Desktop Switching Owner's Manual Power Supplies Model: SEC-1212 SEC-1223 Please read this manual before operating your unit
TABLE OF CONTENTS Topic Page Important safety instructions 2 Description and features 3 Connection and operation 4 Cooling and fan control 4 Battery charging and back up 5 Trouble shooting 5,6 Limiting Electromagnetic Interference 7 Switching Power Supplies & RF Noise 8,9,10 Specifications 11 Warranty 12
CAUTION ! RISK OF ELECTRIC SHOCK DO NOT OPEN 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. IMPORTANT SAFETY INSTRUCTIONS Please read before using your power supply. 1.) It Is recommended that you return your power supply to a qualified dealer for any service or repair. Incorrect assembly may result in electric shock or fire. 2.
DESCRIPTION SEC-1212/SEC-1223 are switched mode power supplies which convert 120 VAC, 60 HZ to regulated 13.8 VDC based on pulse width modulation ( PWM ) control. FEATURES + BASED ON SWITCHED MODE TECHNOLOGY AND PWM CONTROL + COMPACT AND LIGHTWEIGHT + HIGH EFFICIENCY AND LESS HEAT DISSIPATION + PROTECTED AGAINST SHORT CIRCUIT, OVER CURRENT AND OVER VOLTAGE (THROUGH PWM CONTROLLER) + SEC-1212 IS CONVECTION COOLED.
CONNECTION AND OPERATION WARNING ! Before plugging the unit to the AC outlet, please check that your local supply voltage is 120 VAC. NOTE: The DC output connector (RED + & BLACK -) has a tubular hole of dia. 0.2”(5mm) with a set screw. For a firm connection, crimp/solder a pin type copper terminal on the cable ends of your 12V DC device. Ensure that the power supply’s ON/OFF switch is off and it is unplugged from the AC outlet..
BATTERY CHARGING AND 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 resistor. The isolating diode will ensure that the battery does not back power the power supply.
PROBLEM : The output voltage is 0 V or very low PROBABLE CAUSE SUGGESTED REMEDY Input voltage is very low Check that the input voltage is 120VAC The unit is in current limit condition due to overload caused by large reactive loading or by the output being short circuited Check the output terminals are not shorted. Remove the load. If the output voltage gets restored, the load is shorted or is offering large reactive impedance. Unit is shut down due to over temp.
LIMITING ELECTROMAGNETIC INTERFERENCE (EMI) This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15(B) of the FCC Rules. These limits are designed to provide reasonable protection against a harmful interference in a residential installation. This equipment 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.
SWITCHING POWER SUPPLIES AND RF NOISE 1. Switched mode power supplies ( SMPS ) employ high frequency switching and thus, are a source of radio interference, a recipient of radio interference and a conduit of radio interference. ( Older linear type transformer based power supplies do not employ high frequency switching voltages and will be quieter as compared to switching type of supplies ). 2.
4. 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 these noises will be below the background or “band” noise. Increase the separation between the power supply and the receiving antenna. Use an outdoor antenna.
7. Following additional guidelines may be followed to reduce the effects of RF noise: a. Use additional appropriate AC radio frequency interference (RFI) power line filter immediately before the ac input of the power supply. Recommended: Corcom Inc. ( www.cor.com ) “Q” series. Filtered, ferrite coated cord set (www.emceupen.com ) is another choice. These cord sets, with integral line interference filters, reduce common and differential mode interferences over a wide frequency range.
SPECIFICATIONS INPUT VOLTAGE(nominal) 120 VAC, 60 HZ OUTPUT VOLTAGE 13.8 VDC OUTPUT RIPPLE & NOISE (On Full Load) 150 mV PEAK TO PEAK OUPUT CURRENT, SEC-1212 SEC-1223 10 A 23A CURRENT LIMIT SEC-1212 SEC-1223 14A 25A COOLING SEC-1212 - CONVECTION COOLED SEC-1223 - TEMPERATURE CONTROLLED FAN PROTECTIONS OVER CURRENT, SHORT CIRCUIT AND OVER VOLTAGE (Through PWM Controller) OVER TEMPERATURE SHUT DOWN (SEC-1223) ENVIRONMENTAL TEMP.
3 YEAR Limited Warranty SEC-1212/SEC-1223 manufactured by Samlex America, Inc. ( the “ Warrantor “ ) are warranted to be free from defects in workmanship and materials under normal use and service. This warranty is in effect for 3 years from the date of purchase by the user ( the “ Purchaser “ ) 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.
Notes:
Attach copy of receipt here:
110-17 Fawcett Rd T: 604 525 3836 Coquitlam, B.C. F: 604 525 5221 Canada V3K 6V2 Vesion SEC1212_SEC1223(July2005) e-mail: samlex@samlexamerica.com website: www.samlexamerica.
