Delta PMT Series Instruction Manual

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
1
PMT
Highlights & Features
•AC input voltage range selectable by switch
•Full aluminium casing for light weight and corrosion resistant
handling
•Built-in automatic fan speed control circuit
•MTBF > 700,000 hrs as per Telcordia SR-332
•Short Circuit / Overvoltage / Overload / Over Temperature
Protections
Safety Standards
CB Certified for worldwide use
Model Number: PMT-48V350W1A☐☐
Unit Weight: 0.83 kg (1.83 lb)
Dimensions (L x W x D): 215 x 115 x 50 mm
(8.46 x 4.53 x 1.97 inch)
General Description
The new PMT series of panel mount power supplies is the latest offering from one of the world’s largest power supply manufacturers and
solution providers - Delta. PMT-48V350W1A☐☐ offers a nominal output voltage of 48V with a wide operating temperature range from -
10°C to +70°C and can withstand shock and vibration (in accordance to IEC 60068-2-27 and IEC 60068-2-6 respectively). In addition to
features like overvoltage and overload protections, Delta’s PMT series of panel mount power supplies is unlike many other brands in the
same price level. The PMT series is designed for cost competitive markets without compromising the quality of the components and
product specifications. The series of products has an expected life time of 10 years and will have no output power de-rating from 100Vac
to 132Vac & 200Vac to 264Vac.
Model Information
PMT Panel Mount Power Supply
Model
Number Input Voltage Range Rated Output V oltage Rated Output Curr ent
PMT-48V350W1A☐☐ 90-132Vac, 180-264Vac
(Selectable by Switch)
48Vdc 7.30A
Model Numbering
CC Code**
PM T –48V 350W 1A
□
□
Panel Mount Product Type
T – Enclosed
Output Voltage Output Power Single Phase No PFC Connector Type
R – Terminal Block
K – Front Face*
Blank – Without
connector cover
A – With
connector cover
*Options
**For Terminal Block Type
R K*

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
2
Specifications
Input Ratings / Characteristics
Nominal Input Voltage 100-120Vac, 200-240Vac (Selectable by Switch)
Input Voltage Range 90-132Vac, 180-264Vac (Selectable by Switch)
Nominal Input Frequency 50-60Hz
Input Frequency Range 47-63Hz
Input Current 7.00A typ. @ 115Vac, 4.00A typ. @ 230Vac
Efficiency at 100% Load 87.5% typ. @ 230Vac
Max Inrush Current (Cold Start) 40A typ. @ 115Vac, 60A typ. @ 230Vac
Leakage Current < 3.5mA @ 240Vac
Output Ratings / Characteristics*
Nominal Output Voltage 48Vdc
Factory Set Point Tolerance 48Vdc ± 1%
Output Voltage Adjustment Range 43.2-52.8Vdc
Output Current 7.30A (350W max.)
Output Power 350W
Line Regulation ± 0.5% typ.
Load Regulation ± 1% typ.
PARD** (20MHz) < 240mVpp
Rise Time < 50ms @ nominal input (100% load)
Start-up Time < 1000ms @ nominal input (100% load)
Hold-up Time 16ms typ. @ 115Vac, 20ms typ. @ 230Vac (100% load)
Dynamic Response (Overshoot & Undershoot O/P Voltage) ± 5% @ 10-50% load and 50-100% load
Start-up with Capacitive Loads 8,000µF Max
*For power de-rating from > 50°C to 70°C, see power de-rating on page 3.
**PARD is measured with an AC coupling mode, 5cm wires, and in parallel with 0.1µF ceramic capacitor & 47µF electrolytic capacitor.
Mechanical
Case Cover / Chassis Aluminium
Dimensions (L x W x D) 215 x 115 x 50 mm (8.46 x 4.53 x 1.97 inch)
Unit Weight 0.83 kg (1.83 lb)
Indicator Green LED (DC OK)
Cooling System Forced Cooling
Terminal
PMT-48V350W1AR
☐
M3.5 x 9 Pins (Rated 300V/15A)
PMT-48V350W1AK M3.5 x 9 Pins (Rated 300V/20A)
Wire AWG 22-12
Noise (1 Meter from power supply) Sound Pressure Level (SPL) < 52dBA

