTPUT from a 208 Vrms regulaon stage of the MPPS causes the eciency to be slightly lower when compared to an MPS. Also note that there is no transient rang for the MPPS.
100
95
90
85
AC INPUT and an 115 Vrms
L-L
AC INPUT. The extra
L-L
80
Efficiency (%)
75
70
65
0 1000 2000 3000 4000
Output Power (W)
208 Vrms L-L Con tinuous
Figure 3: Eciency vs Output Power
006-0006715 10/31/18 Rev J 18 of 44 MPS-MPPS-4000 Guide www.synqor.com
Section II General Product Information
Input AC Voltage (V
)
Continuous
Table III Transient
Table II St eady-state
Total Output Power: MPPS
The total MPPS output power for the MPPS‑4000 series is rated at 4000 W for an ambient
temperature as high as 55oC (131oF).
However, when the AC INPUT voltage is at the low end of its range (<100 Vrms low and high range (140 Vrms
‑ 160 Vrms
L-L
) the MPPS will not be able to deliver its full rated
L-L
) or between its
L-L
output power in both the steady‑state and transient situaons. Figure 4 indicates the total steady‑state and transient output power that the MPPS can deliver under these condions.
Unlike the MPS, the MPPS does not have a transient power rang. Exceeding 4000W under any condion will cause the output voltage to fold back.
MIL-S TD-1399115VL-L
5000
4000
3000
2000
Output P ower (Watts)
1000
MIL-S TD-1399 200VL-L
Table II St eady-state
Table III Transient
MIL-STD-1399
3Φ Voltage
Ranges Shown
0
60 80 100 120 140 160 180 200 220 240 260 280
006-0006715 10/31/18 Rev J 19 of 44 MPS-MPPS-4000 Guide www.synqor.com
rmsL- L
Figure 4
Section II General Product Information
DC Output Power (W)
VAC > 105 Vrms L-L
VAC 105 to 95 Vrms L-L
VAC < 95 Vrms L-L
Temperature Derang
The maximum steady‑state MPS or MPPS output power as a funcon of ambient air
temperature and AC input voltage is shown below in Figure 5.
4500
4000
3500
3000
2500
2000
1500
1000
500
0
40 45 50 55 60 65 70 75
Ambient Temperature (°C)
Figure 5: Output Power vs. Ambient Temperature
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Section II General Product Information
27.5
28.0
28.5
29.0
29.5
30.0
30.5
0 20 40 60 80 100 120 140 160 180
Output Voltage (V)
115Vrms L-L:
Connuous Operaon Region
Maximum Transient Duty and On-Time
208Vrms L-L:
Transient Operaon Regions
2s 20%
120s 50%
15s 20%
Output Load (A)
Figure 6: 28Vout Droop Characteristics
Output Load (A)
Figure 7 : 30Vout Droop Characteristics
29.0
29.5
30.0
30.5
31.0
31.5
32.0
32.5
33.0
0 20 40 60 80 100 120 140 160
Output Voltage (V)
115Vrms L-L:
Connuous Operaon Region
Maximum Transient Duty and On-Time
208Vrms L-L:
Transient Operaon Regions
2s 20%
120s 50%
15s 20%
Output Load (A)
Figure 8: 48Vout Droop Characteristics
48.0
48.5
49.0
49.5
50.0
50.5
51.0
51.5
52.0
0 10 20 30 40 50 60 70 80 90 100
Output Voltage (V)
115Vrms L-L:
Connuous Operaon Region
Maximum Transient Duty and On-Time
208Vrms L-L:
Transient Operaon Regions
2s 20%
120s 50%
15s 20%
MPS Droop Characteriscs - All Ouput Voltages
The MPS output voltage is semi-regulated. As the output current increases, the output voltage will decrease. Typically, the output voltage will decrease by 10% at full load.
Note that the full rated output power of 4000 W can be derived from the AC INPUT having a
voltage within this uncommon range for up to 15 seconds before the MPS will shutdown its output. Also note that the MPS can drive at full rated power for a 2 second interval even if
the AC INPUT voltage drops below 100 Vrms
L-L
.
