1. Manuals
  2. Brands
  3. SamplexPower Manuals
  4. Power Supply
  5. SEC-4825BRM
  6. Owner's manual

SamplexPower SEC-4825BRM Owner's Manual

N + 1 dc power system
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
N + 1
DC Power
System
SEC-4825BRM
owner's
Please read this
manual BEfoRE
Manual
installing the
unit

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SEC-4825BRM and is the answer not in the manual?

Questions and answers

Related Manuals for SamplexPower SEC-4825BRM

Summary of Contents for SamplexPower SEC-4825BRM

  • Page 1 N + 1 owner's Please read this manual BEfoRE Manual DC Power installing the System unit SEC-4825BRM...

  • Page 2: Table Of Contents

    OwNer'S MaNual | Index Section 1 Safety Instructions ..............3 Section 2 Layout, Dimensions & Input/Output Connections ....5 Section 3 Design & Principle of Operation ........... 7 Section 4 Protections ................ 19 Section 5 Installation ................ 21 Section 6 Operation ................

  • Page 3: Safety Instructions

    SeCtION 1 | Safety Instructions IMPORTANT SAFETY INSTRUCTIONS SAVe tHeSe inStRUctionS This manual contains important Safety and operating Instructions. Please read before using this unit . The following safety symbols will be used in this manual to highlight safety and information: WARninG! Indicates possibility of physical harm to the user in case of non-compliance.
  • Page 4 SeCtION 1 | Safety Instructions 3-prong, grounded female receptacle (NEMA L5-30R). The size of the current carrying conductors should be at least AWG#10 for NEMA L5-30. 7. 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 sides and at the back or install the unit in an enclosed compartment.

  • Page 5: Layout, Dimensions & Input/Output Connections

    SeCtION 2 | layout, Dimensions & Input/Output Connections Fig. 2.1 FRONT VIEW 48V Battery 48V Load Fig. 2.1 BACK VIEW Fig. 2.1 Layout and Input/Output Connections Legend - Fig 2.1 FRont VieW AC Power ON/OFF Switch Illuminates RED when ON AC Input Breaker 25A.
  • Page 6 SeCtION 2 | layout, Output Connection & Dimensions 1. Dimensions Overall (including protrusions) Wide(W): 482.6 mm / 19.00” Depth (D) : 407.6 mm / 16.05” Height (H): 87.7 mm / 3.45” 407.6 407.6 407.6 407.6 2. Dimensions (Mounting Holes) Width (W): 466.73 mm / 18.38” Height (H): 76.2 mm / 3.00”...

