samlexpower SEC-1212CE 10A Desktop Switching Power Supply Owner’s Manual

SEC-1212CE 10A Desktop Switching Power Supply
Owner’s Manual

Disclaimer of Liability
UNLESS SPECIFICALLY AGREED TO IN WRITING, SAMLEX AMERICA INC:

1. MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY, OR SUITABILITY OF ANY TECHNICAL OR OTHER INFORMATION
   PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION.

2. ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS, OR EXPENSES, WHETHER SPECIAL, DIRECT,
   INDIRECT, CONSEQUENTIAL, OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH  INFORMATION WILL BE ENTIRELY AT THE USER’S RISK.

Samlex America Inc reserves the right to revise this document and to periodically make changes to the content
hereof without obligation or organization of such revisions or changes.

Copyright Notice/Notice of Copyright
Copyright © 2022 by Samlex America Inc. All rights reserved. Permission to copy, distribute and /or modify this document is prohibited without express written permission by  Samlex America Inc.

SECTION 1 Important Safety Instructions

CAUTION: RISK OF ELECTRIC SHOCK! DO NOT OPEN IT!
WARNING—TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. THERE ARE NO  USER-SERVICEABLE PARTS INSIDE— REFER TO QUALIFIED SERVICE PERSONNEL.

The following safety symbols will be used in this manual to highlight safety and information:

WARNING!
Indicates the possibility of physical harm to the user in case of non- compliance.
CAUTION!
Indicates the possibility of damage to the equipment in case of non- compliance.
INFO
Indicates useful supplemental information.

Please read before using your power supply:

1. It Is recommended that you return your power supply to a qualified Samlex dealer for any service or repair. Incorrect assembly may result in electric shock or fire.
2.  To reduce the risk of electric shock, unplug the power supply from the outlet before attempting any maintenance or cleaning. Turning off controls will not reduce this risk.
3. An extension cord should not be used unless absolutely necessary. If an extension cord must be used make sure that the pins on the plug are the same number, size, and shape as those of the original power supply plug.
4. Place the unit in an area that will allow air to flow freely around the unit. DO NOT BLOCK OR OBSTRUCT vent openings on the side/bottom of the unit.
5. Keep the unit away from moisture and water.
6. NEVER operate the units in parallel.

WARNING!
Your power supply should be grounded to reduce the risk of electric shock. The power supply is equipped with a grounding conductor and grounding plug.

The cord must be plugged into an outlet that is properly installed and grounded in accordance with all local codes and ordinances. Never alter the AC cord or the plug provided. If the cord will not fit the outlet, have a proper outlet installed by a qualified electrician. Improper connection can result in a risk of electric shock.

DO NOT USE THE POWER SUPPLY FOR DIRECT CHARGING OF THE BATTERY OR DIRECT CONNECTION TO A BATTERY FOR BATTERY BACK-UP. (Please read the section on Battery Back-up).

SECTION 2  Layout & Dimensions

1. Lighted Power ON/OFF Rocker Switch (Lights Red when ON)
2. AC Power Cord Inlet: Type “IEC 320-C14” for detachable power cord with “IEC 320-C13” connector on one end and European “Schuko” (CEE 7/7) plug on the other end.
3. Black Negative (-) DC Load Terminal {Tubular hole Dia 5mm/0.2” and set screw (slot head, #10, 24 TPI, 5/16” long)}
4. Red Positive (+) DC Load Terminal {Tubular hole Dia 5mm/0.2” and set screw (slot head, #10, 24 TPI, 5/16” long)}
5. Air inlet slots for the cooling fan (cooling fan and air outlet slots at the bottom – not shown)

1. Lighted Power ON/OFF Rocker Switch (Lights Red when ON)
2. AC Power Cord Inlet: Type “IEC 320-C14” for detachable power cord with “IEC 320-C13” connector on one end and European “Schuko” (CEE 7/7) plug on the other end.
3. Black Negative (-) DC Load Terminal {Tubular hole Dia 5mm/0.2” and set screw (slot head, #10, 24 TPI, 5/16” long)}
4. Red Positive (+) DC Load Terminal {Tubular hole Dia 5mm/0.2” and set screw (slot head, #10, 24 TPI, 5/16” long)}
5. Air inlet slots for the cooling fan (cooling fan and air outlet slots at the bottom – not shown)

SECTION 3 Product Overview

DESCRIPTION
SEC-1212CE / SEC-1223CE are switched-mode power supplies that convert 230 VAC, 50/60 Hz to regulated 13.8 VDC based on pulse width modulation (PWM) control.