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Section II General Product Information
0
20
40
60
80
100
120
0 10 20 30 40 50 60 70 80 90 100 110
Vout (% Vset)
Iout (% Imax)
MPPS Overload Characteriscs
Unlike the MPS which has a semi-regulated output voltage, the MPPS output voltage is fully regulated.
The output voltage is determined by the user programmed value of Vset, and the maximum output current is determined by the user programmed value of Imax. In the gure below, the axis values of Vout and Iout are %Vset and %Imax respecvely. This shows that the
MPPS will be able to maintain the programmed output voltage as long as the output current is less than 95% of the programmed current. If Iout exceeds 95% of Imax, the output voltage
will be reduced according to Figure 9. This is referred to as “Voltage Foldback”.
As an example, consider a MPPS with Vset = 30V, Imax = 50A. The MPPS will hold Vout at 30V as long as Iout is less than 47.5A (95% of Imax). Between 47.5A and 50A, the MPPS will reduce the output voltage to 0V. While at 0V the MPPS will limit the output current to Imax, in this case 50A. The output voltage will return to 30V once the load has been reduced
below 47.5A.
Figure 9: Voltage Fold Back During Current Limit, Short Circuit
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Section II General Product Information
PowerCableWiringDiagram
Looking at the rear panel, the MPS and MPPS connector terminals have the following funcons and locaons:
AC INPUT
Pin Funcon A,B Line1 C,D Line2
E,F Line3
G,H Ground
DC OUTPUT
Key Funcon
A -V
D E
B
FC
H
G
A
A
DC OUTPUT
Key Funcon
B +V
B
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Section III Operation
Set-Up
The recommended procedure for seng up the MPS or MPPS is the following:
• Make sure the AC BREAKER on the rear panel of the MPS or MPPS is in the OFF posion.
• The AC breaker on the rear panel is classied as a supplementary protector and is not designed for branch circuit protecon. A suitable circuit breaker should be added externally for the AC input if branch circuit protecon is required.
• Connect the ground wire to the ground stud on the rear panel of the MPS or MPPS.
• Connect the DC OUTPUT cables, rst to the MPS or MPPS and then to the load with the
correct polarity.
• Connect the USER I/O cables.
• Connect the INPUT cables, rst to the MPS or MPPS and then to the AC source.
• Turn on the source (if they have an up stream breaker).
• Move the AC BREAKER on the rear panel of the MPS or MPPS to the ON posion.
Start-Up
• VERIFY that all connecons to the MPS or MPPS are correct.
• If the AC source is present and within specicaons, the three POWER IN LEDs on the front
panel will be green.
• Momentarily push the ON/OFF switch on the front panel of the MPS or MPPS upward. The
switch can then be released and it will return to its normal (neutral) posion.
Shut-Down
• Shut down the equipment connected to the MPS or MPPS.
• Push the ON/OFF switch on the front panel of the MPS or MPPS downward and hold it
in this posion for 1 second (or more). The switch can then be released to return to its normal posion.
• The MPS or MPPS will disable its outputs.
• It is not necessary to move the AC BREAKER on the rear panel of the MPS or MPPS to the OFF posion.
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Section III Operation
Power Cable Connecons
Forsafetyreasons,the input and output power cables should be connected to the MPS or MPPS before the source of AC power is turned on, and before the MPS or MPPS is turned on (see SeconI:Warningsand the SET-UPsecon above). Similarly, one should rst turn o the MPS or MPPS and the source of input power before any power cables are disconnected from the MPS or MPPS .
ALSO NOTE that when the MPS or MPPS is turned on and delivering power to a load, and then
another piece of equipment is connected to the same output, it is possible that this connecon
will momentarily disrupt the quality of the MPS or MPPS’s output voltage.
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Section III Operation
Programming The Output: MPPS Only
For the MPPS, the output voltage and output current can be programmed using the RS‑232
interface or using the web page interface. The MPPS cannot be programmed using the SNMP interface.