  • Page 7: Design & Principle Of Operation

    Design & Principle of Operation DeScRiPtion SEC-4825BRM is a Switch Mode Power Supply (SMPS), which converts 120 VAC, 50/60 Hz to 48VDC Nominal (actually 54.8VDC at no load to 54.2V at 25A). It has additional provi- sion for 48V battery backup with 2A charging in conjunction with external 48V Lead Acid Battery (not supplied).
  • Page 8 SeCtION 3 | Design & Principle of Operation * note: it is likely that due to drift in the pre-set values of components, the minimum internal preload current may not be sufficient to provide adequate feedback signal strength resulting in shut down of one or more modules when no external load is present (the associated PSM Status LeD will flash and also, the associated signal for remote indication will oscillate between High and Low).
  • Page 9 SeCtION 3 | Design & Principle of Operation BATTERY POSITIVE BUS BAR BATTERY from LOAD NEGATIVE BUS BAR LOAD LeGenD D1, D2 Schottky Diode, 40CPQ060 by International Rectifier 10A, 600V Diode “10A6” for reverse polarity protection R1, R2 Power Resistor 12 ohm, 35W Static Load Resistor, 1K, 5W Fig 3.1 Schematic - Battery Backup common DC bus bar (before the Schottky Diode D1) is tightly regulated at the preset...
  • Page 10 SeCtION 3 | Design & Principle of Operation from the above equation, it will be seen that the battery will be charged at a maximum charging current of around 2A when the battery is completely discharged to Stand- ing Voltage of 42.8V and the charging current will taper to a very low value of around 25mA when the battery is charged to float Voltage Level of 54.6V.
  • Page 11 SeCtION 3 | Design & Principle of Operation †operational color code output Pins of condition or item Pin no. of Wire opto isolator Parameter (High) Black Collector AC input is White Emitter available orange Collector fan failure Green Emitter Gray Collector PSM 1 Normal Violet...
  • Page 12 SeCtION 3 | Design & Principle of Operation PSM1 PCB Opto-Isolator “M-20-48V” PCB “M-20-P” DB-25 Connector IC-1 GRAY PIN 1 is GRAY To Figures: HIGH (5V) PSM GND when PSM 1 3.3B/3.3C/3.3D VIOLET is Normal LED 1 VIOLET V CE – Max 35V I C –...
  • Page 13 SeCtION 3 | Design & Principle of Operation Principle of operation is explained in Figs 3.3A to 3.3D below using example of remote monitoring of the operational status of Power Supply Module no. 1 (PSM1). operation inside the Power Supply Please refer to fig 3.3A.
  • Page 14 PSM 3 PSM 1 PSM 2 PSM 4 PSM 5 SeCtION 3 | Design & Principle of Operation PSM 3 PSM 1 PSM 2 PSM 4 PSM 5 PCB (Printed Circuit Board) Jump 1 Jump 1 Jump 1 Jump 1 Jump 1 PCB (Printed Circuit Board) Jump 1...
  • Page 15 SeCtION 3 | Design & Principle of Operation not be able to function normally as Slaves and their associated LEDs “PSM x” will flash randomly. The output voltage of the common DC bus (before Schottky Diodes D1) will read the higher voltage of this module.
  • Page 16 SeCtION 3 | Design & Principle of Operation No. 5. AC input is connected only to the module being adjusted. Ac input to the remaining modules is disconnected. Procedure for Adjusting output Voltage of Modules (continued) 3. Prepare PSM 1 for adjustment by Removing AC input connections (female quick connect terminals connected to the L and N male tab terminals on the module –...
  • Page 17 SeCtION 3 | Design & Principle of Operation inStALLAtion AnD ReMoVAL oF PoWeR SUPPLY MoDULeS Please refer to figs. 3.4, 3.5 and 3.6 (pages 13 & 14). Replacing Defective Module with new Module Replacement Module can be ordered under Model No. “SEC-0548MPSB”. The optional module comes with an LED and LED holder.
  • Page 18 SeCtION 3 | Design & Principle of Operation 10. Replace the top cover. Power on the unit and confirm that the “PSM Status” LEDs of all the installed modules are lighted. Bypassing Defective Module - (Pending Replacement with new Module) Assume one of the 5 modules is defective and a new replacement module is not avail- able.

  • Page 19: Protections

    SeCtION 3 | Design & Principle of Operation sink. If the fans are operating normally but the ambient temperature of cooling air is higher than 40°C and the unit is operating at full load, the temperature of the heat sink will rise. When the temperature exceeds allowable threshold, buzzer alarm will be sounded and front panel Red LED “fan failure”...

  • Page 20: Over Temperature Protection

    SeCtION 4 | Protections 30A will now be fed from the battery and the battery will start draining at this differen- tial current. for example, if the overload current was 40A, the Power Supply Section will provide 30A and the battery will provide the balance 10A. The battery will start draining at 10A.

  • Page 21: Installation

    SeCtION 4 | Protections Details are given below: • In case any one of the 2 fans fails (open circuit, short circuit, low RPM), buzzer alarm will be sounded and front panel Red LED “fan failure” (6, fig 2.1) will be lighted. At the same time, alarm signal will be provided for remote signaling (Pins 12 and 19 of DB-25 Connector at the back of the unit - 12, fig 2.1).

  • Page 22: Dc Output Connections

    SeCtION 5 | Installation Dc oUtPUt connectionS The Load Terminals (7A, 7B - fig 2.1)and the Battery Terminals (8A, 8B - fig 2.1) have 5/16” diameter tubular hole with set screw (5/16” x 3/8”long x 24TPI). for ensuring firm connection under the set screw, 4 pieces of Pin Type of Terminal Lugs “PTNB10-12”...