Features
– Based on switched-mode technology and PWM control. Switching frequency:

• SEC-1212CE: 20 kHz
• SEC-1223CE: 25 kHz
  – Compact and lightweight.
  – High efficiency and less heat dissipation.
  – Protected against short circuits, over current, and over-voltage (through PWM controller).
  – SEC-1212 is convection cooled. SEC-1223 has forced air cooling and over- temperature shut down.
  – CE marked.

CONNECTION & OPERATION

WARNING!
Before plugging the unit into the AC outlet, please check that your local supply voltage is 230 VAC.
NOTE! The DC output connector (RED + / BLACK -) has a tubular hole of a diameter of 0.2” (5mm) with a set screw. For a firm connection, crimp/solder pin type copper terminal on the cable ends of your 12V DC device (2 Pin Types of terminals have been supplied with the unit).
Ensure that the power supply’s ON/OFF switch is off and it is unplugged from the AC outlet. Switch off your 12 V DC device and connect it’s Positive and Negative to the  RED (Positive) and BLACK (Negative) terminals respectively. Ensure that the connections are secure and tight. Plug the power supply into the AC outlet. Press the ON/OFF  switch of the power supply to ON and observe that the neon indicator in the switch illuminates. If the indicator fails to light, recheck the connection, AC outlet, and the fuse inside the power supply.

Your 12V DC device may now be switched ON.

COOLING (SEC-1212CE)
SEC-1212CE is cooled by convection. PLACE THE SEC-1212CE UNIT IN A WELL- VENTILATED OPEN AND COOL AREA. DO NOT BLOCK THE VENTILATION OPENINGS ON THE SIDES.

Cooling & Fan Control/Thermal Shut Down (SEC-1223CE)
SEC-1223CE is cooled by convection and forced air. A temperature-controlled fan has been provided to improve cooling at higher loads. The fan is controlled by a sensor mounted on the power transformer. THE FAN WILL BE OFF AT LOWER LOADS. It will come on only when the temperature of the power transformer is ≥ 60ºC ± 5ºC /  140ºF ± 9ºF due to higher loads or higher ambient temperature or poor cool air circulation around the unit. The fan will switch off automatically at ≤ 40ºC ± 5ºC / 104ºF ±  9ºF. In case the fan fails or the airflow is blocked, a second temperature sensor mounted on the power transformer will activate over temperature shut down at ≥ 105ºC ± 5ºC  / 221ºF ± 9ºF. The output voltage will be automatically resumed once the unit cools down to ≤ 75ºC ± 5ºC / 167ºF ± 9ºF. PLACE THE SEC-1223 UNIT IN A WELL- VENTILATED OPEN AND COOL AREA. DO NOT BLOCK THE OPENINGS AT THE FAN DISCHARGE ON THE BOTTOM AND THE SUCTION. OPENINGS ON THE SIDES.

BATTERY CHARGING & BATTERY BACK-UP 

WARNING!
These units are power supplies and not battery chargers. Do not connect these units directly to a battery.

These units should NOT BE DIRECTLY CONNECTED TO A BATTERY for charging or for battery back-up. Battery charging and battery back-up may be undertaken only when the battery is connected through suitable external isolating diodes and charge limiting resistors.

The isolating diode will ensure that the battery does not back power the power supply.
When a battery is deeply discharged, it will initially draw a very large charging current and thus, will force the power supply into a current limit mode for prolonged periods. This is harmful to the power supply. The charge limiting resistor will limit the charging current, thereby, ensuring that the maximum charging current is well below the current limit value of the power supply.

INFO
It is recommended that the optional battery backup module BBM-1225 may be used to convert SEC-1212CE/SEC-1223CE for battery backup applications.

SECTION 4 Troubleshooting Guide

OPERATION AS A SIMPLE POWER SUPPLY – ONLY LOAD IS CONNECTED.
NO EXTERNAL BATTERY AND NO BATTERY BACKUP.