Programming the Output From the Web Interface
• Ensure the web interface is congured properly. See the Ethernet/SNMP user guide for
details: http://www.synqor.com/mps/documents/MPS_Ethernet_SNMP_UG.pdf
• Navigate to the “control” tab. The default address is hp://169.254.1.1/control.htm
• In the “Conguraon” secon, enter the desired output voltage in mV click UPDATE. For example “30000” corresponds to 30.000V output.
• In the “Conguraon” secon, enter the desired output current in amps click UPDATE. For example, “50” corresponds to 50A.
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Section III Operation
Programming the Output From the RS-232 Interface
• Ensure RS‑232 interface is congured properly. RS‑232 must be congured with 115.2kbaud, 8 data bits, no parity, and one stop bit.
• Output voltage and current can be set with “SET VOUT x” and “SET IMAX” commands. “SET VOUT x” will set the output voltage level in millivolts. “SET IMAX x” will set the maximum current level in amps. See the “MPS User Commands” document for details:
http://www.synqor.com/MPS/documents/MPS_User_Commands.pdf
• In the example below, “SET VOUT 30000” sets the output voltage to 30.000V. “SET IMAX 50” sets the maximum current to 50A
SynQor>SET VOUT 30000
DAC Set. Flash Updated.
SynQor>SET IMAX 50
DAC Set. Flash Updated.
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Section III Operation
Cooling System
The SynQor MPS-4000 & MPPS-4000 Series products are cooled by fans that draw air into the intake on the front panel and exhaust it out the two fan ports on the rear panel. Care should
be taken to ensure there is no obstrucon to this airow, either at the front intake or the rear exhaust ports. Similarly, care should be taken to avoid obstrucng the fan blades.
The speed of the cooling fans is automacally controlled to provide adequate MPS or MPPS
cooling while extending the life of the fan bearings. Under low ambient temperature and/ or low MPS or MPPS output power the fans will be driven at a low speed. If the ambient temperature and output power are such that the MPS or MPPS cannot otherwise maintain its
specied maximum temperature for its internal circuitry, the fans will momentarily be driven
at a speed that exceeds their rated long-term running speed.
If the ambient temperature is low enough (for the level of power being delivered to the load), the fans may not be on. This is not a malfuncon. It is done to preserve the life of the fans. If the fans are o, check the Fan Service Required LED on the front panel of the baery pack. If it is GREEN, the fans are funconing properly and simply not needed under the present condions.
The fans are weather-proof and water-proof.
The MPS or MPPS has two fans to provide redundancy for these exposed, moving components.
With only a single operang fan the MPS or MPPS is sll able to deliver 80% rated power at
an ambient temperature of 40°C, and it is able to deliver 60% of its rated power at an ambient temperature as high as 55°C.
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Section III Operation
Front Panel Indicators
To indicate the status of the MPS or MPPS there are 16 LEDs on the front panel. These indicators
are described in this secon.