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
3
Environment
Surrounding Air Temperature
Operating
-10°C to +70°C
Storage -25°C to +85°C
Power De-rating > 50°C de-rate power by 2.5% / °C
< 100Vac de-rate power by 3% / V
< 200Vac de-rate power by 3% / V
Operating Humidity 5 to 95% RH (Non-Condensing)
Operating Altitude 0 to 5,000 Meters (16,400 ft.)
Shock Test Non-Operating IEC 60068-2-27, Half Sine: 50G for a duration of 11ms, 3
times per direction, 18 times in total
Vibration Operating IEC 60068-2-6, Sine Wave: 10Hz to 150Hz @ 25m/S² (2.5G
peak); 90 min per axis for all X, Y, Z direction
Non-Operating IEC 60068-2-6, Random: 5Hz to 500Hz @ 2.09Grms peak;
20 min per axis for all X, Y, Z direction
Over Voltage Category II
Pollution Degree 2
Protections
Overvoltage 57.6V~67.2V, Latch Mode
Overload / Overcurrent 105%~150% of rated load current, Hiccup Mode,
Non-Latching (Auto-Recovery)
Over Temperature Hiccup Mode, Non-Latching
(Auto-Recovery when the fault is removed)
Short Circuit Hiccup Mode, Non-Latching
(Auto-Recovery when the fault is removed)
Internal Fuse at L pin T10AH
Protection Against Shock Class I with PE* connection
*PE: Primary Earth
Reliability Data
MTBF > 700,000 hrs as per Telcordia SR-332
I/P: 100Vac, O/P: 100% load, Ta: 35°C
Expected Cap Life Time 10 years (115Vac & 230Vac, 50% load @ 40°C)

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
4
Safety Standards / Directives
Safety Entry Low Voltage
SELV (EN 60950-1)
Electrical Safety TUV Bauart
UL/cUL recognized
CB scheme
EN 60950-1
UL 60950-1 and CSA C22.2 No. 60950-1 (File No. E131881)
IEC 60950-1
CE In conformance with EMC Directive 2014/30/EU and Low
Voltage Directive 2014/35/EU
Material and Parts RoHS Directive 2011/65/EU Compliant
Galvanic Isolation Input to Output 3.0KVac
Input to Ground 1.5KVac
Output to Ground 0.5KVac
EMC
Emissions
(CE & RE) CISPR 32, EN 55032, EN 55011, FCC Title 47: Class B
Immunity EN 55024
Electrostatic Discharge IEC 61000-4-2 Level 4 Criteria A1)
Air Discharge: 15kV
Contact Discharge: 8kV
Radiated Field IEC 61000-4-3 Level 3 Criteria A1)
80MHz-1GHz, 10V/M with 1kHz tone / 80% modulation
Electrical Fast Transient / Burst IEC 61000-4-4 Level 3 Criteria A1)
2kV
Surge IEC 61000-4-5 Level 3 Criteria A1)
Common Mode2): 2kV
Differential Mode
3)
: 1kV
Conducted IEC 61000-4-6 Level 3 Criteria A1)
150kHz-80MHz, 10Vrms
Power Frequency Magnetic Fields IEC 61000-4-8 Criteria A1)
10A/Meter
Voltage Dips and Interruptions IEC 61000-4-11 100% dip; 1 cycle (20ms); Self Recoverable
Low Energy Pulse Test (Ring Wave) IEC 61000-4-12 Level 3 Criteria A1)
Common Mode2): 2kV
Differential Mode
3)
: 1kV
Harmonic Current Emission NA
Voltage Fluctuation and Flicker* IEC/EN 61000-3-3
*Fulfills tested conditions
1) Criteria A: Normal performance within the specification limits
2) Asymmetrical: Common mode (Line to earth)
3) Symmetrical: Differential mode (Line to line)

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
5
Block Diagram
Device Description
1) Input & Output terminal block connector
2) DC voltage adjustment potentiometer
3) DC OK control LED (Green)
4) AC selectable switch
PMT-48V350W1AR: Terminal Block
PMT-48V350W1AK: Front Face

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
6
Dimensions
PMT-48V350W1AR: Terminal Block
L x W x D: 215 x 115 x 50 mm (8.46 x 4.53 x 1.97 inch)

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
7
PMT-48V350W1AK: Front Face
L x W x D: 215 x 115 x 50 mm (8.46 x 4.53 x 1.97 inch)