ON / OFF Switch is ON
•Switch is NOT lighted
•No DC output| No AC power from the AC outlet
The internal AC side fuse is blown| Check AC power is available at the AC outlet. The breaker feeding the AC outlet may have tripped.
Open the top cover and check the AC side fuse. Replace if blown.
if the fuse blows again, the input section is damaged. Please call Tech Support.
ON / OFF Switch is ON
•Switch is lighted
•No DC output| The unit has shut down due to overtemperature — The temperature of output transformer windings is a 105°C t 5°C / 221°F t 9°F (For SEC-1223CE only)| Check that the fan is running. If not, the
fan / fan control circuit may have been damaged. Call Tech Support.
Check that the fan suction vents on the sties of the unit and the discharge vents on the bottom of the unit are not blocked.
The unit will reset automatically when the transformer windings cool down to
s 75°C t 5°C / 167°F t 9°F
ON / OFF Switch is ON
•Switch is lighted
•DC Output voltage drops| If the voltage loses regulation and drops to < 13.5V, the unit is overloaded and is within the current limit. The load is trying to draw a current limit value
If the voltage drop is considerable with voltage < 2V, the load side is seen a short circuit and the short circuit current limited to the current limit value is being driven into the short circuit| Reduce the current drawn by the load to less than the continuous rating.
Switch OFF the load. Remove the short circuit on the load side.
GFCI outlet / GFCI breaker supplying AC power to the unit trips when the unit is switched ON| Additional RF noise currents from the unit that are filtered to Earth Ground increase the net Leakage Current on the GFCI outlet / GFCI breaker to > 5mA| Switch OFF other SMPS devices operating from the same GFCI outlet / GFCI breaker to reduce the net leakage current to < 5mA
Move the unit to another GFCI outlet / GFCI breaker that has a lesser number of SMPS load(s) or no SMPS load
Power the unit from a normal, non GFCI outlet or from an outlet not protected by a GFCI breaker

SECTION 5 Limiting Electromagnetic Interference

CAUTION!
Conducted and radiated noises in this unit are limited as per the applicable National / International Standards. In North America, the applicable standard is FCC Part 15(B) for Class “B” Digital Devices for Residential Installations. The corresponding European standard is  EN55022,  Class “B” & EN610000-3-2, 3.
This unit generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, this does not guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the measures recommended in the following paragraphs.

UN-INTENTIONAL RF NOISE GENERATED BY SWITCHED MODE POWER SUPPLIES (SMPS)
Switched Mode Power Supplies (SMPS) employ high-frequency switching (25 kHz in this unit) and thus, are a source of radio interference, a recipient of radio interference, and a conduit of radio interference. (Older Linear Type, low frequency 50 / 60 Hz transformer-based power supplies do not employ high frequency switching voltages and will be quieter as compared to SMPS).

The primary emission sources originate in the switching devices due to their fast switching current transitions: harmonics of the switching frequency and broadband noise created by under-damped oscillations in the switching circuit. The secondary source is from the bridge rectifier, both rectifier noise, and diode recovery. The AC input rectifier/capacitor in the front end of the SMPS (excepting those with Power Factor correction) generates power supply harmonics due to the non-linear input current waveform. The noise is both conducted and radiated through the input power cord and the DC output wiring to the radio.

FILTRATION OF CONDUCTED NOISE
The conducted RF noise from this SMPS unit is limited to the maximum allowable levels by internal filtration. The filtered RF noise currents (< few hundred micro Amps) are
bypassed to the chassis of the power supply. The chassis is, in turn, connected to the Earth Ground pin of the AC input power cord (for Class 1 units). Thus, the filtered noise currents are intentionally leaked to the Earth’s Ground. This is termed the “Earth Leakage Current”.

EXCESSIVE RF OUTPUT INTERFERENCE BY SMPS DUE TO INCOMING RF INTERFERENCE WHEN POWERING RADIO TX / RX
SMPS are also recipients of radio interference. The normal operation of the power supply can be disturbed due to RF noise getting coupled into the power supply. Thus,
the power supply may generate excessive RF noise and lose output voltage regulation due to excessive transmitter energy being coupled through the AC / DC lines to the power supply’s regulator feedback path. This may be due to the antenna being too close or due to the antenna or feed system not radiating properly. First, check the antenna system SWR.

Then, if necessary, relocate either the antenna or the power supply farther apart. The receiver may “hear” the power supply. A slowly moving, slightly buzzing carrier heard in
the receiver may be caused by the antenna being too close. As with the transmitter-related noise pick up, a loose coaxial connector or a broken or a missing ground may aggravate this problem. Normally, this noise will be below the background or “band” noise. Increase the separation between the power supply and the receiving antenna. Use an outdoor antenna. This will reduce the amount of signal picked up from the power supply and also increase the amount of the desired signal.