LEDs
Each Unit has 16 LEDs, as shown below, that indicate the status of the operaon of the Unit:
A0 A1 B0 B1 B2 B3 C0 P0
D0 D1 D2 E0 E1 E2 F0 P1
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Section III Operation
• Power-InIndicators(LEDsinposionsD0,D1andD2)
The LEDs D0, D1, and D2 indicate the status of input phases A, B and C: Status is monitored on a line to line basis:
LED Appearance Description Indication
Green
Amber
Red
Off
Input is Ready to Provide Load Power
Input is Not within Range
Input is Not Present
Unit is Off
• Power-OutIndicators(LEDsinposionsA0andA1)
The LED in posion A0 indicates the status of the Auxiliary DC OUTPUT and the LED in posion A1 indicates
the status of the Main DC OUTPUT, according to the table below:
LED Appearance Description Indication
Green
Amber
Red
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Off
Unit is On and the Output Voltage is
Within Range
Unit is On but the Output Voltage is
Out of Range
Unit is Off and the Output Voltage is Within Range
Unit is Off
(Or the Auxiliary DC Output Option is not Installed)
Section III Operation
• LoadPowerIndicators(LEDsinposionsB0–B3)
The LEDs in posions B0 through B3 indicate the total output power of the Unit according to the table:
LED Appearance Description Indication
B0 Dimmed Green;B1-B3 Off Total Load Power <25%
B0 Green; B1 Dimmed Green; B2-B3 Off Total Load Power <50%
B0, B1 Green;
B2 Dimmed Green; B3 Off
B0, B1, B2 Green;
B3 Dimmed Green
B0; B1; B2 Green;
B3 Blinking Red
Total Load Power <75%
Total Load Power <100%
Total Load Power ≥100%
• MPSorMPPSCoolingSystemIndicator(LEDinposionC0)
The LED in posion C0 indicates the temperature and status of the cooling system for the Unit according
to the table below:
LED Appearance Description Indication
Green
Moderate Temperature
(Fans Running at 33%)
Blinking Green
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Amber
Red
Warm Temperature
(Fans Running at 67%)
Elevated Temperature
(Fans Running at 100%)
Maximum Temperature
(Fans Running at 110%)
Section III Operation
• FanServiceRequiredIndicator(LEDinposionF0)
The LED in posion F0 indicates whether the two cooling fans in the rear panel of the Unit are OK or if
their performance is degraded, according to the table below:
LED Appearance Description Indication
Green
Amber
Red
One or Both Fans Have Recently Had Degraded Performance
and Diagnostic Tests are Being Performed
One or Both Fans Presently Have Degraded Performance
Both Fans are OK
• ControlStatus(LEDinposionE0,E1,E2)
The LED in posion E0, E1 or E2 indicates whether RS232 or Ethernet Port, Remote Enable/Shutdown or Bale Short are acve:
LED Appearance Description Indication
Green
E0: RS232 active or Ethernet Port Active,
E1: Remote Enable Active
Blinking Red
• Reserved(LEDinposionP0&P1)
This secon of the LED panel has been reserved for future use.
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Red
E2: Battle Short Mode Active,
Temperature Shutdowns Removed
E1: Remote Shutdown Active
Section III Operation
Operang Environment
The SynQor MPS‑4000 and MPPS‑4000 Series is designed for the extreme environmental condions of military and aerospace applicaons. All the electronic circuitry is contained in a sealed, weather‑proof,
shock-proof chamber constructed of die-cast aluminum. Only the redundant, water-proof cooling fans
are exposed to the environment. The Unit will shut down if it is too hot and Bale Mode is not acve.
The MPS and MPPS (with cables connected or connector covers installed) has been qualied to the following requirements of MIL‑STD‑810G:
MIL-STD-810G
Test Method
500.5 Low Pressure I, II and III
501.5 High Temperature I and II
502.5 Low Temperature I and II
503.5 Temperature Shock I ▪ 10 cycles; >10oC/minute
506.5 Rain I
507.5 Humidity NA ▪ >95%
508.6 Fungus NA ▪ 28 day test
509.5 Salt Fog NA
510.5 Sand and Dust I and II
514.6 Vibraon Category 5
Name Procedure Details
▪ 15,000 . operang ▪ 40,000 . storage
▪ +55oC operang ▪ +65oC storage
▪ -20oC operang ▪ -20oC storage
▪ 4” rain/hour ▪ 40 mph wind velocity
▪ 5% salt soluon ▪ 2 cycles (24 hr wet/24 hr dry)
▪ 20 mph blowing dust ▪ 40 mph blowing sand
▪ 5 Hz (300 RPM) ▪ Loose Cargo
514.6 Vibraon Category 7 ▪ General Exposure
514.6 Vibraon Category 8 ▪ C‑130 Aircra level
514.6 Vibraon Category 9 ▪ General Exposure
514.6 Vibraon Category 24
516.6 Shock I, IV and VI
528
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Mechanical Vibraons of
Shipboard Equipment
▪ PSD = 0.4 g2/Hz; 1‑2000 Hz ▪ Operang
▪ 20 g/20 ms; 40 g/11 ms; 75 g/6 ms ▪ 48 inch drop in transit case ▪ 30 degree lt and drop
I ▪ Operang
Section IV Control Interface Details
Control Cable Connecons
There are two high‑density (three‑row) DB15 connectors located on the rear panel of the MPS
or MPPS:
The User I/O female DB15 connector on the le is for an oponal connecon to a host/system computer so that it can control the MPS or MPPS and receive informaon regarding the status
of the MPS or MPPS.