  • Page 23: Operation

    SeCtION 5 | Installation For effective protection, appropriate sizes of fuses should be located as follows: • External Battery Side Fuse (F1) should be LOCATED as close to the battery Positive post as possible, preferably within 7” of the battery Positive post • External Load Side Fuse (F2) should be installed as close as possible to the Positive Load Terminal for this unit, external fuses must be used for protection against reverse polarity and short circuit as follows (please see specs for f1 &...
  • Page 24 SeCtION 6 | Operation Switching on (With Battery Backup - external Battery is connected): Check that the load has been connected to the Load Terminal (7A, 7B, fig 2.1) and NoT to the Battery Terminals (8A, 8B - fig 2.1). Check that the load has been connected to the Load Terminals (7A, 7B - fig 2.1) through external 25A Load Side fuse (f2).

  • Page 25: Limiting Electro-Magnetic Interference (Emi)

    SeCtION 6 | Operation If AC input power fails, the DC load(s) will be instantaneously transferred to the external 48V backup battery and the battery will start discharging. When the battery is supplying the load, the voltage seen at the Load Terminals will be 0.3V ± 0.1V less than the voltage at the Battery Terminals.
  • Page 26 SeCtION 7 | limiting electro-Magnetic Interference (eMI) supplies do not employ high frequency switching voltages and will be quieter as com- pared 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.
  • Page 27 SeCtION 7 | limiting electro-Magnetic Interference (eMI) 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.

  • Page 28: Troubleshooting Guide

    SeCtION 8 | troubleshooting Guide 1. GeneRAL Symptom Possible cause Remedy ON/OFF Switch is ON Associated Power supply Module has Remove the defective module(s) and and is lighted. One or become defective. replace with new module(s) more “PSM Status” LED • The unit will still operate normally (s) is not lighted as the remaining working module(s)
  • Page 29 SeCtION 8 | troubleshooting Guide Symptom Possible cause Remedy ON / OFF Switch is ON If the voltage loses regulation Reduce the current drawn by the load to • Switch is lighted and drops to < 54.2V, the unit is less than the continuous rating of 25A. • DC Output voltage overloaded and is in current limit.
  • Page 30 SeCtION 8 | troubleshooting Guide 3. BAtteRY BAckUP oPeRAtion - eXteRnAL BAtteRY iS connecteD (continued) Symptom Possible cause Remedy ON / OFF Switch is ON 25A Fuse (F2) in the Load circuit is Remove the cause of the overload • Switch is lighted blown due to: or short circuit.

  • Page 31: Specifications

    SeCtION 9 | Specifications PARAMeteR SPeciFicAtion No of MoDULES - Input Voltage 120 VAC Nominal (+6% / -10%), 50/60 Hz Input Current 20A @ 120 VAC AC INPUT Peak Efficiency > 83% Power Factor 0.74 at 25A load Output Voltage at Load Terminals No Load: 54.8V / 25A Load: 54.2V Output Voltage at Battery No Load: 54.8V / 25A Load: 54.2V...
  • Page 32 SeCtION 9 | Specifications PARAMeteR SPeciFicAtion AC Input Connection Attached Power Cord: • 3 x 12 AWG, 5 ft. • 30A Plug, NEMA 15-30P INPUT / oUTPUT DC Output Connectors for Load Terminal with Tubular Hole - Diameter 5/16”and CoNNECTIoNS and Battery Connections set screw (5/16”, 24 TPI, 3/8”...

  • Page 33: Warranty

    2 YeAR LiMiteD WARRAntY SEC-4825BRM 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 2 years for the United States and Canada, and is in effect from the date of purchase by the user (the “Purchaser“).
  • Page 34 Notes 34 | SAMLEX AMERICA INC.
  • Page 35 Notes...
  • Page 36 Information Toll Free Numbers Ph: 800 561 5885 Fax: 888 814 5210 Local Numbers Ph: 604 525 3836 Fax: 604 525 5221 Website www.samlexamerica.com USA Shipping Warehouse Kent WA Canadian Shipping Warehouse Delta BC Email purchase orders to orders@samlexamerica.com 11001-SEC-4825BRM-0114...

Table of Contents