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PMT Series
Technical Data Sheet
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Delta PMT Series, PMT-48V350W1AKA, PMT-48V350W1AR, PMT-48V350W1ARA, PMT-48V350W1AK Technical Data Sheet

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TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
1
CC Code**
□ □
R K*
□□
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
Number
Model
PMT-48V350W1A☐☐

Model Numbering

Input Voltage Range Rated Output Voltage
90-132Vac, 180-264Vac (Selectable by Switch)
48Vdc 7.30A
Rated Output Curr
ent
PM
Panel Mount Product Type
*Options **For Terminal Block Type
T – 48V
Output Voltage Output Power Single Phase No PFC Connector Type
T – Enclosed
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
350W 1 A
Blank – Without
R – Terminal Block K – Front Face*
connector cover A – With connector cover
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
2
PMT-48V350W1AR☐
□□

Specifications

Input Ratings / Characteristics

Nominal Input Voltage
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

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
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
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-48V350W1AK M3.5 x 9 Pins (Rated 300V/20A)
Wire
Noise (1 Meter from power supply)
Aluminium
100-120Vac, 200-240Vac (Selectable by Switch)
< 3.5mA @ 240Vac
< 50ms @ nominal input (100% load)
M3.5 x 9 Pins (Rated 300V/15A)
AWG 22-12
Sound Pressure Level (SPL) < 52dBA
.
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
3
Operating
-10°C to +70°C
< 200Vac de-rate power by 3% / V
□□

Environment

Surrounding Air Temperature
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
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
Overload / Overcurrent 105%~150% of rated load current, Hiccup Mode,
Over Temperature Hiccup Mode, Non-Latching
Short Circuit Hiccup Mode, Non-Latching
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
Expected Cap Life Time 10 years (115Vac & 230Vac, 50% load @ 40°C)
57.6V~67.2V, Latch Mode
Non-Latching (Auto-Recovery)
(Auto-Recovery when the fault is removed)
(Auto-Recovery when the fault is removed)
I/P: 100Vac, O/P: 100% load, Ta: 35°C
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
4
Safety Entry Low Voltage
SELV (EN 60950-1)
CB scheme
IEC 60950-1
Emissions
Contact Discharge: 8kV
Differential Mode3): 1kV
Differential Mode3): 1kV

Safety Standards / Directives

□□
Electrical Safety
CE In conformance with EMC Directive 2014/30/EU and Low
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
TUV Bauart
UL/cUL recognized
EN 60950-1 UL 60950-1 and CSA C22.2 No. 60950-1 (File No. E131881)
Voltage Directive 2014/35/EU
EMC
(CE & RE)
Immunity EN 55024
Electrostatic Discharge IEC 61000-4-2 Level 4 Criteria A1)
Radiated Field IEC 61000-4-3 Level 3 Criteria A1)
Electrical Fast Transient / Burst IEC 61000-4-4 Level 3 Criteria A1)
Surge IEC 61000-4-5 Level 3 Criteria A1)
CISPR 32, EN 55032, EN 55011, FCC Title 47: Class B
Air Discharge: 15kV
80MHz-1GHz, 10V/M with 1kHz tone / 80% modulation
2kV
Common Mode2): 2kV
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 Mode
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)
2)
: 2kV
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
5
PMT-48V350W1AR: Terminal Block
PMT-48V350W1AK: Front Face

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
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
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)
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
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)
□□
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
8
Note
exceeds its
when the surrounding air
y the power
orientation, please contact
Fig. 1 De-rating for Vertical and Horizontal Mounting Orientation
No output power de-rating for the input

Engineering Data

Output Load De-rating VS Surrounding Air Temperature

> 50°C de-rate power by 2.5% / °C

Output De-rating VS. Input Voltage

□□
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 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 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 supply, the device can be very hot!
5. If the device has to be mounted in any other
info@deltapsu.com for more details.
voltage from 100Vac to 132Vac & 200Vac to 264Vac
■ L Frame / Enclosed
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
9
Only use M4 screw ≤ 5 mm (0.20 inch) through the base mounting holes
Fig. 3 Mounting Hole Locations and the Safety Distance
Safety Distance
□□

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).
D1 = 4mm Min. D2 = 20mm Min.
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).
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. 4 Assembly Reference
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
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.
•
•
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
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.
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
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 V 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 I
It is not recommended to prolong the duration of I
105%~150%, since it may cause damage to the PSU.
is back within the specifications.
O
when it is
O
O

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.
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
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 V 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.
Step 3.
Connect the system load to V V
* (in DRR module).
drop
*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.
of PSU 1 must be higher than PSU 2. In
O
. Please note that output voltage V
out
Fig. 5 Redundant Operation Connection Diagram
from DRR module will be = VO (output voltage of power supply) –
out
Fig. 6 Parallel Operation Connection Diagram
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
TECHNICAL DATASHEET
PMT Panel Mount Power
Supply
48V 350W 1
Phase
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.
All parameters are specified at 25°C ambient and AC input unless otherwise indicated. www.DeltaPSU.com (November 2018, Rev. 04)
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