The Conguraon male DB15 connector on the right provides for synchronized startup and shutdown operaon of Mulple Interconnected Units, using the SYN‑9322 or SYN‑9323 cable. For MPPS Units, the Conguraon connector also provides acve current sharing. See descripon “Synchronized Operaon of Mulple Units” on page 38.
The designaon/locaon of the pins for the User I/O female high‑density DB15 connector is
shown below:
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Section IV Control Interface Details
Internal User I/O Circuits
+5V
50k Ohms
2N3904
I/O Circuits
PS2581L
+5V
+5V
1N4148
1N4148
100 Ohms
500 Ohms
1N4148
50k Ohms
7, 14, 15
4, 5
8
12, 13
6 Input PinTTL
Output Pin
Signal Common Pin
+5V Pin
Input Pin
User I/O Rear Panel Connector 15 Pin DSUB Female
Remote On/O Switch Connecons
+5V
100 Ohms
I/O Circuits
500 Ohms
PS2581L
1N4148
500 Ohms
PS2581L
1N4148
Note: A 2PDT or 3PDT switch may be substuted for single control of 2 or 3 MPS or MPPS machines, respecvely.
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8
+5V Pin
12
REMOTE_START
Input Pin
13
SHUTDOWN
Input Pin
OUTPUT ON
OUTPUT OFF
Remote On/O Switch
SPDT Momentary
(ON) OFF (ON)
Section IV Control Interface Details
Digital Input/Output Control Signals
There are 3 input and 4 output digital signals available on the User I/O female high-density
DB15 connector. The pin assignments and funcons of these digital I/O signals are as follows:
High Density DB15 Female (15 Pin Connector)
Signal PIN Function
TX 2 RS232 DCE Device Transmit
RX 3 RS232 DCE Device Receive
GND 4, 5 Ground reference for all digital inputs and outputs
BATTLE_MODE
ACIN_GOOD
+5 V 8
REMOTE_START 12 Drive this line “high” with ≥5 mA to enable the output
SHUTDOWN 13 Drive this line “high” with ≥5 mA to disable the output
OUT_OK
OVER_TEMP
TTL-Input*, pull “low” to engage Battle Mode (disable internal over-temperature protection),
6
has internal pull-up to +5 V.
7 Open collector* output where “low” indicates AC Input voltage is within range
Vout with minimal current drive usable as a pull-up voltage for open collector output signals.
Load must be <35 mA
14 Open collector* output where “low” indicates Main DC Output voltage is within range
15 Open collector* output where “low” indicates that the MPS/MPPS is at or above its maximum temperature
*With an internal 50 k Pull-up Resistor to 5 V and ESD Protection Diodes.
Bale Mode disables internal over‑temperature shutdown limits in the MPS or MPPS hardware. Bale Mode is indicated with a ashing red light in panel posion E2. This mode
can be commanded by pulling low on to I/O Port Pin 6, or via serial command BS ON.
RS232 Serial Interface
The same User I/O female high‑density DB15 connector also provides for an RS232 interface
between the MPS /MPPS and the host/system computer. The interface has a 115.2 k baud
with eight data bits, no parity bit and one stop bit. The pin assignments and funcons for this RS2332 interface are as follows:
Signal Pin Number Function
GND 4 and 5 Ground reference for RX and TX signals
RX 3 RS232 DCE/MPS or MPPS Device Receive signal
TX 2 RS232 DCE/MPS or MPPS Device Transmit signal
The RS232 port provides readback of Units’s state, as well as the conguraon and control of the MPS/MPPS’s operaon. The port can be used from a standard terminal interface, or from a custom computer applicaon. For MPPS Units, this port can be used to program the output
voltage, and the output current.