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
8
Engineering Data
Output Load De-rating VS Surrounding Air Temperature
Output De-rating VS. Input Voltage
Note
1. Power supply components may degrade, or
be damaged, when the power supply is
continuously used outside the shaded region,
refer to the graph shown in Fig. 1.
2. If the output capacity is not reduced when the
surrounding air temperature
exceeds its
specification as defined on Page 3 under
“Environment”, the device will run into Over
Temperature Protection. When activated, the
output voltage will go into bouncing mode and
will recover
when the surrounding air
temperature is lowered or the load is reduced
as far as necessary to keep the device in
working condition.
3. In order for the device to function in the
manner intended, it is also necessary to keep
a safety distance of ≥ 20mm (0.78 inch) with
adjacent units while the device is in operation.
4. Depending on the surrounding air temperature
and output load delivered b
y the power
supply, the device can be very hot!
5. If the device has to be mounted in any other
orientation, please contact
[email protected]om for more details.
Fig. 1 De-rating for Vertical and Horizontal Mounting Orientation
> 50°C de-rate power by 2.5% / °C
No output power de-rating for the input
voltage from 100Vac to 132Vac & 200Vac to
264Vac
■L Frame / Enclosed

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
9
Assembly & Installation
ⒶSide Mounting: Fig. 2 and Fig. 3 show the mounting hole locations for power supply assembly onto a metal mounting surface. The
power supply shall be mounted on minimum of 4 mounting holes using M4 screw maximum 5mm (0.20 inch) length (Refer to Fig.
4). This is to maintain a safety distance between the screw and internal components.
ⒷBase Mounting: Fig. 2 and Fig. 3 show the mounting hole locations for power supply assembly onto a metal mounting surface. The
power supply shall be mounted on minimum of 4 mounting holes using M4 screw maximum 4mm (0.16 inch) length (Refer to Fig.
4).
ⒸConnector
ⒹThis surface belongs to customer’s end system or panel where the power supply is mounted.
Base Mounting (Horizontal) Base Mounting (Vertical) Side Mounting (Horizontal)
Fig. 2 Mounting Orientation
•Use flexible cable (stranded or solid) of AWG No. 22-12. The input/output connectors’ allowable current is 23A max per pin. User
should calculate and select the suitable wire specification (type/quantity/diameter) according to actual output current. The torque at
the connector shall not exceed 13Kgf.cm (11.23 lbf.in). The insulation stripping length should not exceed 0.275” or 7mm.
•Recommended mounting torque of the product and its mounting accessories is 9~12Kgf.cm (7.81~10.42 lbf.in).
Fig. 4 Assembly Reference
Only use M4 screw ≤ 5 mm (0.20 inch) through the base mounting holes
at Ⓐ.This is to keep a safe distance between the screw and internal
components.

Only use M4 screw ≤ 4 mm (0.16 inch) through the base mounting holes
at Ⓑ.
Fig. 3 Mounting Hole Locations and the Safety Distance
For safety reasons, please ensure the mounted device is kept at ≥ 4mm (0.16 inch) safety distance at all sides from other components
and equipments. In addition, to ensure sufficient convection cooling, always maintain a distance of ≥ 20mm (0.79 inch) from fan ventilated
surfaces while the device is in operation. Please insert an insulation sheet between the system and product, if the safety distance is <
4mm (0.16 inch).
Safety Distance
D1 = 4mm Min.
D2 = 20mm Min.

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
10
Safety Instructions
•Must select correct AC input voltage before turning on (Refer to the “Device Description” on Page 5).
•If user’s mounting orientation is not according to the recommended mounting orientations, please consult Delta for further
information.
•The device is not recommended to be placed on low thermal conductive surface. For example, plastics.
•The enclosure of the device can become very hot depending on the ambient temperature and load of the power supply. Do not
touch the device while it is in operation or immediately after power is turned OFF. Risk of burning!
•Do not touch the terminals while power is being supplied. Risk of electric shock.
•Prevent any foreign metal, particles or conductors from entering the device through the openings during installation.
It may cause: - Electric shock; Safety Hazard; Fire; Product failure.
•Warning: When connecting the device, secure Earth connection before connecting L and N. When disconnecting the device,
remove L and N connections before removing the Earth connection. The power supply must be mounted by metal screws onto a
grounded metal surface. It is highly recommended that the Earth terminal on the connector be connected to the grounded metal
surface.
Accessories
LM-01: Top Fixing Bracket
This bracket is used to fix the power supply onto a flat
surface from the top.
•
•

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
11
Functions
Start-up Time
The time required for the output voltage to reach 90% of its final steady state set value, after the input voltage is applied.
Rise Time
The time required for the output voltage to change from 10% to 90% of its final steady state set value.
Hold-up Time
Time between the collapse of the AC input voltage, and the output falling to 95% of its steady state set value.
■Graph illustrating the Start-up Time, Rise Time, and Hold-up Time
Inrush Current
Inrush current is the peak, instantaneous, input current measured
and, occurs when the input voltage is first applied. For AC input
voltages, the maximum peak value of inrush current will occur
during the first half cycle of the applied AC voltage. This peak value
decreases exponentially during subsequent cycles of AC voltage.
Dynamic Response
The power supply output voltage will remain within ±5 of its steady
state value, when subjected to a dynamic load from 10 to 50% and
50 to 100% of its rated current.