ADDITIONAL GUIDELINES FOR REDUCING RF NOISE

• Use additional appropriate AC Radio Frequency Interference (RFI) Power Line Filter rated for a minimum of 6A immediately before the AC input of the power supply. For example, consider the suitability of Model # 6VN1 from TE Connectivity www.te.com  or similar. Filtered, Ferrite Coated Cord Set is another choice. These cord sets, with integral line interference filters, reduce Common and Differential Mode Interference over a wide frequency range. Because they are shielded, they are also effective against radiated interferences. In addition to the built-in filter networks, the cable conductors are coated with an RF absorbing ferrite compound. This provides additional attenuation at high frequencies that are lacking in most regular LC filters. The RF absorption of the ferrite-coated cable avoids resonances at high frequencies, reducing the conducted and radiated  RF noises even further. For example, consider the suitability of EMC Cord “IMU-13” from EMC Eupen www.emceupen.com or similar.
• Use additional appropriate DC radio frequency interference (RFI) power line filter rated for a minimum 30 A immediately after the DC output of the power supply. For example, consider the suitability of 30A filter Model # “FD10EE030” from Curtis Industries  www.curtisind.com or similar.
• Twist the Positive and Negative wires from the output of the power supply to the radio.
• The DC side Positive and Negative outputs of these power supplies are isolated from the chassis. As explained earlier, the noise currents are filtered to the chassis of the unit, and the chassis is connected to the Earth Ground through the Earth Ground Pin of the AC power outlet receptacle. Avoid connecting (referencing) the DC Negative output terminal of the power supply to the Earth Ground.
• Connect a ¼” wavelength of wire on the Negative terminal of the power supply. Connect one end of the wire to the Negative terminal and leave the other end free.
  The wavelength corresponds to the wavelength of the interfering frequency. (May is not practical for long wavelengths).

[Formula: Wavelength (Meters) = 300 / frequency in MHz]

COMBINED FILTERED NOISE CURRENTS FROM MULTIPLE SMPS ON A BRANCH CIRCUIT MAY TRIP GROUND FAULT CIRCUIT INTERRUPTER (GFCI)
During malfunction or an accident, the metal chassis of a device may get energized to unsafe voltage due to an internal high voltage section coming in contact with the chassis.
If a person standing on Earth touches this energized chassis, a leakage current proportional to the person’s skin resistance will flow through the person’s body to Earth Ground.  The leakage current through the body is higher when the skin contact resistance is lower i.e. if the skin is wet or wounded. This leakage current does not return to the power source but is dissipated in Earth Ground. A leakage current of > 5mA  could produce a lethal electrical shock. Ground Fault Circuit Interrupter (GFCI) is used for safety against electrical shock due to leakage. GFCI measures the difference between the current sent to the load and returned from the load and will trip and disconnect the power circuit if the difference is > 5 mA. GFCIs are normally installed in AC
BranchCircuits feeding power outlets in wet areas like marine craft, RVs, spas, hot tubs, kitchens, washrooms, etc.

As explained earlier, RF noise filtration circuits in SMPS generate intentional Earth Leakage
Current. SMPS are used extensively as DC power sources in modern-day electrical/electronic devices e.g. Audio / Video / Computing devices, power supplies, battery chargers, etc. A single GFCI outlet / GFCI breaker may be serving multiple SMPS loads and therefore, will be sensing the sum of all the Earth Leakage Currents and, if the sum is >  5mA after connecting this unit, the GFCI will trip. In such a case, disconnect another SMPS-based device (s) being served by this GFCI one by one till the net leakage current is reduced to < 5mA and the GFCI does not trip. Another solution is to power this unit from a GFCI outlet / GFCI breaker that does not have any SMPS load or power from an outlet that is not protected by GFCI.