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Section IV Control Interface Details
Readback informaon that is available:
• Programmed Vset (MPPS only)
• Programmed Iset (MPPS only)
• Bale Mode
• Fan diagnoscs
• Fault Shutdown Synchronizaon Control
• On/O Synchronizaon
• Output enable / disable
Parameters that are controllable through the interface:
• Vset (MPPS only)
• Iset (MPPS only)
• AC Input Voltage
• AC Input Current
• AC Input Frequency
• DC Output Power
• External Switch Input Status
• Fan RPM
• Internal Temperatures
• Total Output Power
For a detailed descripon of the terminal interface see the SynQor website at:
http://www.SynQor.com/MPS/documents/MPS_User_Commands.pdf
Ethernet Interface
The oponal Ethernet interface provides a web page based user interface for monitoring and
control of the MPS. For MPPS Units, the user can set the output voltage and output current with
the Ethernet interface. The interface also exposes an SNMP interface compliant to RFC‑1628.
The Ethernet interface supports 10BASE‑T and 100BASE‑T standards. It ulizes a standard RJ‑ 45
connector, also allowing a metallic sealable circular military outer housing. The interface supports
auto‑negoaon, polarity correcon, and Auto‑MDIX (detecon and use of straight through or
cross-over cables).
IP address assignment can be done via DHCP or user entry of a stac address. The interface also supports a direct connecon between the MPS/MPPS and a host computer by including a DHCP
server internal to the MPS/MPPS.
For a detailed descripon of the Ethernet port and SNMP implementaon see the SynQor
website at: http://www.synqor.com/MPS/documents/MPS_Ethernet_SNMP_UG.pdf
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Section IV Control Interface Details
Synchronized Operaon of Mulple Units: MPS
Interconnecng Mulple Units via the Conguraon port using cable SYN‑9322 or SYN‑9323
enables synchronized start-up, shutdown, restart, and fault behavior of connected Units.
Turn-On, Turn-O, Restart Control:
When an MPS device is in the Standby Mode (input power applied but output not enabled),
and its output is enabled via the front panel switch, remote enable input, or serial command, all other MPS devices that are also in the Standby Mode will enable their outputs at the same
me. Likewise, when a Unit is operang and its output is running, if its output is disabled via
the front panel switch, remote shutdown input, or serial command, all other MPS devices that
are also operang will disable their outputs at the same me. Finally, when an MPS restarts aer a fault event, it will coordinate its restart to be simultaneous with other MPS devices restarng during the same interval. These features are enabled by default when the SYN‑9322 or SYN‑9323 cable is ulized to interconnect mulple MPS devices. The features can be disabled via the serial interface using the SYNCCON OFF command, and this seng is stored in non‑ volale memory. These features can also be disabled via the web interface.
Fault Synchronizaon Control:
When an MPS device is operang, and the output shuts down due to a load fault, such as a short circuit, the Fault Synchronizaon Control will cause other MPS devices interconnected via the SYN‑9322 or SYN‑9323 cable to shutdown at the same me. This feature is disabled by default. It can be enabled via the serial interface by issuing the command, and the seng is stored in non‑volale memory. The feature can also be enabled via the web interface.
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Section IV Control Interface Details
Parallel Operaon of Mulple Units: MPPS
Interconnecng Mulple Units via the Conguraon port using cable SYN‑9322 or SYN‑9323
enables synchronized start-up, shutdown, and current sharing of connected Units.