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
12
Overload & Overcurrent Protections (Auto-Recovery)
The power supply’s Overload (OLP) and Overcurrent (OCP)
Protections will be activated when output current exceeds
105%~150% of rated load current. In such occurrence, the VO
will start to droop and once the power supply has reached its
maximum power limit, the protection is activated and the power
supply will go into “Hiccup mode” (Auto-Recovery). The power
supply will recover once the fault condition of the OLP and OCP
is removed and IOis back within the specifications.
It is not recommended to prolong the duration of IOwhen it is
105%~150%, since it may cause damage to the PSU.
Short Circuit Protection (Auto-Recovery)
The power supply’s output OLP/OCP function also provides
protection against short circuits. When a short circuit is applied,
the output current will operate in “Hiccup mode”, as shown in
the illustration in the OLP/OCP section on this page. The power
supply will return to normal operation after the short circuit is
removed.
Overvoltage Protection (Latch Mode)
The power supply’s overvoltage circuit will be activated when its
internal feedback circuit fails. The output voltage shall not
exceed its specifications defined on Page 3 under “Protections”.
Power supply will latch, and require removal/re-application of
input AC voltage in order to restart.
The power supply should be latch.
Over Temperature Protection (Auto-Recovery)
As described in load de-rating section, the power supply also
has Over Temperature Protection (OTP). In the event of a
higher operating temperature at 100% load, the power supply
will run into OTP when the operating temperature is beyond
what is recommended in the de-rating graph. When activated,
the output voltage will go into bouncing mode until the
temperature drops to its normal operating temperature as
recommended in the de-rating graph.

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
13
Operating Mode
Redundancy Operation
In order to ensure proper redundant operation for the power
supply units (PSUs), the output voltage difference between the
two units must be kept at 0.45~0.50V for these 24V supplies.
Follow simple steps given below to set them up for the
redundant operation:
Step 1.
Measure output voltage of PSU 1 and PSU 2. If PSU 1 is the
master unit, then VOof PSU 1 must be higher than PSU 2. In
order to set the output voltage, individually connect each power
supply to 50% of rated load at any line voltage from 85-264Vac,
and set the PSU 1 and PSU 2 output voltage.
Step 2.
Connect the power supply units PSU 1 and PSU 2 to Vin 1 &
Vin 2, respectively, of the DRR-20N (or 20A) module shown on
the right of above diagram.
Fig. 5 Redundant Operation Connection Diagram
Step 3.
Connect the system load to Vout. Please note that output voltage Vout from DRR module will be = VO(output voltage of power supply) –
Vdrop* (in DRR module).
*Vdrop will vary from 0.60V to 0.90V (Typical 0.65V) depending on the load current and surrounding air temperature
Parallel Operation
The power supply units (PSUs) can also be used for parallel
operation in order to increase the output power. The difference
in output voltage between the two units must be kept to within
25mV of each other. This difference must be verified with the
same output load connected independently to each unit.
Parameters such as EMI, inrush current, leakage current,
PARD, start up time will be different from those on the
datasheet, when two units are connected in parallel. The user
will need to verify that any differences will still allow the two
power supplies connected in parallel will work properly in their
product/application.
Fig. 6 Parallel Operation Connection Diagram

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
48V 350W 1 Phase / PMT-48V350W1A
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)
14
Others
Delta RoHS Compliant
Restriction of the usage of hazardous substances
The European directive 2011/65/EU limits the maximum impurity level of homogeneous materials such as lead,
mercury, cadmium, chrome, polybrominated flame retardants PBB and PBDE for the use in electrical and
electronic equipment. RoHS is the abbreviation for “Restriction of the use of certain hazardous substances in
electrical and electronic equipment”.
This product conforms to this standard.
Attention
Delta provides all information in the datasheets on an “AS IS” basis and does not offer any kind of warranty through the information for
using the product. In the event of any discrepancy between the information in the catalog and datasheets, the datasheets shall prevail
(please refer to www.DeltaPSU.com for the latest datasheets information). Delta shall have no liability of indemnification for any claim
or action arising from any error for the provided information in the datasheets. Customer shall take its responsibility for evaluation of
using the product before placing an order with Delta.
Delta reserves the right to make changes to the information described in the datasheets without notice.

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