SECTION 6 Specifications

| SEC-1212CE| I SEC-1223CE
---|---|---
AC INPUT
Nominal AC Input Voltage| 230 VAC x 10%, 50/60 Hz
Input Current| 1.25 A| I 2.75A
Input Current at No Load| 120 mA s 10%
Inrush is current at  Startup| 20A +/- SA for < 5 ms| I 30A +/- SA for < 5 ms
DC OUTPUT
Output Voltage| 13.8VDC s 0.1V
Output Current| •Continuous: 10A
•Current Limit: 14A. Auto recovery| •Continuous: 23A;
•Current Limit: 25A. Auto recovery
Output Noise and Ripple| < 150 mV Peak to Peak
Peak Efficiency| 85% 4-5%
DESIGN
Type| Switch Mode Power Supply (SMPS) with Fixed Frequency Pulse Width Modu-
lation (PWM)
Output Side Switching| Frequency
20 kHz| 25 kHz
PROTECTIONS
Short Circuit. Overload| Constant Current Limiting at MA;
Auto Reset| Constant Current limiting at 25A;
Auto Reset
Over Voltage| Regulated by PWM Controller
Over Temperature| Cooled by convection. No protection
is necessary| Output shuts down when Power Transformer winding temperature 2
105°C 3°C / 221°F9″; Auto rests on cooling down to s 75°C: 5°C /
167`F x 9°F
COOLING
Type of cooling| Convection — No fan| Temperature-controlled fan. ON when Power Transformer winding
temperature is z 60°C x 5°C / 140°F t 9°F; OFF when cooking down to s 40°C 2 5°C / 104°F x 9°F
FUSE
Internal AC Side Fuse| •5 mm x 20 mm Glass Fuse
•250V, 2k Time Delay Type
•LittelFuse – “218002”| •5 mm x 20 mm Glass Fuse
•250V, 4k Time Delay Type
•LittelFuse – “218004”
| I SEC-1212CE| I SEC-1223CE
---|---|---
COMPLIANCE
Safety| IEC/EN 60950-1
Electromagnetic Compatibility-Immunity| IEC/EN61000-4-2; IEC/EN61000-4-3
IEC/EN61000-4-4; IEC/EN61000-4-5
IEC/EN61000-4-6; IEC/EN61000-4-11
INPUT / OUTPUT CONNECTIONS
AC Input Connection| •”IEC 320-C 14″ Inlet Connector on the unit
•Detachable Power Cord with:
•”IEC 320-C13″ Connector on one end
•European “Schuko” (CEE 7/1) Plug on the other end
DC Output Connectors| Terminal with Tubular Hole – Diameter 5mm / 0.2″ and set screw (#10, 24
TPI, 5/16″ long)
ENVIRONMENTAL
Operating Temperature Range| 0°C / 32°F to 30°C / 86°F| 0°C / 32°F to 40°C / 104°F
DIMENSIONS AND WEIGHT
Dimensions (W x D x H)| 185 x 208 x 59.5 mm| 185 x 208 x 61 mm
7.28 x 8.19 x 2.34 in| 7.28 x 8.19 x 2.40 in
Weight| 1.36 kg| 1.6 kg
3.0 lb| 3.5 lb

NOTE: Specifications are subject to change without notice.

SECTION Warranty

3 YEAR LIMITED WARRANTY
SEC-1212/SEC-1223 manufactured by Samlex America Inc. (the “Warrantor“) is warranted to be free from defects in workmanship and materials under normal use and service. The warranty period is 3 years for the United States and Canada and is in effect from the date of purchase by the user (the “Purchaser“).

Warranty outside of the United States and Canada is limited to 6 months. For a warranty claim, the Purchaser should contact the place of purchase to obtain a Return  Authorization Number.

The defective part or unit should be returned at the Purchaser’s expense to the authorized location. A written statement describing the nature of the defect, the date of purchase,  the place of purchase, and the Purchaser’s name, address, and telephone number should also be included.

If upon the Warrantor’s examination, the defect proves to be the result of defective material or workmanship, the equipment will be repaired or replaced at the Warrantor’s
option without charge and returned to the Purchaser at the Warrantor’s expense. (The contiguous US and Canada only).

No refund of the purchase price will be granted to the Purchaser unless the Warrantor is unable to remedy the defect after having a reasonable number of opportunities to do so. Warranty service shall be performed only by the Warrantor. Any attempt to remedy the defect by anyone other than the Warrantor shall render this warranty void. There shall be no warranty for defects or damages caused by faulty installation or hook-up, abuse or misuse of the equipment including exposure to excessive heat, salt or fresh water spray, or water immersion.

No other express warranty is hereby given and there are no warranties which extend beyond those described herein. This warranty is expressly in lieu of any other expressed
or implied warranties, including any implied warranty of merchantability, fitness for the ordinary purposes for which such goods are used, or fitness for a particular purpose, or any other obligations on the part of the Warrantor or its employees and representatives.

There shall be no responsibility or liability whatsoever on the part of the Warrantor or its employees and representatives for injury to any persons, damage to person or persons, damage to property, loss of income or profit, or any other consequential or resulting damage which may be claimed to have been incurred through the use or sale of the equipment, including any possible failure of malfunction of the equipment, or part thereof. The Warrantor assumes no liability for incidental or consequential damages of any kind.

Samlex America Inc. (the “Warrantor”)
www.samlexamerica.com

Notes

Contact Information
Toll-Free Numbers
Ph: 1 800 561 5885
Fax: 1 888 814 5210
Local Numbers
Ph: 604 525 3836
Fax: 604 525 5221
Website
www.samlexamerica.com
USA Shipping Warehouses
Kent, WA
Plymouth, MI
Canadian Shipping Warehouse
Richmond, BC
Email purchase orders to
orders@samlexamerica.com

References

• Standard & Custom Electrical Component Manufacturer | Curtis Industries
• EMCEUPEN | Emceupen Website
• Samlex America | Power Inverters, Battery Chargers, Solar Panel Kits

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