Turn-On, Turn-O, Restart Control:
When an MPPS device is in the Standby Mode (input power applied but output not enabled),
and its output is enabled via the front panel switch, remote enable input, or serial command, all other MPPS devices that are also in the Standby Mode will enable their outputs at the same
me. Likewise, when a Unit is operang and its output is running, if its output is disabled via
the front panel switch, remote shutdown input, or serial command, all other MPPS devices
that are also operang will disable their outputs at the same me. These features are enabled by default when the SYN‑9322 or SYN‑9323 cable is ulized to interconnect mulple MPPS
devices. The features can be disabled via the serial interface using the SYNCCON OFF command,
and this seng is stored in non‑volale memory. These features can also be disabled via the
web interface.
Parallel Operaon, Current sharing:
When Parallel operaon has the following requirements and characteriscs:
- Configuration cable SYN-9322 or SYN-9323 must be used to parallel two or three Units respectively
‑ All MPPS Units must have the same programmed Vset value.
- MPPS Units will share to ±3A of the average output current at full load.
- Ideal diode on the output of the MPPS prevents circulating currents.
When MPPS Units are placed in parallel, a digital current sharing algorithm adjusts the output
voltage of each MPPS slightly to ensure each Unit is delivering approximately the same amount
of current. If the MPPS Units have dierent programmed values for Vset, the current share
algorithm will not run. This will not cause damage to the MPPS Units, however it is very likely they will not share current evently. Output cables should be constructed so the output resistance is approximately equal for each MPPS Unit.
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Section V Maintenance
Section V Maintenance
Fans
The fans on the rear panel have sealed bearings that do not require any regular maintenance. Fan assemblies are user replaceable with kits available from SynQor. Please contact the SynQor factory for obtaining fan replacement kits.
Cleaning
The MPS/MPPS Unit has a sealed chamber for its electronics that is weather-proof. Only the fans on the rear panel are exposed to the environment, and these fans are also weather-proof.
The Unit can therefore be cleaned without concern of geng liquids inside the chamber.
NOTE, however, that if the cables have been removed from the connectors the connectors should have their covers installed. If they are not, then care should be taken to not get excess liquid on the connector terminals. ALSONOTE that care should be taken to not get excess
liquid on the switch of the AC BREAKER on the back panel.
Cleaning should be done either with soap and water or with an Isopropyl alcohol and water
mixture. A so cloth should be used.
Do not immerse the Unit in water to clean it.
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Section VI Trouble-Shooting Guide
Fault Condions
The SynQor MPS/MPPS has no user-serviceable parts within it other than the cooling fans. If
it has an internal malfuncon only factory trained personnel should aempt to repair it.
There are, however, several external condions that could cause the MPS/MPPS to not operate as desired. These external condions can likely be corrected by the user.
The 16 LEDs on the front panel are the best and rst place to look to determine what might
be wrong with the Unit. The table on the next several pages is therefore organized by what
these LEDs indicate, and for each indicaon there is a lisng of what might possibly be wrong.
The front panel LED array is shown below. The designaons of the 16 LEDs in this array are
used in the following table.
A0 A1 B0 B1 B2 B3 C0 P0
D0 D1 D2 E0 E1 E2 F0 P1
LED Indication Possible Problem(s)
• The AC INPUT power source is not turned on.
D0, D1, D2:
ACINPUT PowerLED
LED is OFF
LED is AMBER • The AC INPUT voltage is either too low or too high.
LED is RED • The AC INPUT voltage is missing at least one phase on its source.
LED is OFF
• The AC INPUT cable is not connected or it is wired wrong.
• The AC Breaker on the rear panel is OFF.
• The MPS/MPPS Unit is OFF and needs to be turned ON.
• The oponal auxillary DC OUTPUT is not available on the Unit. (A0)
• The Unit is OFF and needs to be turned ON.
A0,A1:
DCOUTPUT PowerLED
006-0006715 10/31/18 Rev J 41 of 44 MPS-MPPS-4000 Guide www.synqor.com
LED is AMBER
LED is RED
• The DC OUTPUT load is too high.
• The DC OUTPUT is shorted within the cable or a load.
• Some other source of power is connected to the DC OUTPUT.
• The Unit has been turned OFF, but due to a malfuncon within the
Unit it is sll running and providing an DC OUTPUT voltage.
• Some other source of voltage is connected to the DC OUTPUT and is powering it when the Unit is disabled.
Section VI Trouble-Shooting Guide
LED Indication Possible Problem(s)
• Total load power is greater than or approaching 4000 W. The Unit
B3 is BLINKING RED
B0–B3:
LOADPOWER LEDs
B0 – B3 are all OFF
may sll be delivering its specied output voltage because the load
power is not high enough to trigger the power limit circuitry.
• No power is being delivered to the load.
• The Unit is OFF and needs to be turned ON.
• The loads or output cables are not connected.
• The loads are all turned o.
• The loads are simply not drawing any appreciable power at the me.
C0:
Cooling SystemLED
F0:
FanService RequiredLED
AllLEDs:
LED is BLINKING GREEN
LED is AMBER
LED is RED
LED is AMBER
LED is RED
All LEDs are OFF
• Indicates that the fans are running at 67% of their rated speed.
There is no problem.
• Indicates that the fans are running at 100% of their rated speed.
There is no problem, but the Unit is operang at a high ambient temperature and a high load combinaon.
• Fans are running at 110% of rated speed to keep the Unit cool. The
maximum recommended temperature may be exceeded, but the fans are keeping things cool enough to avoid triggering the over­temperature shut-down circuitry.
• One or both fans have recently had degraded performance but seem
to be ok now. The Unit is running a diagnosc test.
• One or both fans presently have degraded performance, even
if they are running, and service is recommended at the earliest
convenient me.
• Ensure that the fan blades are not obstructed from turning
• The Unit is OFF and needs to be turned ON.
• The AC INPUT power is not turned ON.
• The AC Breaker on the rear panel is OFF.
006-0006715 10/31/18 Rev J 42 of 44 MPS-MPPS-4000 Guide www.synqor.com
Section VI Trouble-Shooting Guide
Three other condions should be menoned:
• The fans are off when the MPS/MPPS Unit is running
It is normal for the fans to be o, even if the Unit is running and delivering power to the load, as long as the temperature of the Unit is low enough. If the Fan Service Required LED (F0) is green, both of the fans are OK, even if they are not running.
•The MPS/MPPS Unit does not turn off when the ON/OFF switch is pushed down
When the ON/OFF switch on the front panel is pushed down, the Unit does not respond to this
signal for approximately 1 second. This is done to ensure that the Unit is not accidently turned
o. If the user does not hold the ON/OFF switch in the OFF posion for a full second before releasing it, the Unit will not turn o.
•MPPS Units do not share current evenly
MPPS Units must have the exact same programmed output voltage in order to share properly.
The acve current sharing algorithm will not aempt to share with Units that have a dierent
programmed output voltage.
Consider two Units in parallel. If one is set to 28000 mV and the other is set to 28001 mV, the acve current sharing algorithm will not run.
Other possible situaons that are the result of external issues that a user could likely correct are related to:
•Loads that draw a large surge of current at start-up
Some loads draw a very large amount of current when an input voltage is rst applied to them. This might happen when the Unit is rst turned on if the load is already connected to the Unit.
Or it may happen when the load itself is turned on and/or connected to the DC OUTPUT of a Unit that is already running. Common examples of such loads are motors and incandescent
lights, but some electronic equipment can also display this characterisc.
Several problems could arise with such a load:
▪ A newly started load disturbs the exisng Unit loads.
If this disrupon of exisng loads is a problem, then the soluon is to make sure the loads that display this start‑up surge characterisc are all started rst, or that all loads are started at the same me.
006-0006715 10/31/18 Rev J 43 of 44 MPS-MPPS-4000 Guide www.synqor.com
Military Field-Grade Power SuPPly
Operator’s Guide
MPS-4000 Series & MPPS-4000 Series
Made in USA
1.888.567.9596 (USA only) | SynQor Headquarters 155 Swanson Road, Boxborough, MA 01719-1316 USA | www.synqor.com
006-0006715 10/31/18 Rev J
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